TY - THES A1 - Pecenka, Ralf T1 - Optimieren der Reinigung von Hanffasern auf Kammschütteln KW - Faserhanf KW - Hanfverarbeitung KW - Vergleichsverfahren Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-5879 ER - TY - GEN A1 - Ay, Peter A1 - Kenn, Barbara A1 - Alter, Marcus Daniel T1 - Strukturierte Filterelemente als Trägermaterial für Mikroorganismen in der Wasseraufbereitung am Beispiel der Denitrifikation von belastetem Grund- und Trinkwasser T2 - Forum der Forschung KW - Denitrifikation KW - Wasseraufbereitung Y1 - 2002 SN - 0947-6989 VL - 8 IS - 15 SP - 76 EP - 81 ER - TY - THES A1 - Nagel, Manfred T1 - Zur inneren Morphogenese von Flocken mittels Clusteranalyse Y1 - 2001 ER - TY - THES A1 - Pritzkow, Olaf T1 - Untersuchungen zum Um- und Durchströmungsverhalten von einzelnen Agglomeratstrukturen KW - Agglomerat KW - Umströmung KW - Durchströmung KW - Fluid-Feststoff-System KW - Strömungsverhalten KW - Magnetfeldfixierung KW - Reynolds-Zahl KW - Fraktal Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-187 ER - TY - THES A1 - Bähr, Susanne T1 - Experimentelle Untersuchungen zu Grundprozessen der Pelletierungsflockung KW - Schlammentwässerung KW - Pellet KW - Ausflockung KW - Pelletierungsflockung KW - Schlammkonditionierung KW - Entwässerung KW - Aggregatstruktur Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-345 ER - TY - THES A1 - Hildebrandt, Sven T1 - Agglomeration von Fasermaterialien - Prozess und anlagentechnische Untersuchungen der angepassten Faseragglomeration sowie deren Produktcharakterisierung KW - Faseraufbereitung KW - Agglomeration KW - Bastfasern Y1 - 2009 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-7911 UR - http://opus.kobv.de/btu/volltexte/2009/791/ ER - TY - PAT A1 - Narra, Satyanarayana A1 - Ay, Peter A1 - Glaser, Claudia T1 - Vorrichtung und Verfahren zur Agglomeration der Ablauge eines Cellulosegewinnungsprozesses Y1 - 2013 ER - TY - PAT A1 - Narra, Satyanarayana A1 - Ay, Peter T1 - Verfahren zur Herstellung von säurebeständigen Biopolymer-Lignin-Membranen Y1 - 2012 ER - TY - PAT A1 - Narra, Satyanarayana A1 - Ay, Peter A1 - Glaser, Claudia A1 - Logsch, Florian T1 - Verfahren zur Herstellung von wasserunlöslichen Lignin-Agglomeraten Y1 - 2012 ER - TY - GEN A1 - Oyegbile, Benjamin A1 - Narra, Satyanarayana T1 - The roles of emerging environmental contaminants in future impact assessments of wastewater treatment plants in Europe T2 - Journal of the Polish Mineral Engineering Society Y1 - 2013 SN - 1640-4920 IS - 2 SP - 85 EP - 90 ER - TY - GEN A1 - Oyegbile, Benjamin A1 - Narra, Satyanarayana T1 - Impending natural gas supply glut and biogas developments in Europe: Economic and environmental implications T2 - Journal of Environment and Earth Science Y1 - 2012 SN - 2224-3216 VL - 2 IS - 11 SP - 1 EP - 7 ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Dasgupta, Sunanda A1 - Ay, Peter A1 - Zeng, T. A1 - Weller, N. T1 - Pelletisation of Rye- and Wheat straw with additives T2 - 19th European Biomass Conference and Exhibition, proceedings, ICC Berlin International Congress Center Berlin, Germany, conference 6 - 10 June 2011 Y1 - 2011 SN - 978-88-89407-55-7 PB - ETA-Florence Renewable Energies CY - Florence ER - TY - CHAP A1 - Karthikeyan, J. A1 - Ay, Peter A1 - Narra, Satyanarayana T1 - Energy Production from Agricultural residues and Crop processing Wastes: Some Problems and Perspectives T2 - International Conference on Green Power Generation: Vision 2020 Y1 - 2010 U6 - https://doi.org/10.13140/2.1.3330.8965 ER - TY - CHAP A1 - Markowski, Jens A1 - Narra, Satyanarayana A1 - Ay, Peter A1 - Pempel, Harry A1 - Müller, Mike T1 - Automatic disassembly and recycling of lithium-traction-accumulators T2 - Proceedings, XXVII. IMPC, Santiago de Chile, 2014 N2 - Within the next few years major changes in mobility are expected. Increasing numbers of electric powered cars, electrobikes and E-Scooters define the transport sector. Recently lithium based traction batteries as storage medium have led into matrurity of series production combining high electrical efficiencies with low weights and compact dimensions. Due to the relatively young development with lithium batteries utilization, only few investigation were conducted regarding their recycling. Conventional battery recycling processes can not be applied due to differences in design and chemistry. So an automated disassembly and processing procedure for lithium traction batteries has been developed in the R/D-project "Li-WERT". Instead of complete smelting of the batteries without pretreatment, an automated disassembly and specific treatment of the material streams was realised, adjusted to the needs of the subsequent recovery technologies. A higher quality, with reduced expenses for the separation of fine-grained or fused material mixes, can be obtained for the individual components. The automated disassembly using an industrial robot significantly reduces dangers for the operating crew. The selective disassembly and beneficiation allows full recovery of the fractions. The batteries will be disassembled to cell level by the industrial robot. Anodes, cathodes, and separation layers are isolated and processed. The technology is designed, that no waste is generated for disposal. The pelletised cathode coating and the other separated metals (stainless steel, copper, aluminum) can be used in respective metallurgical plants. Circuit boards and plug contacts are also coveted secondary raw materials for reuse. The process is modular and offers high flexibility, e. g. for new battery types/ sizes by quick adjustment of the robot and tool change. Adaptation to other cathode materials (e. g. Li[FePO]) is possible. After finishing the R/D-project, a pilot plant for demontage was realised in 2013. KW - lithium traction accumulator KW - dismantling KW - recycling Y1 - 2014 SP - 227 EP - 236 PB - GECAMIN CY - Santiago de Chile ER - TY - CHAP A1 - Markowski, Jens A1 - Ay, Peter A1 - Pempel, Harry A1 - Müller, Mike T1 - Entwicklung eines innovativen Verfahrens zur automatisierten Demontage und Auf-bereitung von Lithium-Ionen-Batterien aus Fahrzeugen T2 - Recycling und Rohstoffe : Band 5 N2 - Die automobile Antriebstechnik steht in den nächsten Jahrzehnten vor tief greifenden Verän-derungen. Nachdem über 125 Jahre der Verbrennungsmotor die vorherrschende Antriebsart darstellte, basieren neue Entwicklungen auf Elektroantrieben oder auf der Kombination ver-schiedener Antriebsformen. Fahrzeuge mit elektrischen Antrieben haben mittlerweile den Status der Serienreife erreicht und werden perspektivisch zunehmend das Straßenbild be-stimmen. Mit der so genannten Lithium-Ionen-Traktionsbatterie wurde in den letzten Jahren ein Spei-chermedium zur Serienreife geführt, welches einen hohen elektrischen Wirkungsgrad mit kompakten Maßen und geringem Eigengewicht vereinigt. Mit den auf der Nutzung von Li-thium-Akkumulatoren basierenden Antriebskonzepten kann ein entscheidender Schritt zur Umsetzung einer umfassenden Verbreitung der elektrischen Antriebstechnik im Bereich der individuellen Mobilität erfolgen. KW - Lithium-Akkumulator KW - Demontage KW - robotergestützt Y1 - 2012 SN - 978-3-935317-82-5 SP - 443 EP - 456 PB - TK Verlag Karl Thomé-Kozmiensky CY - Neuruppin ET - 1. Auflage ER - TY - PAT A1 - Ay, Peter A1 - Glaser, Claudia A1 - Hildebrandt, Sven A1 - Müller-Fehn, Siegfried T1 - Verfahren und Vorrichtung zur Herstellung von kugelförmigen Fasermengen N2 - Hauptanspruch: Verfahren zur Herstellung von kugelförmigen Gebilden aus Fasern, - indem das Fasermaterial portioniert wird, - die portionierte Menge von Fasern in einem horizontal und vertikal begrenzten kreisförmig ausgebildeten Rollraum auf einem konstanten Umlaufradius einem Rollprozess unterzogen wird, der durch unterschiedliche Relativbewegungen zueinander erzeugende Rotationen einzelner ebener kreisförmiger Bauteile charakterisiert ist und - nach Erreichen einer im Wesentlichen allseitig nahezu runden Form der portionierten Menge von Fasern diese als Rollagglomerat aus dem Rollprozess ausgetragen wird. KW - Naturfasern, Rollagglomeration, Rollagglomerationsverfahren Y1 - 2006 ER - TY - PAT A1 - Koch, Roland A1 - Ay, Peter A1 - Pritzkow, Olaf A1 - Preuß, Volker T1 - Herstellung und Verwendung von agglomerierten Naturfasern zum Zweck der biochemischen Wasseraufbereitung Y1 - 2003 ER - TY - PAT A1 - Ay, Peter A1 - Brandes, Verona A1 - Koch, Roland A1 - Walaszek, Wiktoria T1 - Verfahren und Anordnung zur Herstellung von Pellets aus Eisenhydroxidschlämmen sowie deren Verwendung Y1 - 2006 ER - TY - GEN A1 - Narra, Satyanarayana A1 - Tao, Yonggui A1 - Glaser, Claudia A1 - Gusovius, Hans-Jörg A1 - Ay, Peter T1 - Increasing the calorific value of Rye straw pellets with biogenous and fossil additives T2 - Energy and Fuels Y1 - 2010 SN - 0887-0624 VL - 24 IS - 9 SP - 5228 EP - 5234 ER - TY - GEN A1 - Narra, Satyanarayana T1 - Structural development of clay soil with the amendment of coal combustion by-product FGD gypsum in Lusatia Germany T2 - International Journal of Soil Science Y1 - 2010 SN - 1816-4978 VL - 5 IS - 2 SP - 62 EP - 72 ER - TY - GEN A1 - Narra, Satyanarayana T1 - Modeling water-induced compaction of the Saalian glacial till in lower Lusatia T2 - International Journal of Soil Science Y1 - 2010 SN - 1816-4978 VL - 5 IS - 1 SP - 26 EP - 33 ER - TY - GEN A1 - Narra, Satyanarayana T1 - Flue Gas Desulphurization Gypsum as a Soil Amendment in the Growth of Wild Rye and Poplar (Hybrid 275 and Weser 6) Clones in Lusatia, Germany T2 - International Journal of Agricultural Research Y1 - 2009 VL - 4 IS - 10 SP - 297 EP - 309 ER - TY - GEN A1 - Narra, Satyanarayana T1 - Influence of compaction curve modeling on void ratio and pre-consolidation stress T2 - International Journal of Soil Science Y1 - 2009 SN - 1816-4978 VL - 4 IS - 2 SP - 57 EP - 66 ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Logsch, Florian A1 - Glaser, Claudia A1 - Ay, Peter A1 - Döhling, Frank A1 - Leistner, Diana A1 - Strube, Dieter ED - Thrän, Daniela ED - Pfeiffer, Diana T1 - LignoBioFuel : Entwicklung eines Verfahrens zur Herstellung von stofflich und energetisch nutzbaren Bioagglomeraten auf der Basis von Lignin T2 - Effizient, umweltverträglich, dezentral - neue Konzepte für die Nutzung von biogenen Festbrennstoffen, Bd. 2 Y1 - 2014 SP - 85 EP - 99 PB - DBFZ, Dt. Biomasseforschungszentrum CY - Leipzig ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Logsch, Florian A1 - Glaser, Claudia A1 - Ay, Peter ED - Thrän, Daniela ED - Pfeiffer, Diana T1 - Erzeugung von Bioagglomeraten auf der Basis ligninhaltiger Ablaugen der Papier- und Zellstoffindustrie T2 - Effizient, umweltverträglich, dezentral - neue Konzepte für die Nutzung von biogenen Festbrennstoffen, Bd. 2 Y1 - 2013 SP - 247 EP - 264 PB - DBFZ, Dt. Biomasseforschungszentrum CY - Leipzig ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Ay, Peter ED - Mendez-Vilas, A. T1 - Build-up granulation of lignin sludge’s as innovative process improving its energy efficiency T2 - Fuelling the future : advances in science & technologies for every generation, transmission and storage Y1 - 2012 SN - 978-1-61233-558-2 SP - 9 EP - 14 PB - BrownWalker Press CY - Boca Faton, FL ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Glaser, Claudia A1 - Gusovius, Hans-Jörg A1 - Stollberg, Christian A1 - Ay, Peter ED - Zaikov, Gennadij E. ED - Pudel, Frank ED - Spychalski, Grzegorz T1 - Agricultural residues as a renewable source of bioenergy with special focus on cereal straws T2 - Renewable resources and biotechnology for material applications Y1 - 2011 SN - 978-1-61209-521-9 SP - 67 EP - 79 PB - Nova Publishers CY - Magdeburg ER - TY - CHAP A1 - Narra, Satyanarayana ED - Schmidt, Michael ED - Onyango, Vincent ED - Palekhov, Dmitry T1 - Bioenergy production: special emphasis on rice husks usage in India T2 - Implementing Environmental and Resource Management Y1 - 2011 SN - 978-3-540-77567-6 SP - 15 EP - 22 PB - Springer-Verlag CY - Berlin [u.a.] ER - TY - CHAP A1 - Tukdeo, Shrinivas A1 - Narra, Satyanarayana ED - Schmidt, Michael ED - Onyango, Vincent ED - Palekhov, Dmitry T1 - Wind Power Projects in India and Clean Development Mechanism (CDM) Approach T2 - Implementing Environmental and Resource Management Y1 - 2011 SN - 978-3-540-77567-6 SP - 61 EP - 68 PB - Springer-Verlag CY - Berlin [u.a.] ER - TY - GEN A1 - Oyegbile, Benjamin A1 - Ay, Peter A1 - Narra, Satyanarayana T1 - Optimization of Physicochemical Process for Pre-treatment of Suspension by Flocculation Prior to Dewatering T2 - Desalination and water treatment Y1 - 2016 U6 - https://doi.org/10.1080/19443994.2015.1043591 SN - 1944-3986 N1 - Presented at the International Congress on Water, Waste and Energy Management 16–18 July 2014, Porto, Portugal VL - 57 IS - 6 SP - 2726 EP - 2736 ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Gruhn, M. A1 - Ay, Peter T1 - Production of carbon fibres from technical lignin granules T2 - 21st European Biomass Conference and Exhibition, Copenhagen, Denmark, 3 - 7 June 2013 Y1 - 2013 U6 - https://doi.org/10.13140/RG.2.1.2139.0886 PB - ETA-Florence Renewable Energies ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Aslanjan, Jana A1 - Ay, Peter T1 - Macroencapsulation of biogas residues increasing the fertilizer efficiency T2 - 21st European Biomass Conference and Exhibition, Copenhagen, Denmark, 3 - 7 June 2013 Y1 - 2013 U6 - https://doi.org/10.13140/RG.2.1.3187.6642 PB - ETA-Florence Renewable Energies ER - TY - PAT A1 - Ay, Peter A1 - Gusovius, Hans-Jörg A1 - Hildebrandt, Sven T1 - Verfahren und Einrichtung zur Herstellung von pelletartigen Körpern aus ungebundenen Fasern KW - Faserpelletierung Y1 - 2005 ER - TY - PAT A1 - Ay, Peter A1 - Narra, Satyanarayana A1 - Glaser, Claudia T1 - Vorrichtung zur Herstellung von Agglomeraten N2 - Die Erfindung betrifft eine Rollagglomerations-Vorrichtung zur Herstellung von Agglomeraten aus einem Feststoff-Füssigkeitsgemisch. Die Vorrichtung weist ein Transportmittel zum Transport eines Feststoff-Flüssigkeitsgemisches in Richtung der Längsachse des Transportmittles und ein Pressmittel auf, welches so zum Transportmittel beabstandet angeordnet ist, dass ein Pressmittel auf das auf der Auflagefläche des Transportmittels befindlichen Feststoff-Flüssigkeitsgemisches einen Druck ausüben kann, wobei das Transportmittle oder das Pressmittel quer zur Längsachse des Transportmittels bewegbar sind. KW - Feststoff-Flüssigkeitsgemisch, Rollagglomerations-Vorrichtung, Rollagglomeration, Entwässerung, Agglomeratbildung, Y1 - 2014 ER - TY - PAT A1 - Narra, Satyanarayana A1 - Glaser, Claudia A1 - Ay, Peter T1 - Verfahren zur Herstellung von Langzeitdünger aus Gärresten mittels Verkapselung N2 - Die Erfindung betrifft ein Verfahren zur Herstellung von Dünger aus Gärresten, wobei die Inhaltsstoffe aus den enthaltenen Zubereitungen lang anhaltend freigesetzt werden. KW - Gärreste, Langzeitdünger, Verkapselung, Agglomerate, Aufbauagglomeration Y1 - 2014 ER - TY - PAT A1 - Narra, Satyanarayana A1 - Glaser, Claudia A1 - Ay, Peter A1 - Logsch, Florian T1 - Verfahren zur Herstellung von wasserunlöslichen Lignin-Agglomeraten N2 - Die Erfindung betrifft ein Verfahren zur Herstellung von wasserunlöslichen Agglomeraten aus Ablauge eines Cellulosegewinnungsprozesses. Erfindungsgemäß umfasst das Verfahren die folgenden Schritte: 1. Durchführung einer Granulation mit der Ablauge zur Erzeugung von Lignin-Agglomeraten und 2. Behandeln der erzeugten Lignin-Agglomerate mit einer Säure. KW - Sprühgranulation Lignin-Agglomerate, Agglomeration von Ligninen Y1 - 2013 ER - TY - RPRT A1 - Schlummer, Martin A1 - Wagenknecht, Udo A1 - Markowski, Jens T1 - Verkehrsfähige Polymer-Recyclate aus der Elektro(nik)altgeräteverwertung durch spektroskopische Sortierung und dichtebasierte Störstoffabtrennung N2 - Schlussbericht Projekt SpectroDense KW - Kunststoffabfall KW - Sortieren Y1 - 2011 PB - Fraunhofer IVV CY - Freising ER - TY - GEN A1 - Ay, Peter A1 - Glaser, Claudia T1 - Aufbereitung von Fettsäuregemischen aus nachwachsenden Rohstoffen T2 - Forum der Forschung KW - Schmelzkristallisation Y1 - 2003 SN - 0947-6989 VL - 7 IS - 16 SP - 135 EP - 142 ER - TY - GEN A1 - Ay, Peter A1 - Gusovius, Hans-Jörg A1 - Pecenka, Ralf A1 - Fürll, Christian T1 - Aufbereitung und Nutzung von Faserpflanzen T2 - Forum der Forschung KW - Naturfasern Y1 - 2003 SN - 0947-6989 VL - 7 IS - 16 SP - 143 EP - 148 ER - TY - THES A1 - Stollberg, Christian T1 - Entwicklung eines Verfahrens zur Aufbereitung komplexer Fahrzeugbaugruppen im Hinblick auf ein stoffliches Recycling von Kunststoffen aus automobilen Anwendungen KW - Altfahrzeuge Y1 - 2004 SN - 3-89873-967-8 PB - Cuvillier CY - Göttingen ET - 1. Auflage ER - TY - CHAP A1 - Hildebrandt, Sven A1 - Ay, Peter A1 - Gusovius, Hans-Jörg A1 - Glaser, Claudia A1 - Stollberg, Christian T1 - Possibilities and working of the specific agglomeration of fibrous materials and residues T2 - XXV International Mineral Processing Congress, IMPC 2010, Brisbane, Australia 6-10 September 2010 KW - Agglomeration fibrous material Y1 - 2010 PB - AusIMM CY - Carlton South, Australia ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Glaser, Claudia A1 - Brinker, Mona A1 - Bednarek, R. A1 - Gusovius, Hans-Jörg A1 - Ay, Peter T1 - Vergleich verschiedener Bildanalysesysteme zur Bestimmung der Partikelgrößenverteilung von zerkleinertem Stroh und deren charakteristischer Einfluss auf Stabilität und Festigkeit von Biomassepellets T2 - Aufbereitung und Recycling, 10. und 11. November 2010, Freiberg, Jahrestagung der UVR e.V. und FIA e.v. KW - Partikelgrößenverteilungen von Stroh Y1 - 2010 SP - S. 35 CY - Freiberg ER - TY - GEN A1 - Stollberg, Christian A1 - Peda, Stefan A1 - Smieszek, Marlene A1 - Gerath, H. A1 - Jurischka, Constantin A1 - Ay, Peter T1 - New Downstream approaches for highly pure substances and bio fine chemicals from plant materials T2 - Agricultural Engineering : Research papers KW - bio fine chemicals Y1 - 2011 SN - 1392-1134 N1 - International scientific conference, Agriculture and Environment 2011, Kaunoraj, Litauen VL - 43 IS - 3 SP - 58 EP - 66 ER - TY - CHAP A1 - Schmidt, M. A1 - Stollberg, Christian A1 - Pempel, Harry T1 - Kunststoffrecycling auf hohem Niveau T2 - Jahrbuch des Bundesministeriums für Bildung und Forschung 2004 KW - Kunststoffrecycling Y1 - 2004 SP - S. 76 ER - TY - GEN A1 - Ay, Peter A1 - Behnsen, Petra A1 - Schimke, Barbara T1 - Denitrifikation von belastetem Grund- und Trinkwasser in mit Mikroorganismen immobilisierten speziell strukturierten Filterelementen T2 - Chemie - Ingenieur - Technik KW - Denitrifikation Y1 - 1996 SN - 1522-2640 VL - 68 IS - 7 SP - 812 EP - 815 ER - TY - GEN A1 - Nagel, Manfred A1 - Ay, Peter T1 - Characterization of floc structure using cluster analysis T2 - Particle and Particle Systems Characterization KW - cluster analysis Y1 - 1999 SN - 1521-4117 VL - 16 IS - 5 SP - 229 EP - 237 ER - TY - CHAP A1 - Gaydardzhiev, Stoyan A1 - Ay, Peter ED - Pratsinis, Sotiris E. T1 - Implication of surface charge effects in colour removal from effluents by chemical coagulation in the case of CI Reactive Blue dye T2 - Partec 2004, proceedings, Nürnberg, Germany 16 - 18 march 2004, International Congress for Particle Technology KW - Flocculation Y1 - 2004 PB - NürnbergMesse-GmbH CY - Nürnberg ER - TY - GEN A1 - Stollberg, Christian A1 - Ploetz, Christiane A1 - Reuscher, Guenter T1 - Sortenreiner Kunststoff aus Alt-KFZ T2 - Umweltmagazin KW - Kunststoffrecycling Y1 - 2005 SN - 0173-363X VL - 35 IS - 3 SP - 38 EP - 39 ER - TY - CHAP A1 - Stollberg, Christian A1 - Pempel, Harry A1 - Schwabe, M. A1 - Ay, Peter T1 - Qualitätssicherung bei der automatischen Rückgewinnung von Kunststoffen aus komplexen automobilen Anwendungen T2 - TECHNOMER 2005, 19. Fachtagung über Verarbeitung und Anwendung von Polymeren, 10. - 12. November 2005, Chemnitz KW - Kunststoffrecycling aus Alt-KFZ Y1 - 2005 PB - Techn. Univ. CY - Chemnitz ER - TY - GEN A1 - Woldt, Thomas A1 - Gjardy, Georg A1 - Hildebrandt, Sven A1 - Grünewald, Holger A1 - Stock, Oliver A1 - Schneider, Bernd Uwe T1 - Systemintegration dezentraler Energiewandlungsanlagen unter besonderer Berücksichtigung regenerativer Energieträger T2 - Forum der Forschung KW - regenerative Energien Y1 - 2006 SN - 0947-6989 IS - 19 SP - 69 EP - 74 ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Glaser, Claudia A1 - Gusovius, Hans-Jörg A1 - Stollberg, Christian A1 - Ay, Peter ED - Zaikov, Gennadij E. T1 - Agricultural residues as a renewable source of bio-Energy with special focus on cereal straws T2 - Renewable resources and biotechnology for material applications, proceeding of the 16th International Conference for Renewable Resources and Plant Biotechnology (NAROSSA 2010), held in Magdeburg, Germany, June 7 - 8, 2010 KW - Agriculture residues Y1 - 2010 SN - 978-1-61209-521-9 SP - 67 EP - 80 PB - Nova Science Publ. CY - New York ER - TY - CHAP A1 - Nagel, Manfred A1 - Ay, Peter T1 - Verbesserung der Entwässerungseigenschaften von Schlämmen durch den gezielten Aufbau von Flockenstrukturen auf der Basis detaillierter morphologischer Analysen T2 - Verfahrenstechnik der Abwasser- und Schlammbehandlung additive und prozeßintegrierte Maßnahmen, 4. GVC-Abwasser-Kongreß 1999, 6. - 8. September 1999, Congress Centrum Bremen, Preprints, Bd. 2 KW - Schlammentwässerung Y1 - 1999 SN - 3-9805032-7-5 SP - 887 EP - 892 PB - Fuck CY - Koblenz ER - TY - CHAP A1 - Nagel, Manfred A1 - Ay, Peter T1 - Three-dimensional Reconstruction of flocs growth history T2 - Product engineering & chemical engineering now, proceedings of 2nd European Congress of Chemical Engineering (ECCE 2), 5 - 7 October 1999, Monpellier, France KW - Floc growth history Y1 - 1999 SN - 2-910239-00-4 SP - 361 EP - 368 PB - Technique et Documentation-Lavoisier CY - Cachan, France ER - TY - GEN A1 - Alter, Marcus Daniel A1 - Ay, Peter T1 - Aufbereitung von Textilabwässern am Beispiel der Entfärbung von Azofarbstoffen mittels Trägerbiologie T2 - Forum der Forschung KW - Azofarbstoffe Y1 - 2000 SN - 0947-6989 VL - 5 IS - 11 SP - 145 EP - 151 ER - TY - GEN A1 - Bähr, Susanne A1 - Ay, Peter T1 - Konditionierung und Enwässerung von industriellen und kommunalen Schlämmen durch Pelletierungsflockung T2 - Forum der Forschung KW - Pelletierungsflockung Y1 - 2000 SN - 0947-6989 VL - 5 IS - 11 SP - 139 EP - 144 ER - TY - CHAP A1 - Ay, Peter A1 - Nagel, Manfred T1 - A new concept for the process design of flocculation process T2 - Proceedings of the XXI International Mineral Processing Congress, Rome, Italy, July 23 - 27, 2000 KW - Flocculation Y1 - 2000 PB - Elsevier CY - Amsterdam [u.a.] ER - TY - CHAP A1 - Nagel, Manfred A1 - Ay, Peter T1 - Mathematical Desciption of the Morphological genesis of flocs, Cluster analysis of flocs T2 - PARTEC 2001, International Congress for Particle Technology, Nürnberg, Germany, 27-29 March 2001 KW - cluster analysis Y1 - 2001 N1 - CD-ROM CY - Nürnberg ER - TY - CHAP A1 - Bähr, Susanne A1 - Ay, Peter T1 - Pelleting flocculation in a rotary drum reactor T2 - PARTEC 2001, International Congress for Particle Technology, Nuremberg, Germany, 27-29 March 2001 KW - Flocculation Y1 - 2001 PB - Nürnberg ER - TY - CHAP A1 - Ay, Peter A1 - Gaydardzhiev, Stoyan T1 - Removal of dyes from effluents by chemical coagulation: Surface charge and particle size aspects T2 - Mineral Processing in the 21st Century, proceedings of the X Balkan Mineral Processing Congress, Varna, Bulgaria, June 15-20, 2003 KW - coulor removal Y1 - 2003 CY - Sofia ER - TY - CHAP A1 - Stollberg, Christian A1 - Namango, Saul A1 - Schmidt, M. A1 - Pohl, R. A1 - Ay, Peter T1 - Preparation of plastics for automatic identification as the first step in recycling of automotive parts T2 - Proceedings of the XXII International Mineral Processing Congress, Cape Town, South Africa, 29 September - 3 October 2003 KW - automobile recycling Y1 - 2003 PB - South African Institute of Mining & Meta CY - Marshalltown, South Africa ER - TY - CHAP A1 - Hildebrandt, Sven A1 - Ay, Peter A1 - Gusovius, Hans-Jörg T1 - Möglichkeiten und Wirkprinzipien der angepassten Agglomeration von Naturfasern für den Einsatz in naturfaserverstärkten Kunststoffen T2 - Internationales Symposium "Werkstoffe aus Nachwachsenden Rohstoffen", 01. + 02. September 2005, Messe Erfurt, Tagungsband KW - naturfaserverstärkte Kunststoffe Y1 - 2005 PB - Gesellschaft für Messe- und Veranstaltungsmanagement CY - Erfurt ER - TY - CHAP A1 - Hildebrandt, Sven A1 - Ay, Peter A1 - Gusovius, Hans-Jörg T1 - Erweiterte Einsatzmöglichkeiten für neuartige Faseragglomerate T2 - Internationales Symposium "Werkstoffe aus Nachwachsenden Rohstoffen", 01. + 02. September 2005, Messe Erfurt, Tagungsband KW - Faseragglomerate Y1 - 2005 PB - Gesellschaft für Messe- und Veranstaltungsmanagement CY - Erfurt ER - TY - CHAP A1 - Gaydardzhiev, Stoyan A1 - Ay, Peter ED - Önal, Güven T1 - Characterization of stability behaviour of ultra fine alumina powder in view its colloidal processing by gel-casting T2 - Proceedings of the XXIII International Mineral Processing Congress, Istanbul, Turkey 3-8 September 2006, Vol. 1 KW - Gel-casting Y1 - 2006 SN - 975-7946-28-1 SP - 464 EP - 467 PB - Promed Advertising Agency CY - Istanbul ER - TY - CHAP A1 - Walaszek, Wiktoria A1 - Ay, Peter ED - Önal, Güven T1 - Pelleting flocculation as a tool to optimize slugde conditioning T2 - Proceedings of the XXIII International Mineral Processing Congress,Istanbul, Turkey 3-8 September 2006, Vol. 2 KW - pelleting flocculation Y1 - 2006 SN - 975-7946-29-X SP - 1631 EP - 1636 PB - Promed Advertising Agency CY - Istanbul ER - TY - GEN A1 - Schlummer, Martin A1 - Arends, Dagmar A1 - Mäurer, Andreas A1 - Markowski, Jens A1 - Wagenknecht, Udo T1 - Characterisation and materials flow management for waste electrical and electronic equipment plastics from German dismantling centres T2 - Waste Management & Research N2 - Waste electrical and electronic equipment is a complex waste stream and treatment options that work for one waste category or product may not be appropriate for others. A comprehensive case study has been performed for plastic-rich fractions that are treated in German dismantling centres. Plastics from TVs, monitors and printers and small household appliances have been characterised extensively. Based on the characterisation results, state-of-the-art treatment technologies have been combined to design an optimised recycling and upgrade process for each input fraction. High-impact polystyrene from TV casings that complies with the European directive on the restriction of hazardous substances (RoHS) was produced by applying continuous density separation with yields of about 60%. Valuable acrylonitrile butadiene styrene/ polycarbonate can be extracted from monitor and printer casings by near- infrared-based sorting. Polyolefins and/or a halogen-free fraction of mixed styrenics can be sorted out by density separation from monitors and printers and small household appliances. Emerging separation technologies are discussed to improve recycling results. KW - Waste electrical and electronic equipment plastics KW - recycling, separation KW - characterisation, near-infrared Y1 - 2015 U6 - https://doi.org/10.1177/0734242x15588585 SN - 1096-3669 VL - 33 IS - 9 SP - 775 EP - 784 ER - TY - GEN A1 - Dasgupta, Sunanda A1 - Ay, Peter A1 - Kommolk, Ralf A1 - Su, Xu T1 - Kinetics of Melt Crystallization of a Sunflower Oil-Based Polyunsaturated Fatty Acid Mixture T2 - Chemical Engineering & Technology N2 - Important parameters like supercooling and cooling rates affecting the melt crys- tallization of a polyunsaturated fatty acid (PUFA) mixture obtained from sun- flower oil were investigated and compared via high-resolution polarized-light mi- croscopy. PUFA was thermally characterized in a differential scanning calorimeter and the significant liquid-solid-phase transition temperatures determined were then implemented in the development of specific temperature profiles. Analyzed between two glass slides, induction times were found to decrease with low crystal- lization temperatures and the number of nuclei per unit area increased with high- er supercooling and cooling rates. A comparison between the linear crystal growth rates of pure standards of each of the main fatty acids present in the PUFA mixture and the PUFA mixture itself indicated that the latter is much slower than that of each of its pure components. KW - Differential scanning calorimetry; Fatty acids; Melt crystallization Y1 - 2013 UR - http://onlinelibrary.wiley.com/doi/10.1002/ceat.201200524/abstract U6 - https://doi.org/10.1002/ceat.201200524 SN - 0930-7516 SN - 1521-4125 VL - 36 IS - 7 SP - 1225 EP - 1230 ER - TY - GEN A1 - Dasgupta, Sunanda A1 - Ay, Peter A1 - Schulz, Stephanie T1 - Determination and Comparison of Equilibrium Data of Various Plant-Based Fatty Acid Mixtures T2 - Chemical Engineering & Technology N2 - Multistage melt crystallization of a variety of plant-based polyunsaturated fatty acid (PUFA) mixtures was conducted to obtain an overview on their liquid-solid equilibrium behavior. Crystal fraction and mother liquor samples were analyzed at every stage. Phase behavior diagrams at low saturated fatty acid concentrations were investigated in detail as they are of significant technical relevance with respect to efficient depletion of the saturated content from the samples. A high oleic acid content in the PUFA mixtures led to difficulties in depleting the mother liquor from the saturated content by melt crystallization. Thermograms from the differential scanning calorimetry were supplemented with illustrations which allow a novel interpretation of results and verification of conclusions. KW - Differential scanning calorimeter, Fatty acids, Liquid-solid phase diagram, Metastable zone, Multistage melt crystallization Y1 - 2014 UR - http://onlinelibrary.wiley.com/doi/10.1002/ceat.201300630/abstract U6 - https://doi.org/10.1002/ceat.201300630 SN - 0930-7516 VL - 37 IS - 6 SP - 1002 EP - 1008 ER - TY - CHAP A1 - Eckert, Karl-Andreas A1 - Dasgupta, Sunanda A1 - Selge, Benjamin A1 - Ay, Peter T1 - Liquid solid phase behavior of ternary fatty acid systems of palmitic, stearic, oleic and linoleic acid T2 - Book of Abstracts of the 8th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry Karlsruhe, March 29–31, 2015 N2 - Enrichment of natural unsaturated fractions by melt crystallization processes has already been proved to be effective in prior investigations [1]–[3]. Palmitic, stearic, oleic, linoleic and linolenic acid are the five main fatty acids present in most of these plant based natural oils. There is quite a bit of information about the liquid solid phase behavior of binary mixtures such as palmitic-oleic, stearic-oleic and palmitic-stearic acid mixtures in literature [4]–[6]. Recent investigations have shown phase diagrams of real natural oil based fatty acid systems containing up to 19% saturated content (11% stearic acid and 8% palmitic acid) [7]. Yet, there is hardly any information regarding ternary systems as those of palmitic-stearic-oleic and palmitic-stearic-linoleic acids. In this work, synthetic mixtures have been used in order to obtain a complete overview of the liquid solid phase diagrams of these ternary mixtures. To imitate naturally occurring mixtures, a mixture with 1:1 ratio of palmitic stearic acid was prepared. Varying amounts of either oleic or linoleic acids were added to this mixture in order to obtain the entire range required for the phase diagrams. These mixtures were then subjected to a specific profile with a wide temperature range in a Differential Scanning Calorimeter (DSC) so as to record every phase transition. This study successfully concludes that these complex mixtures could be treated as binary mixtures of their saturated and unsaturated contents. This is because there were essentially two main peaks noted in the DSC thermograms. It is to be noted that there was a third peak, assumed to represent the solid transition, in mixtures containing oleic acid. This has already been shown in detail and discussed in prior investigations [6], [7]. Another major discovery was that the solidus line depends on the type of the unsaturated content, that is, the degree of unsaturation, in the mixture. KW - Phase Diagram, Ternary Mixtures, Fatty Acids, Differential scanning calorimetry Y1 - 2015 UR - http://conferences.abiosus.org/abstract/show/630 UR - http://www.abiosus.org/Book_of_Abstracts_2015.pdf SP - S. 73 PB - abiosus e.V. Conferences CY - Karlsruhe, Germany ER - TY - CHAP A1 - Eckert, Karl-Andreas A1 - Dasgupta, Sunanda A1 - Ay, Peter T1 - Novel techniques to optically characterize melt crystallization kinetics of high oleic sunflower oil based fatty acid mixture T2 - Book of Abstracts of the 7th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry Karlsruhe, March 23–25, 2014 N2 - The rising applications of enriched unsaturated fatty acid fractions are significantly increasing the need for a cheap method of manufacturing such fractions. Melt crystallization is an established method for purification and enrichment of desired fractions from mixtures [1, 2, 3]. Enrichment of such natural unsaturated fractions by melt crystallization processes has already been proved effective in prior investigations [1, 2]. Since then many analytical and investigative methods have been applied on various natural plant oil based poly-unsaturated fatty acid (PUFA) mixtures to generate the much needed fundamental melt crystallization data [1]. One such method is the use of in-situ polarized light microscopy [1, 4, 5]. Some of the important parameters affecting the melt crystallization of PUFA mixtures are nucleation and crystal growth rate. To be able to observe and visualize these micro-scale phenomena, circular polarized transmitted light microscopy was applied. A tempered chamber (Linkam LS 120) containing the sample between two object slides was placed right within the microscope camera setup (Leica DM RME and Leica DFC 500) with a viewing window. With respect to the transmitted light, the sample was placed between two circular polarized filters such that the system is calibrated for optimal visualization. Unlike linear polarization, in this method every crystal independent of its alignment in the sample, delivers an interference color different from its background. This way, the entire crystal structure could be clearly separated from the melt. Nucleation and crystal growth rate of a high oleic sunflower oil based PUFA was measured using this method at 5K supercooling and 10K/min cooling rate. Growth curves for total crystal area and number of crystals were analyzed and illustrated graphically. A typical S- curve is observed for both the cases starting with a lag phase followed by an exponential growth phase and ending in a saturation phase. KW - Polarized light microscopy, PUFA, melt crystallization Y1 - 2014 UR - http://conferences.abiosus.org/abstract/show/559 UR - http://www.abiosus.org/Book_of_Abstracts_2014.pdf PB - abiosus e.V. Conferences CY - Karlsruhe, Germany ER - TY - GEN A1 - Dasgupta, Sunanda A1 - Rettig, Florian A1 - Ay, Peter T1 - Nucleation kinetics during melt crystallization of plant based high oleic and linoleic polyunsaturated fatty acid mixtures T2 - Crystal Growth & Design N2 - Nucleation kinetics of high linoleic and high oleic polyunsaturated fatty acid (PUFA) mixtures were investigated during melt crystallization by means of an Focused beam reflectance measurement (FBRM) sensor. Samples were analyzed thermally and chemically in the Differential Scanning Calorimeter (DSC) and Gas Chromatograph (GC) respectively. Investigations showed that a high oleic content in the PUFA mixtures lead to higher induction times, τi. Unlike previous investigations, a clear relation between τi and cooling rates was established. τi increases with increasing cooling rates and decreasing supercooling. Activation energies of nucleation, ∆Gc' were determined by means of the Fisher Turnbull equation wherein ∆Gc' decreases exponentially with increasing supercooling. Investigations and further evaluations conclude that while the plot establishes the effect of supercooling on ∆Gc' , it does not incorporate the effects of molecular diffusion or the cooling rate. Hence, 3D modeling was performed to visualize the combined effects of cooling rate and supercooling on induction time. KW - Melt crystallization, Focused beam reflectance method, Differential Scanning Calorimeter, Fatty Acids, Induction time, Gibbs free enthalpy of crystallization, Fisher Turnbull equation, Supercooling, Activation barrier Y1 - 2015 UR - http://pubs.acs.org/doi/abs/10.1021/acs.cgd.5b01432 U6 - https://doi.org/10.1021/acs.cgd.5b01432 SN - 1528-7505 VL - 16 IS - 2 SP - 861 EP - 866 ER - TY - CHAP A1 - Jurischka, C. A1 - Peda, S. A1 - Narra, Satyanarayana A1 - Smieszek, Marlene A1 - Stollberg, Christian A1 - Ay, Peter A1 - Kay, M. T1 - Innovative technologies for production of highly pure substances and bio fine chemicals from plants T2 - 18th European Biomass Conference and Exhibition, proceedings of the international conference held in Lyon, France, 3 - 7 May 2010 Y1 - 2010 SN - 978-88-89407-56-5 PB - ETA-Florence Renewable Energies CY - Florence ER - TY - CHAP A1 - Markowski, Jens T1 - Characterisation and materials flow management for WEEE plastics from German dismantling centres T2 - ISWA World Congress, Antwerpen, 2015 KW - WEEE, plastics, recycling Y1 - 2015 UR - http://iswa2015.org/downloads/category/9 PB - Interafval, Belgium ER - TY - THES A1 - Walaszek, Wiktoria T1 - Untersuchungen zu Strukturbildungsphänomenen in der Pelletierungsflockung in Abhängigkeit von der Prozessführung im Hinblick auf die Optimierung der Feststoffkonditionierung KW - Fluid-Feststoff-System KW - Ausflockung KW - Pellet KW - Agglomeration KW - Pelletierungsflockung KW - Schlammkonditionierung KW - Flockenstruktur KW - Flockeneigenschaften KW - Optimierung Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-1699 ER - TY - CHAP A1 - Dasgupta, Sunanda A1 - Ay, Peter T1 - Enrichment of unsaturated fractions in a Linseed oil based fatty acid mixture by melt crystallisation T2 - 5th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry, Karlsruhe, Germany N2 - Enriched plant based unsaturated fatty acid mixtures are increasingly finding applications in various fields like those of production of bio-fuels and polymerization of epoxy resins. In the case of production of epoxy resins, they are highly advantageous due to the presence of multiple double bonds in the fatty acids which provide opportunities for cross linking by substitution. On the other hand, bio-fuels need raw materials with very low crystallization temperatures. This special property can also be attributed to these enriched unsaturated fractions due to their weak inter-molecular interactions owing to the kink in their structures. Melt crystallization has long been established as an optimal method for purification and enrichment of fractions from mixtures [1,2]. Previous studies have shown promising results with regard to enrichment of unsaturated fractions by melt crystallization processes [1]. Melt crystallization kinetics of two plant based poly-unsaturated fatty acid mixtures have been investigated in this study [3]. A high oleic and a high linoleic fatty acid mixture were chosen for comparison purposes. A V-form reactor was developed for optimal in-situ analysis with the help of the focused beam reflectance measurement (FBRM®, Mettler Toledo Ltd., Switzerland) instrument [3]. Enhanced heat transfer especially to deal with the heat given out during crystallization was enabled through minimal volume of sample, optimized mixing and the special shape of the reactor. Important parameters like induction time, mixing speed, etc have been determined and compared as functions of degree of supercooling and composition of PUFA mixtures. In accordance to theory, the induction times in both the cases decreased with increasing supercooling and mixer speed. On the other hand, the high linoleic fatty acid mixture required much higher supercooling (4.4K to 5.4K) than the high oleic mixture (2.2K to 3.2K) for favorable induction times. References [1] S. Dasgupta, N. Dreiack, P. Ay, presented at the 5th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry (Eds: J.O. Metzger, M.A.R. Meier), Karlsruhe 2012 [2] G.F. Arkenbout, Melt Crystallization Technology, Technomic Publishing Company Inc., Pennsylvania 1995 [3] S. Xu, Master thesis, Chair of Mineral Processing, Processing of Biogenous Resources, Brandenburg University of Technology, Cottbus 2010 KW - Linseed oil, melt crystallization, unsaturated fatty acids, differential scanning caloriemetry Y1 - 2012 UR - http://conferences.abiosus.org/abstract/show/391 SP - S. 93 ER - TY - CHAP A1 - Stollberg, Christian A1 - Schmidt, M. A1 - Namango, Saul A1 - Pohl, R. A1 - Ay, Peter T1 - Conditioning, Identification and Automatic Sorting of Plastic Automotive Parts for Productive Recycling T2 - International Automobile Recycling Congress, IARC 2002, Geneva, Switzerland, March 13 - 15, 2002, proceedings KW - automobile recycling Y1 - 2002 PB - ICM AG CY - Muri ER - TY - CHAP A1 - Ay, Peter A1 - Gaydardzhiev, Stoyan T1 - Surface charge studies - an important approach for investigation of color removal from textile waste water by chemical coagulation T2 - International seminar on mineral proceesing technology (MPT-2004), 19 - 21 February 2004 KW - coulor removal Y1 - 2003 SN - 81-7764-599-4 SP - 741 EP - 748 PB - Allied Publishers CY - New Delhi [u.a.] ER - TY - CHAP A1 - Gusovius, Hans-Jörg A1 - Ay, Peter A1 - Schmid, Hubert A1 - Müssig, Jörg ED - Önal, Güven T1 - New quantitative image analysis method for the characterization of mineral and fibrous materials T2 - Proceedings of the XXIII International Mineral Processing Congress, Istanbul, Turkey 3-8 September 2006, Vol. 1 KW - Fibre shape Y1 - 2006 SN - 975-7946-28-1 SP - 229 EP - 234 PB - Promed Advertising Agency CY - Istanbul ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Göttling, Sandra A1 - Ay, Peter T1 - Agglomeration of Lignin slugde as a technological innovative conversion for producing energy T2 - Extended abstracts, 1st International Conference on Materials for Energy, July 4 - 8, 2010, Convention Center Karlsruhe/Germany KW - Agglomeration Lignin sludge Y1 - 2010 SN - 978-3-89746-117-8 PB - DECHEMA CY - Frankfurt, M. ER - TY - CHAP A1 - Hildebrandt, Sven A1 - Ay, Peter A1 - Gusovius, Hans-Jörg T1 - Neuartige Verfahren zur angepassten Agglomeration von Naturfasern für den Einsatz in Verbundwerkstoffen T2 - TECHNOMER 2005, 19. Fachtagung über Verarbeitung und Anwendung von Polymeren, 10. - 12. November 2005, Chemnitz KW - Faseragglomaration Y1 - 2005 PB - Techn. Univ. CY - Chemnitz ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Logsch, Florian A1 - Ay, Peter T1 - Filtration resistance of the acid treated technical lignin granules and suspensions T2 - XXVII International Mineral Processing Congress, 20 - 24 October 2014, Chile, Santiago de Chile Y1 - 2014 SP - 206 EP - 213 ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Glaser, Claudia A1 - Gusovius, Hans-Jörg A1 - Ay, Peter T1 - Comparison of grinding and liberation processes for stalky biomass materials as a prerequisite for production of energy pellets with high calorific value T2 - XXV International Mineral Processing Congress, IMPC 2010, "Smarter processing for the future", Brisbane, Australia 6-10 September 2010, congress proceedings Y1 - 2010 SN - 978-1-921522-28-4 PB - AusIMM CY - Carlton South, Australia ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Brinker, Mona A1 - Ay, Peter T1 - Particle size distribution of communited and liberated cereal straws measured with different image analysis systems and their characteristic influence on mechanical pellets quality T2 - XXVI International Mineral Processing Congress - IMPC 2012 : New Delhi, India, September 24 - 28, 2012 Y1 - 2012 SN - 81-901714-3-7 PB - New Delhi ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Geldt, Elena A1 - Glaser, Claudia A1 - Ay, Peter T1 - Technical realization of the innovative roll-agglomeration of bast fibres in industrial scale T2 - XXVII International Mineral Processing Congress, 20 - 24 October 2014, Chile, Santiago de Chile Y1 - 2014 SP - 345 EP - 355 ER - TY - CHAP A1 - Markowski, Jens A1 - Narra, Satyanarayana A1 - Ay, Peter A1 - Hein, Christian A1 - Weber, Alfred T1 - Production of agglomerates from iron-containing fines from the ASR-recycling processes for its use in blast furnaces T2 - XXVI International Mineral Processing Congress - IMPC 2012 : New Delhi, India, September 24 - 28, 2012, vol. 1 N2 - The EU Directive 2000/53/EC on end-of life vehicles (ELVs) states that in 2015 at least 85 wt.-% of a vehicle has to be reused or recycled. This result in the obligatory need to separate additionally metallic and other components of the automotive shredder residues (ASR), so that they can be professionally prepared for recycling and reuse further. Currently the iron-containing fines of ASR are deposited as it is not possible to process in blast furnaces due to its particle size (< 4 mm), composition and material properties. Additionally problems are also caused in handling and transportation (dust) of the material. This work focuses mainly on the ASR materials utilization in blast furnaces. Material was further separated into two consecutive fractions by carrying out repeated crushing and magnetic separation twice. The two fractions have significantly higher iron content (up to 75 wt.-%) compared to the initial material mixture. The materials were assessed for their usage in blast furnaces based on the possible pelletisation with and without binders, stability of pellets, shape and size of pellets, etc. Pelletisation of the material was carried out with a single mould pellet press. Further lignite coal was added to the mixture as additive which improved the pelletisation behavior and the mechanical stability of pellets. Lignite coal was chosen as reducing agent in the blast furnace process contributing towards additional savings in energy supplied. The experiments reveal that the production of pellets from iron-containing fines is possible with a lignite coal admixture of about 15 wt.-%. These pellets displayed good mechanical stability and can be used in blast furnace processes in recovery of the recyclable metals which are currently not recycled. The recycling of not yet recyclable metals would reduce the deposition and can be easily adopted into the economic cycle by their utilization. KW - Automotive shredder residue KW - Fe-fines KW - Agglomeration Y1 - 2012 SN - 81-901714-3-7 CY - New Delhi ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Glaser, Claudia A1 - Gusovius, Hans-Jörg A1 - Ay, Peter T1 - Pelletisation of cereal straws as a source of energy after specific communition processes T2 - 18th European Biomass Conference and Exhibition, proceedings of the international conference held in Lyon, France, 3 - 7 May 2010 Y1 - 2010 SN - 978-88-89407-56-5 PB - ETA-Florence Renewable Energies CY - Florence ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Glaser, Claudia A1 - Ay, Peter T1 - Abrasion and strength of biomass pellets as main mechanical stability characteristics T2 - 19th European Biomass Conference and Exhibition, proceedings, ICC Berlin International Congress Center Berlin, Germany, conference 6 - 10 June 2011 Y1 - 2011 SN - 978-88-89407-55-7 PB - ETA-Florence Renewable Energies CY - Florence ER - TY - JOUR A1 - Nagel, Manfred A1 - Ay, Peter T1 - Dreidimensionale morphologische Untersuchung von Flocken JF - GIT Laborfachzeitschrift Y1 - 2001 SN - 0016-3538 VL - 45 IS - 6 SP - 656 EP - 658 ER - TY - THES A1 - Catalan Asenjo, Helena T1 - Entwicklung eines Cr6+-freien Titanaktivierungsverfahrens zur elektrochemischen Beschichtung KW - Titan KW - Metallischer Werkstoff KW - Beschichtung Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-4295 ER - TY - CHAP A1 - Dasgupta, Sunanda A1 - Ay, Peter T1 - In-situ monitoring and induction time measurements during melt crystallization of plant based fatty acid mixtures in V-form reactor T2 - 6th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry Karlsruhe, March 17–19, 2013 N2 - Enriched plant based unsaturated fatty acid mixtures are increasingly finding applications in various fields like those of production of bio-fuels and polymerization of epoxy resins. In the case of production of epoxy resins, they are highly advantageous due to the presence of multiple double bonds in the fatty acids which provide opportunities for cross linking by substitution. On the other hand, bio-fuels need raw materials with very low crystallization temperatures. This special property can also be attributed to these enriched unsaturated fractions due to their weak inter-molecular interactions owing to the kink in their structures. Melt crystallization has long been established as an optimal method for purification and enrichment of fractions from mixtures [1,2]. Previous studies have shown promising results with regard to enrichment of unsaturated fractions by melt crystallization processes [1]. Melt crystallization kinetics of two plant based poly-unsaturated fatty acid mixtures have been investigated in this study [3]. A high oleic and a high linoleic fatty acid mixture were chosen for comparison purposes. A V-form reactor was developed for optimal in-situ analysis with the help of the focused beam reflectance measurement (FBRM®, Mettler Toledo Ltd., Switzerland) instrument [3]. Enhanced heat transfer especially to deal with the heat given out during crystallization was enabled through minimal volume of sample, optimized mixing and the special shape of the reactor. Important parameters like induction time, mixing speed, etc have been determined and compared as functions of degree of supercooling and composition of PUFA mixtures. In accordance to theory, the induction times in both the cases decreased with increasing supercooling and mixer speed. On the other hand, the high linoleic fatty acid mixture required much higher supercooling (4.4K to 5.4K) than the high oleic mixture (2.2K to 3.2K) for favorable induction times. KW - FBRM, PUFA Y1 - 2013 UR - https://www.researchgate.net/publication/265109649_In-situ_monitoring_and_induction_time_measurements_during_melt_crystallization_of_plant_based_fatty_acid_mixtures_in_V-form_reactor PB - abiosus e.V. Conferences CY - Karlsruhe, Germany ER - TY - CHAP A1 - Klein, Robert A1 - Stollberg, Christian A1 - Markowski, Jens A1 - Willscher, S. A1 - Ay, Peter ED - Önal, Güven T1 - Biodissolution for recovery of precious metals from electronic scrap T2 - Proceedings of the XXIII International Mineral Processing Congress, Istanbul, Turkey 3-8 September 2006, Vol. 2 KW - biodissolution Y1 - 2006 SN - 975-7946-29-X SP - 1557 EP - 1560 PB - Promed Advertising Agency CY - Istanbul ER - TY - CHAP A1 - Klein, Robert A1 - Stollberg, Christian A1 - Markowski, Jens A1 - Willscher, S. A1 - Ay, Peter T1 - Recovery of metals from circuit boards with biodissolution T2 - 10th Conference on Environment and Mineral Processing, 22.6.-24.6.2006, VB-TU Ostrava, Czech Republic KW - biodissolution Y1 - 2006 PB - Technical University of Ostrava CY - Ostrava ER - TY - CHAP A1 - Stollberg, Christian A1 - Pempel, Harry A1 - Schwabe, M. A1 - Peter, Ay T1 - Automatische Sortierung und Möglichkeiten der Verwertung von Kunststoffen aus dem Altfahrzeugbereich T2 - TECHNOMER 2005, 19. Fachtagung über Verarbeitung und Anwendung von Polymeren, 10. - 12. November 2005, Chemnitz KW - Kunststoffrecycling Y1 - 2005 PB - Techn. Univ. CY - Chemnitz ER - TY - CHAP A1 - Narra, Satyanarayana A1 - Logsch, Florian A1 - Glaser, Claudia A1 - Ay, Peter T1 - Sludge-pelleting of paper and pulp residues T2 - XXVI International Mineral Processing Congress - IMPC 2012, New Delhi, India, September 24 - 28, 2012 Y1 - 2012 SN - 81-901714-3-7 SP - 03723 EP - 03739 CY - New Dehli ER - TY - CHAP A1 - Markowski, Jens A1 - Logsch, Florian A1 - Ay, Peter A1 - Kanthak, Manfred A1 - Müller, Bodo T1 - Recycling of non-ferrous metals, precious metals and rare earth metals from MSW T2 - Proceedings, XXVII. IMPC, Santiago de Chile, 2014 N2 - Presently the global commodity situation for non ferrous-, precious- and rare metals is characterized by a strong increase in onsumption and a simultaneous shortage of materials derived from primary sources. So the use of secondary raw materials gains is important due to economic and ecological reasons. Non Ferrous-, precious- and rare earth metals were detected in household waste (Municipal solid waste, MSW) for years. In MSW-treatments plants NF-metals are actually mostly separated from dried fractions. The separation of these metals is carried out with the aim of removing particles which disrupt further processing. A selective enrichment of individual non-ferrous metals has not been carried out previously. The separated fractions contain mixtures of Al, Cu, Zn, Pb, Sn, alloys, precious metals (e. g. Au, Ag, Pt) and rare metals (Ga, In, Nd etc.) along with considerable amounts of contaminations. The R&D project “NE-Rec” selectively processes the coarsely separated non-ferrous-metal-conglomerates increasing the concentration of targeted metals. Metals and metal mixtures are concentrated by sorting steps and the impurities are discharged from the process. Still contaminated precious metals are then subjected to a wet-chemical treatment. So metals can be specifically brought into solution or can be precipitated to separate unwanted components (inerts, polymers, foreign metals). Further the relevant metals will be concentrated by thermal-metallurgical processes. The technology, developed in the R&D project, enables identification, separation and processing of non-ferrous metals, precious metals and REM in household waste and transfers them into further processable individual fractions. KW - Recycling KW - NF metals Y1 - 2014 SP - 237 EP - 245 PB - GECAMIN CY - Santiago de Chile ER - TY - GEN A1 - Gaydardzhiev, Stoyan A1 - Ay, Peter T1 - Evaluation of dispersant efficiencfor aqueous alumina slurries by concurrent rechniques T2 - Journal of Dispersion Science and Technology KW - alumina slurries Y1 - 2006 SN - 1532-2351 SN - 0193-2691 VL - 27 IS - 3 SP - 413 EP - 417 ER - TY - RPRT A1 - Narra, Satyanarayana A1 - Ay, Peter A1 - Markowski, Jens A1 - Glaser, Claudia T1 - Grundlagenuntersuchungen: Innovative Makroverkapselung von Gärresten Y1 - 2014 UR - http://www.fnr-server.de/ftp/pdf/berichte/22402712.pdf PB - BTU, LS Aufbereitungstechnik CY - Cottbus ER - TY - THES A1 - Thümmler, Philipp T1 - Beschreibung der Vorgänge beim Ultraschallkugelstrahlen unter Berücksichtigung der Strahlintensität und der Kugelbewegungen bei Parameteränderungen KW - Ultraschall KW - Kugelstrahlen KW - Verfahrenstechnik Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-6013 ER - TY - GEN A1 - Hildebrandt, Sven A1 - Ay, Peter A1 - Gusovius, Hans-Jörg T1 - Ersatz von Glasfasern T2 - KunststoffMagazin KW - Naturfasern Y1 - 2004 IS - 9 ER - TY - PAT A1 - Ay, Peter A1 - Narra, Satyanarayana A1 - Glaser, Claudia T1 - System zur Rollagglomeration mit integrierter Entwässerung KW - Rollagglomeration Y1 - 2013 ER - TY - CHAP A1 - Stollberg, Christian A1 - Pempel, Harry A1 - Gärtig, T. A1 - Ay, Peter T1 - Automatische Sortierung und mögliche Wege der Wiederverwertung von Kunststoffen aus dem Altfahrzeugbereich T2 - Integrative Strategien für eine nachhaltige Abfallwirtschaft : Auswirkungen der EU-Politik auf Baden-Württemberg KW - Altfahrzeuge KW - Kunststoffrecycling Y1 - 2004 SN - 3-486-63063-6 SP - 40 EP - 44 PB - Oldenbourg-Industrieverlag CY - Essen [u.a.] ER - TY - GEN A1 - Hildebrandt, Sven A1 - Peter, Ay T1 - Rollagglomeration und Wickelverfahren - Durchbruch in der Langfaseraufbereitung nachwachsender Rohstoffe T2 - Forum der Forschung KW - Faseraufbereitung, Agglomeration, Bastfasern Y1 - 2004 SN - 0947-6989 VL - 8 IS - 17 SP - 106 EP - 111 ER - TY - RPRT A1 - Narra, Satyanarayana A1 - Ay, Peter T1 - LignoBioFuel : Entwicklung eines Verfahrens zur Herstellung von stofflich und energetisch nutzbaren Bioagglomeraten auf der Basis von Lignin : Endbericht - Zeitraum 01.07.2011 bis 28.02.2014 Y1 - 2014 U6 - https://doi.org/10.13140/RG.2.1.3617.7445 PB - BTU, Lehrstuhl Aufbereitungstechnik CY - Cottbus ER - TY - PAT A1 - Ay, Peter A1 - Perwin, Jörg A1 - Gusovius, Hans-Jörg A1 - Hildebrandt, Sven T1 - Method and device for the continuous production of fiber agglomerate N2 - The invention relates to a method and device for the continuous production of fiber agglomerates by rolling agglomeration. For the production of an agglomerate, a portion of the fiber material is introduced into a ring-shape roller table which closed on all sides except for an input opening an an output opening. The fiber material portion introduced into the roller table is transported through the roller table by means of a relative movement of two surfaces of the roller table toward each other, the surfaces lying opposite each other. The fiber material is compressed in the roller table and finally discharged from an output opening of the roller table as fiber agglomerate. According to the invitation, the portioning of the fiber material is carried out by the pulling of an amount of fibers out of a stock of corresponding fiber materials is provided on a supply table for each input opening of a roller table, and portions are continously pulled out of said stock by the repeated movement through the sock of carrier means of a pulling device designed therefor and released into the roller table. KW - roller table, rollagglomeration, fiber agglomeration Y1 - 2008 ER - TY - GEN A1 - Narra, Satyanarayana A1 - Bhandari, Prem A1 - Glaser, Claudia A1 - Bischof, Heike A1 - Busch, Günter T1 - Pelletisation of biogas residues with pelleting disks T2 - 19th European Biomass Conference and Exhibition, ICC Berlin, International Congress Center Berlin, Germany, conference 6 - 10 June 2011, exhibition 6 - 9 June 2011, proceedings KW - Residues pelletisation Y1 - 2011 PB - ETA-Florence Renewable Energies CY - Florence ER - TY - GEN A1 - Narra, Satyanarayana A1 - Bhandari, Prem A1 - Glaser, C. A1 - Bischof, Heike A1 - Busch, Günter T1 - Pelletisation of Biogas Residues with Pelleting Discs Y1 - 2011 SN - 978-88-89407-55-4 N1 - Proceedings, 19th European Biomass Conference and Exhibition, Berlin 2011 SP - 1937 PB - ETA-Florence Renewable Energies CY - Florence ER - TY - THES A1 - Narra, Satyanarayana T1 - Processing and refinement of biogenous residues from agricultural, industrial and biotechnological processes Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-29558 ER - TY - GEN A1 - Kamm, Birgit A1 - Schneider, Bernd Uwe A1 - Hüttl, Reinhard F. A1 - Grünewald, Holger A1 - Gusovius, Hans-Jörg A1 - Stollberg, Christian A1 - Ay, Peter A1 - Kamm, Michael T1 - Lignocellulosic feedstock biorefinery - combination of technologies of agroforestry and a biobased substance an energy economy T2 - Forum der Forschung KW - biorefinery Y1 - 2006 SN - 0947-6989 IS - 19 SP - 53 EP - 62 ER - TY - THES A1 - Gaydardzhiev, Stoyan T1 - Upon the characterization of destabilization and stabilization phenomena in fine particulate systems - implications to physicochemical removal of colour from effluents and colloidal processing of ceramics KW - Keramik KW - Farbstoff Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-3471 ER - TY - GEN A1 - Gaydardzhiev, Stoyan A1 - Gusovius, Hans-Jörg A1 - Wilker, Viola A1 - Ay, Peter T1 - Gel-casted porous Al2O3 ceramics by use of natural fibres as pore developers T2 - Journal of Porous Materials KW - Gel-casting Y1 - 2008 SN - 1573-4854 SN - 1380-2224 VL - 15 IS - 4 SP - 475 EP - 480 ER - TY - GEN A1 - Gaydardzhiev, Stoyan A1 - Karthikeyan, J. A1 - Ay, Peter T1 - Progression of surface charge and floc charakterization during colour removal from solution by coagulation T2 - Environmental Technology KW - coulor removal Y1 - 2006 SN - 1479-487X VL - 27 IS - 2 SP - 193 EP - 199 ER - TY - GEN A1 - Gaydardzhiev, Stoyan A1 - Wilker, Viola A1 - Scheffler, Michael T1 - Dip-coating of fibrous natural materials for alumina tube manufacturing T2 - Advanced Engineering Materials KW - natural fibres Y1 - 2008 SN - 1527-2648 SN - 1438-1656 VL - 10 IS - 3 SP - 223 EP - 226 ER - TY - GEN A1 - Singh, Bimal P. A1 - Gaydardzhiev, Stoyan A1 - Ay, Peter T1 - Stabilization of aqueous silicon nitride suspension with Dolapix A 88 T2 - Journal of Dispersion Science and Technology KW - Flocculation Y1 - 2006 SN - 1532-2351 SN - 0193-2691 VL - 27 IS - 1 SP - 91 EP - 97 ER - TY - GEN A1 - Gaydardzhiev, Stoyan A1 - Ay, Peter T1 - Characterisation of aqueous suspensions of fumed aluminium oxide in presence of two Dolapix dispersants T2 - Journal of Materials Science KW - coulor removal Y1 - 2006 SN - 0022-2461 SN - 1573-4803 VL - 41 IS - 16 SP - 5257 EP - 5262 ER - TY - GEN A1 - Walaszek, Wiktoria A1 - Ay, Peter T1 - Extended interpretation of structured attributes of pellet-flocs in pelleting flocculation T2 - Minerals Engineering KW - pelleting flocculation Y1 - 2006 SN - 0892-6875 VL - 19 IS - 13 SP - 1397 EP - 1400 ER - TY - GEN A1 - Walaszek, Wiktoria A1 - Ay, Peter T1 - Porosity and interior structure analysis of pellet flocs T2 - Colloids and Surfaces A: Physicochemical and Engineering Aspects KW - pellet flocs Y1 - 2006 SN - 0927-7757 VL - 280 IS - 1-3 SP - 155 EP - 162 ER - TY - JOUR A1 - Besra, Laxmidhar A1 - Sengupta, Dilip A1 - Roy, S. A1 - Ay, Peter T1 - Polymer adsorption: its correlation with flocculation and dewatering of kaolin Suspension in the presence and absence of surfactant" KW - Flocculation KW - Dewatering KW - Polymer KW - Surfactant Y1 - 2002 ER - TY - JOUR A1 - Besra, Laxmidhar A1 - Sengupta, Dilip A1 - Roy, S. A1 - Ay, Peter T1 - Flocculation and dewatering of kaolin suspensions in the presence of polyacrylamide and surfactant KW - Flocculation KW - Dewatering KW - Polymer KW - Surfactant Y1 - 2002 ER - TY - GEN A1 - Besra, Laxmidhar A1 - Ay, Peter T1 - Flocculation and dewatering of kaolin suspensions with the help of a combination of polymeric flocculants and surface active substances T2 - Forum der Forschung KW - Flocculation Y1 - 1999 SN - 0947-6989 VL - 4 IS - 9 SP - 68 EP - 74 ER - TY - GEN A1 - Walaszek, Wiktoria A1 - Ay, Peter T1 - Pelleting flocculation - an alternitive technique to optimise sludge conditioning T2 - International journal of mineral processing KW - pelleting flocculation Y1 - 2005 VL - 76 IS - 3 SP - 173 EP - 180 ER -