TY - GEN A1 - Otto, Pascal A1 - Abendroth, Christian A1 - Dornack, Christina T1 - Designer-Mikrobiome für den Biogassektor T2 - Müll und Abfall N2 - Das Institut für Abfall- und Kreislaufwirtschaft (IAK) der TU Dresden ist am von der Europäischen Union im Rahmen des H2020-Programms geförderten Projekts "Micro4Biogas" beteiligt. Ziel des Projektes ist es, zur Unterstützung und Modernisierung des Biogassektors in den EU-Ländern beizutragen. Im Mittelpunkt stehen die Untersuchung der anaeroben Vergärung und des Mikrobioms, welche trotz jahrzehntelanger Forschung nicht ausreichend entschlüsselt sind. Obwohl das Wissen über die beteiligten Mikroorganismen zunimmt, wird das Mikrobiom nach wie vor als "Black Box" betrachtet. Im Rahmen von Micro4Biogas erfolgt die Charakterisierung natürlicher mikrobieller Gemeinschaften sowie die Erforschung neuer synthetischer mikrobieller Gemeinschaften. Darauf aufbauend erfolgt die Entwicklung von Strategien zur gezielten Beeinflussung des Mikrobioms (Bioaugmentation), die dazu dienen, den Prozess robuster, schneller, produktiver und standardisierter zu gestalten. Das bestehende und generierte Fachwissen wird in einer frei verfügbaren Roadmap zusammengefasst. Die Roadmap soll zudem Leitlinien und Handlungsempfehlungen für Industrie und Politik zur nachhaltigen und optimierten Produktion von Biogas enthalten. N2 - The institute of Waste Management and Circular Economy (IAK) is involved in the project "Micro4Biogas". This project is funded by the European Union under the H2020 programme and aims to contribute to the strengthening and modernisation of the biogas sector in the European Union. The focus is on the study of anaerobic digestion and the microbiome, which have not been sufficiently understood despite decades of research. Although knowledge about the involved microorganisms is increasing, the microbiome is still considered a "black box". Within the framework of Micro4Biogas, the characterization of natural microbial communities as well as the exploration of new synthetic microbial communities takes place. Based on this, strategies will be developed to specifically influence the microbiome (bioaugmentation), which will enable the process to become more robust, faster, more productive and more standardised. The existing and generated expertise will be summarised in a freely accessible roadmap. This also includes recommendations on how industry and politics can act to produce biogas in a sustainable and optimised way. KW - Biogas Y1 - 2022 UR - https://muellundabfall.de/ce/designer-mikrobiome-fuer-den-biogassektor/detail.html U6 - https://doi.org/10.37307/j.1863-9763.2022.05.05 SN - 1863-9763 VL - 54 IS - 05 SP - 243 EP - 247 ER - TY - GEN A1 - Oviedo-Ocaña, Edgar Ricardo A1 - Abendroth, Christian A1 - Dominguez Rivera, Isabel Cristina A1 - Sánchez Ferrer, Antoni A1 - Dornack, Christina T1 - Life cycle assessment of biowaste and green waste composting systems: A review of applications and implementation challenges T2 - Waste Management N2 - Composting is one of the most widely applied methods for recycling organic waste. This process has been proposed as one option that facilitates the reincorporation of materials into the production cycle. However, composting also generates environmental impacts. Life Cycle Assessment (LCA) is the most common approach to evaluate the environmental impacts of a process at different system stages. Nevertheless, applying LCA in composting facilities is challenging due to the extensive information required, the lack of standardization on the initial assumptions, the definition of system boundaries, and the high diversity of existing composting technologies. This paper systematically reviews LCA studies in biowaste and/or green waste composting. The study highlights the challenges that should be met in order to improving the application of LCA to evaluate the environmental impacts of this type or waste treatment strategy. The review protocol used identified 456 papers published between 2010 and 2022. After the screening, 56 papers were selected, read, and thoroughly analyzed. The results show that: i) about 68% of the studies aimed to compare composting with other solid waste management options; ii) there was a wide diversity among the impact categories considered, which predominantly included climate change and ozone depletion; iii) there was no consensus on the functional unit or the system boundaries; iv) the main gaseous emissions studied were ammonia, methane, and nitrogen oxide, which were generally determined by emission factors; v) the avoided environmental impacts associated with the end-product quality and its application as an organic amendment or soil improver were ignored. This work demonstrates the complexity of conducting credible and valid composting LCA studies and proposes seven recommendations for improving the application of this assessment methodology to analyze this waste management alternative. KW - Biowaste KW - Life Cycle Assessment KW - Composting KW - Environmental impact KW - Green waste Y1 - 2023 UR - https://www.sciencedirect.com/science/article/pii/S0956053X23005688 U6 - https://doi.org/10.1016/j.wasman.2023.09.004 SN - 1879-2456 SN - 0956-053X VL - 171 SP - 350 EP - 364 ER - TY - GEN A1 - Abendroth, Christian A1 - Dornack, Christina A1 - Nefigmann, Sven A1 - Otto, Pascal ED - Nelles, Michael T1 - Mikroskopische Helden der Biogasbranche T2 - Tagungsband zum 20. Dialog Abfallwirtschaft und zum 16. Rostocker Bioenergieforum N2 - Das Streben nach umweltfreundlicher Energie und Wertstoffen hat in den letzten Jahren, gestärkt durch Wirtschaft und Politik, den Drang nach Innovation erheblich angeregt. Dieser Entwicklungsdrang findet sich in vielen Bereichen wieder, unter anderem in der Bioökonomie und hier auch bei Biogasanlagen. Das Schlagwort „Mikrobiom“ ist im medizinischen Bereich bereits weit verbreitet und wird im populärwissenschaftlichen Bereich in zahlreichen Büchern diskutiert. Dies unterstreicht das große gesellschaftliche Interesse an diesem Thema. Neben diesen Erkenntnissen gewinnt das Mikrobiom im Bereich der Bioenergien zunehmend an Bedeutung. In den letzten Jahren sind in hochrangigen, internationalen Fachjournalen zahlreichen Artikel erschienen, welche aufzeigen, dass Biogasanlagen wahre Superhelden unter den Mikroorganismen beherbergen. Die hohe Diversität wurde bereits in zahlreichen Publikationen diskutiert. Trotz dessen wird das Mikrobiom als „Blackbox“ betrachtet. Wissenschaftler weltweit versuchen diese Blackbox aufzulösen und hierbei traten einige Überraschungen auf. Dieses neue Wissen könnte den Grundstein für neue Konzepte der Prozesssteuerung legen. Ziel der vorliegenden Arbeit ist in diesem Zusammenhang eine Kurzübersicht über mikrobielle Innovation im Zusammenhang mit anaeroben Mikrobiomen. KW - Biogas, Mikrobiome Y1 - 2022 UR - https://bioenergieforum.auf.uni-rostock.de SN - 978-3-86009-535-5 U6 - https://doi.org/10.18453/rosdok_id00003615 SP - 233 EP - 241 CY - Rostock ER - TY - GEN A1 - Abendroth, Christian T1 - Zirkuläre Mikrobiome für Recycling- und Rückgewinnungsanwendungen T2 - Werkstoffe in der Fertigung N2 - Der Artikel stellt das Fachgebiet der Kreislaufwirtschaft an der BTU vor. Forschungsthemen des Fachgebietes werden kurz erläutert. Diese umfassen Biolaugung zur Behandlung von Leiterplatten, anaerobe Fermentation als Multiproduktplattform, Power2Gas Prozesse sowie das Verständnis mikrobieller Gemeinschaften mit Bedeutung für die Kreislaufwirtschaft. KW - Biogas KW - Mikrobiome KW - Power2Gas KW - Biolaugung Y1 - 2024 UR - https://werkstoffzeitschrift.de/werkstoffzeitschrift/ SN - 0939-2629 IS - 1 SP - 27 EP - 28 ER - TY - GEN A1 - Alipoursarbani, Mozhdeh A1 - Abendroth, Christian ED - Bockreis, Anke ED - Faulstich, Martin ED - Flamme, Sabine ED - Kranert, Martin ED - Mocker, Mario ED - Nelles, Michael ED - Quicker, Peter ED - Rettenberger, Gerhard ED - Rotter, Vera Susanne T1 - Aerobic Digestate Reactivation of Anaerobically Digested Sewage Sludge – A Micro Review T2 - Kreislauf und Ressourcenwirtschaft : 13.Wissenschaftskongress : am 15. und 16. Februar 2024 an der Technischen Universität Wien N2 - The authors of the present work summarize their recently published article “Microbiome Characterization after Aerobic Digestate Reactivation of Anaerobically Digested Sewage Sludge” from Otto et al. (2023). This article presents the outcomes of a municipal-scale demonstrator plant implementing a recently patented process for improved sludge degradation within a municipal sewage treatment system. The study focused on a 1500 m³ sewage sludge digester, where an intermediate aerobic sewage sludge reactivation stage was introduced. This reactivation resulted in a 55% increase in biogas production and a 25% reduction in residual solids. For the residual NH4 in the liquid phase of the sewage sludge, the process achieved NH4-N removal rates exceeding 90%. To gain insights into the microbial community dynamics, 16S rRNA gene amplicon high-throughput sequencing was employed on the reactivated digestate. The analysis revealed a reduced population of methane-forming archaea compared to the primary digester, along with the detection of multiple ammonium-oxidizing bacteria. Notably, genera within the Chitinophagaceae family, comprising up to 18.8% of DNA sequences, were prevalent, alongside a small presence of Candidatus nitrosoglobus (<0.3%). The study highlights an economically viable approach for efficient nitrogen removal from sewage sludge while simultaneously increasing biogas yields and reducing potential pathogens in the residual material. KW - Biogas KW - Mikrobiome KW - Sewage Sludge Y1 - 2024 SN - 978-3-99106-120-5 U6 - https://doi.org/10.15203/99106-120-5 SP - 177 EP - 180 PB - Innsbruck university press CY - Innsbruck ER - TY - GEN A1 - Jansen, Nils A1 - Abendroth, Christian ED - Bockreis, Anke ED - Faulstich, Martin ED - Flamme, Sabine ED - Kranert, Martin ED - Mocker, Mario ED - Nelles, Michael ED - Quicker, Peter ED - Rettenberger, Gerhard ED - Rotter, Vera Susanne T1 - Unveiling the Biochar Potential: Lowering Greenhouse Gas Emissions across the Biogas Supply Chain T2 - Kreislauf und Ressourcenwirtschaft : 13.Wissenschaftskongress : am 15. und 16. Februar 2024 an der Technischen Universität Wien, Tagungsband N2 - The carbon-rich material known as biochar is the product of pyrolysis – a thermochemical conversion of biomass in the absence of oxygen. Given its characteristics, including long-term stability and sorption capacity, biochar has received increasing attention as a promising tool for addressing climate change and enhancing the production of biogas. This work combines both functions by examining, through different application scenarios, the potential role of biochar in mitigating greenhouse gas (GHG) emissions across the biogas supply chain. The wood-derived and high pyrolyzed biochar CarboFerm® was used as an example biochar for application in four different scenarios: (1) Application to soil without fertilizer, (2) application to soil with fertilizer, (3) application to biogas fermenter, (4) application to digestate treatment. The GHG mitigation was calculated by applying the methodology of the Renewable Energy Directive II (RED II). The scenario comparison resulted in GHG mitigation effectiveness of 0.03, 0.01, 0.06, and 0.03 g CO2eq / MJ biogas / t biochar, respectively. Thus, this study recommends using biochar in biogas fermenters and subsequently applying the biochar-enriched digestate to agricultural soil to reduce GHG emissions from biogas production. Furthermore, it is suggested that the mitigation potential of biochar may not be fully recognized in the RED, potentially resulting in an underestimation of its effectiveness. Y1 - 2024 SN - 978-3-99106-120-5 U6 - https://doi.org/10.15203/99106-120-5 SP - 279 EP - 286 PB - Innsbruck university press CY - Innsbruck ER - TY - GEN A1 - Baptist, Savannah A1 - Abendroth, Christian ED - Bockreis, Anke ED - Faulstich, Martin ED - Flamme, Sabine ED - Kranert, Martin ED - Mocker, Mario ED - Nelles, Michael ED - Quicker, Peter ED - Rettenberger, Gerhard ED - Rotter, Vera Susanne T1 - A systematic review on Carbon Credits T2 - 12. Wissenschaftskongress Abfall- und Ressourcenwirtschaft am 9. und 10. März 2023, Technischen Universität Hamburg, Tagungsband N2 - In the last 20 years there has been a growing need for climate mitigation strategies. Starting with the Emission Trading in the Kyoto protocol in 1997, the concept of a carbon market arose. Carbon markets opened an avenue giving countries and businesses an opportunity to trade their emissions as a commodity. The Paris agreement has further acted as an incentive. This led to the introduction of the Carbon Credit. A single carbon credit has been defined as one ton of equivalent CO2, strategies to calculate a baseline for emissions and crediting systems followed. However, currently we still lack a universal method of estimation. There have been efforts by the UNFCCC’s clean development mechanism, IPCC and the private sector to develop calculation mechanisms. Despite this, there have been issues in the credibility of these credits. With the Introduction of the non-compliance market there has been a growth of carbon credits in the voluntary markets. This leads to the basic question: Do scientific articles give insight into the existing carbon credit market? The presented study aims to answer the question, using the PSALSA method of systematic review analysis. KW - Carbon Credits Y1 - 2023 UR - https://www.uibk.ac.at/iup/buch_pdfs/10.15203-99106-095-6.pdf SN - 978-3-99106-095-6 U6 - https://doi.org/10.15203/99106-095-6 SP - 179 EP - 184 PB - Innsbruck university press CY - Innsbruck ER - TY - GEN A1 - Otto, Pascal A1 - Abendroth, Christian ED - Bockreis, Anke ED - Faulstich, Martin ED - Flamme, Sabine ED - Kranert, Martin ED - Mocker, Mario ED - Nelles, Michael ED - Quicker, Peter ED - Rettenberger, Gerhard ED - Rotter, Vera Susanne T1 - Untersuchung der mikrobiellen Profile von 70 verschiedenen Biogasanlagen und Identifizierung signifikanter technischer und chemischer Einflussgrößen auf das Mikrobiom T2 - 12. Wissenschaftskongress Abfall- und Ressourcenwirtschaft am 9. und 10. März 2023, Technischen Universität Hamburg, Tagungsband N2 - Das Mikrobiom umfasst die Gesamtheit aller Mikroorganismen, die ein Makroorganismus (Mensch, Tiere, Boden oder Biogasanlage) besiedelt. Aufgrund der Komplexität und Individualität der interagierenden Parameter ist das Zusammenwirken des Mikrobioms nicht ausreichend erforscht. Diese Studie fokussiert auf die Beeinflussung des Mikrobioms von Biogasanlagen durch chemische, technische und mikrobielle Faktoren. KW - Biogas KW - Mikrobiome Y1 - 2023 SN - 978-3-99106-095-6 U6 - https://doi.org/10.15203/99106-095-6 SP - 297 EP - 301 PB - Innsbruck university press CY - Innsbruck ER - TY - GEN A1 - Otto, Pascal A1 - Abendroth, Christian T1 - The European Biogas Landscape: One of the most comprehensive studies on the biogas sector N2 - At the BIOENERGY DOC2022 (5th doctoral colloquium bioenergy), results from the currently running EU project Micro4Biogas were presented (https://micro4biogas.eu/). The presented poster describes the sampling of more than 70 samples from a large number of biogas plants in Germany and the Netherlands. Samples were analysed chemically and taxonomically. A comprehensive dataset was developed for the technical description of the respective plants. In the next step, a holistic, multivariate analysis of the collected data sets is planned. KW - Anaerobic digestions KW - microbiomes Y1 - 2022 UR - https://www.dbfz.de/en/5th-doctoral-colloquium-bioenergy CY - Leipzig ER - TY - GEN A1 - Markowski, Jens A1 - Abendroth, Christian A1 - Lapushynska, Alina A1 - Lohse, Anja T1 - Experiences from the commissioning of a bioleaching plant for the recovery of gold from printed circuit boards T2 - Biomining´23 - 11th International Symposium on Biomining N2 - Production waste from the manufacture of PCB often contains gold-containing contact-strips, whereby the gold content is < 1 %. Recycling of these gold coatings with conventional melting processes is technically hardly, since the carrier materials often contain mechanical reinforcements and flame retardants in addition to thermosetting plastics. With mechanical recycling, gold losses of 50% are possible. Therefore, a bioleaching plant for the recovery of gold and copper as preliminary stage for the smelting process has been in operation on m&k´s site since May 2022. The bioleaching is realized with iron and sulfur oxidizing bacteria, e.g. Leptospirilum ferrooxidans. The apparatus consists of a 400 litres-leaching bioreactor and peripheral equipment (fermenter, cementation, filters). The plant can process up to 10 kg of gold-containing PCB waste per batch, while simultaneously regenerating a second batch of bioleaching fluid. The process can recover up to 450 mg goldtinsel and 25 g copperpowder per Kilogramm input. KW - Goldrecycling KW - Bioleaching KW - Biomining Y1 - 2023 UR - https://az659834.vo.msecnd.net/eventsairwesteuprod/production-mei-public/74ffa794ee6840e9879041ac3b34042f UR - https://mei.eventsair.com/biomining-23/programme PB - Mining Engineering CY - Falmouth (UK) ER -