@inproceedings{NarraLogschGlaseretal., author = {Narra, Satyanarayana and Logsch, Florian and Glaser, Claudia and Ay, Peter}, title = {Sludge-pelleting of paper and pulp residues}, series = {XXVI International Mineral Processing Congress - IMPC 2012, New Delhi, India, September 24 - 28, 2012}, booktitle = {XXVI International Mineral Processing Congress - IMPC 2012, New Delhi, India, September 24 - 28, 2012}, address = {New Dehli}, isbn = {81-901714-3-7}, pages = {03723 -- 03739}, language = {en} } @misc{AyNarraGlaser, author = {Ay, Peter and Narra, Satyanarayana and Glaser, Claudia}, title = {Vorrichtung zur Herstellung von Agglomeraten}, abstract = {Die Erfindung betrifft eine Rollagglomerations-Vorrichtung zur Herstellung von Agglomeraten aus einem Feststoff-F{\"u}ssigkeitsgemisch. Die Vorrichtung weist ein Transportmittel zum Transport eines Feststoff-Fl{\"u}ssigkeitsgemisches in Richtung der L{\"a}ngsachse des Transportmittles und ein Pressmittel auf, welches so zum Transportmittel beabstandet angeordnet ist, dass ein Pressmittel auf das auf der Auflagefl{\"a}che des Transportmittels befindlichen Feststoff-Fl{\"u}ssigkeitsgemisches einen Druck aus{\"u}ben kann, wobei das Transportmittle oder das Pressmittel quer zur L{\"a}ngsachse des Transportmittels bewegbar sind.}, language = {de} } @misc{NarraGlaserAy, author = {Narra, Satyanarayana and Glaser, Claudia and Ay, Peter}, title = {Verfahren zur Herstellung von Langzeitd{\"u}nger aus G{\"a}rresten mittels Verkapselung}, abstract = {Die Erfindung betrifft ein Verfahren zur Herstellung von D{\"u}nger aus G{\"a}rresten, wobei die Inhaltsstoffe aus den enthaltenen Zubereitungen lang anhaltend freigesetzt werden.}, language = {de} } @misc{NarraGlaserAyetal., author = {Narra, Satyanarayana and Glaser, Claudia and Ay, Peter and Logsch, Florian}, title = {Verfahren zur Herstellung von wasserunl{\"o}slichen Lignin-Agglomeraten}, abstract = {Die Erfindung betrifft ein Verfahren zur Herstellung von wasserunl{\"o}slichen Agglomeraten aus Ablauge eines Cellulosegewinnungsprozesses. Erfindungsgem{\"a}ß umfasst das Verfahren die folgenden Schritte: 1. Durchf{\"u}hrung einer Granulation mit der Ablauge zur Erzeugung von Lignin-Agglomeraten und 2. Behandeln der erzeugten Lignin-Agglomerate mit einer S{\"a}ure.}, language = {de} } @inproceedings{NarraGlaserBrinkeretal., author = {Narra, Satyanarayana and Glaser, Claudia and Brinker, Mona and Bednarek, R. and Gusovius, Hans-J{\"o}rg and Ay, Peter}, title = {Vergleich verschiedener Bildanalysesysteme zur Bestimmung der Partikelgr{\"o}ßenverteilung von zerkleinertem Stroh und deren charakteristischer Einfluss auf Stabilit{\"a}t und Festigkeit von Biomassepellets}, series = {Aufbereitung und Recycling, 10. und 11. November 2010, Freiberg, Jahrestagung der UVR e.V. und FIA e.v.}, booktitle = {Aufbereitung und Recycling, 10. und 11. November 2010, Freiberg, Jahrestagung der UVR e.V. und FIA e.v.}, address = {Freiberg}, pages = {S. 35}, language = {de} } @misc{NarraBhandariGlaseretal., author = {Narra, Satyanarayana and Bhandari, Prem and Glaser, Claudia and Bischof, Heike and Busch, G{\"u}nter}, title = {Pelletisation of biogas residues with pelleting disks}, series = {19th European Biomass Conference and Exhibition, ICC Berlin, International Congress Center Berlin, Germany, conference 6 - 10 June 2011, exhibition 6 - 9 June 2011, proceedings}, journal = {19th European Biomass Conference and Exhibition, ICC Berlin, International Congress Center Berlin, Germany, conference 6 - 10 June 2011, exhibition 6 - 9 June 2011, proceedings}, publisher = {ETA-Florence Renewable Energies}, address = {Florence}, language = {en} } @misc{AyNarraGlaser, author = {Ay, Peter and Narra, Satyanarayana and Glaser, Claudia}, title = {System zur Rollagglomeration mit integrierter Entw{\"a}sserung}, language = {de} } @inproceedings{NarraGlaserGusoviusetal., author = {Narra, Satyanarayana and Glaser, Claudia and Gusovius, Hans-J{\"o}rg and Stollberg, Christian and Ay, Peter}, title = {Agricultural residues as a renewable source of bio-Energy with special focus on cereal straws}, series = {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}, booktitle = {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}, editor = {Zaikov, Gennadij E.}, publisher = {Nova Science Publ.}, address = {New York}, isbn = {978-1-61209-521-9}, pages = {67 -- 80}, language = {en} } @inproceedings{NarraGoettlingAy, author = {Narra, Satyanarayana and G{\"o}ttling, Sandra and Ay, Peter}, title = {Agglomeration of Lignin slugde as a technological innovative conversion for producing energy}, series = {Extended abstracts, 1st International Conference on Materials for Energy, July 4 - 8, 2010, Convention Center Karlsruhe/Germany}, booktitle = {Extended abstracts, 1st International Conference on Materials for Energy, July 4 - 8, 2010, Convention Center Karlsruhe/Germany}, publisher = {DECHEMA}, address = {Frankfurt, M.}, isbn = {978-3-89746-117-8}, language = {en} } @misc{OyegbileAyNarra, author = {Oyegbile, Benjamin and Ay, Peter and Narra, Satyanarayana}, title = {Optimisation of micro-processes for shear-assisted solid-liquid separation in a rotatory batch flow vortex reactor}, series = {Journal of Water Reuse and Desalination}, volume = {6}, journal = {Journal of Water Reuse and Desalination}, number = {1}, doi = {10.2166/wrd.2015.057}, pages = {125 -- 136}, abstract = {This paper reports the study of micro-processes in a novel pre-treatment technique using a pellet forming batch flow vortex reactor of cylindrical shape that consists of axially revolving rotor plates between fixed stator plates. The suspension was first mixed with high molecular weight synthetic polymers by stirring for approximately 50 seconds and then agitated for 20 minutes. The process was optimised for a number of operating conditions including polymer type and dosing regimen, rotation speed, wall-plate gap distance, residence time and suspension filling method. The results of the investigation show that optimising a number of process variables that influence floc formation and growth, along with specific apparatus construction and geometry, help to maintain the suspension in a metastable state that is crucial for the formation of pellet-like compact agglomerates with better dewaterability and uniform aggregate size. A maximum dry solids content of 28.3\% after gravity dewatering through a 0.5 mm sieve was recorded during the investigation, with a maximum particle removal efficiency of 97.5\%.}, language = {en} } @inproceedings{AyGlaserLogschetal., author = {Ay, Peter and Glaser, Claudia and Logsch, Florian and Narra, Satyanarayana and Gemende, Bernhard and Gerbeth, Anja and Riedel, Tobias and Pausch, Nicole and Leiker, Matthias and B{\"a}de, Bianka and Heiduschke, Rene}, title = {Micro-structured Iron (III) hydroxide agglomerates with high porosity as adsorbents}, series = {Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016), September 11-15, 2016, Qu{\´e}bec City, Canadian Institute of Mining, Metallurgy and Petroleum}, booktitle = {Proceedings of the XXVIII International Mineral Processing Congress (IMPC 2016), September 11-15, 2016, Qu{\´e}bec City, Canadian Institute of Mining, Metallurgy and Petroleum}, isbn = {978-1-926872-29-2}, pages = {Paper 263}, abstract = {This study focusses on the production of micro-structured agglomerates with high porosity from iron (III)-hydroxide-containing materials as adsorbent. A fractal structure of the agglomerates was created through a two-stage agglomeration process. Developing porous structures was necessary to increase the adsorption capacity. Various materials were used for the agglomeration experiments: i) filter cake (dry matter content 23 to 27 wt.-\%); ii) FerroSorp®DGμ, a product which is already being used commercially for various applications in water cleaning. These materials in the pristine state have different characteristics such as dry matter content and particle size distribution. The desired optimised agglomerates can be achieved with the help of additives or binders, respectively. Additionally, the agglomeration process parameters play a vital role. In order to produce agglomerates with high porosity, the process was carried out in two steps. Firstly, FerroSorp®DGμ (d90 < 30 µm) was agglomerated jointly with the aforementioned filter cake in an Eirich intensive mixer (particle size range 125 µm < d90 < 500 µm). The second agglomeration step post drying was carried out in a pelletisation disc or in an Eirich intensive mixer with the addition of polymeric binders (up to particle sizes ranging from 2 to 4 mm). Agglomerates were characterised both in short and long term loading tests using phosphate as model ion. Contact times were less than 10 min, similar to practical application in percolation columns, or more than 7 days, respectively. The results show that the agglomerates produced in the two-stage pelletisation process have more advantageous properties like better accessibility of the active sites obtained by specificly influencing the particle size distribution during the two-stage pelletisation process.}, language = {en} } @incollection{StockBensHelbachetal., author = {Stock, Oliver and Bens, Oliver and Helbach, Christoph and Narra, Satyanarayana and Downes, Nigel K. and H{\"u}ttl, Reinhard F. and Raab, Thomas}, title = {Bodenphysikalische, wachstumskundliche und rechtliche Aspekte der Melioration stark toniger Kippsubstrate mit REA-Gips}, series = {Neue Ans{\"a}tze in der land- und forstwirtschaftlichen Rekultivierung}, booktitle = {Neue Ans{\"a}tze in der land- und forstwirtschaftlichen Rekultivierung}, editor = {H{\"u}ttl, Reinhard F. and Schneider, Bernd Uwe}, publisher = {BTU}, address = {Cottbus}, isbn = {978-3-937728-06-3}, pages = {45 -- 77}, language = {de} } @phdthesis{Narra, author = {Narra, Satyanarayana}, title = {Structural amelioration of clay-sand substrate using FGD Gypsum as a substitute for Lime in recultivation of virgin soil at post-mining field Nochten (Lusatia) under soil physical and plant growth aspects}, publisher = {BTU}, address = {Cottbus}, isbn = {3-937728-11-2}, pages = {XVII, 143}, language = {en} }