TY - JOUR A1 - Holliger, Christof A1 - Astals, Sergi A1 - Laclos, Hélène Fruteau A1 - Hafner, Sasha D. A1 - Koch, Konrad A1 - Weinrich, Sören T1 - Towards a standardization of biomethane potential tests: A commentary JF - Water Science and Technology N2 - Inter-laboratory reproducibility of biomethane potential (BMP) is dismal, with differences in BMP values for the same sample exceeding a factor of two in some cases. A large group of BMP researchers directly addressed this problem during a workshop held in Leysin, Switzerland, in June 2015. The workshop resulted in a new set of guidelines for BMP tests published in 2016, which is the subject of the present commentary. The work has continued with two international inter-laboratory studies and one additional workshop held in Freising, Germany, in 2018. The dataset generated by the two inter-laboratory studies were used to refine the validation criteria for BMP tests. Based on these new results an update to the original guidelines is proposed here. Y1 - 2021 U6 - http://dx.doi.org/10.2166/wst.2020.569 SN - 0273-1223 VL - 83 IS - 1 SP - 247 EP - 250 ER - TY - JOUR A1 - Weinrich, Sören A1 - Nelles, Michael T1 - Systematic simplification of the Anaerobic Digestion Model No. 1 (ADM1): Model development and stoichiometric analysis JF - Bioresource Technology N2 - Rigorous process models provide a reliable basis for model-based monitoring and control of anaerobic digestion plants. Due to the complex model structure and non-linear system characteristics, the established Anaerobic Digestion Model No. 1 (ADM1) is rarely applied in industrial plant operation. The present investigation proposes a systematic procedure for successive model simplification and presents the description of five model variants of a mass-based ADM1. Individual model structures greatly differ in their number of implemented process phases, characteristic components and required parameters. Simplified model variants combine nutrient degradation and biogas formation based on first-order sum reactions, whereas complex model structures describe individual degradation pathways and intermediates during acido- and acetogenesis. Characteristic features of the derived model structures as well as the stoichiometric methane potentials and microbial biomass yields of the underlying degradation pathways of individual model variations are evaluated and discussed in detail. Y1 - 2021 U6 - http://dx.doi.org/10.1016/j.biortech.2021.125124 SN - 0960-8524 VL - 333 ER - TY - JOUR A1 - Weinrich, Sören A1 - Mauky, Eric A1 - Schmidt, Thomas A1 - Krebs, Christian A1 - Liebetrau, Jan A1 - Nelles, Michael T1 - Systematic simplification of the Anaerobic Digestion Model No. 1 (ADM1): Laboratory experiments and model application JF - Bioresource Technology N2 - Due to a limited number of available measurements on agricultural biogas plants, established process models, such as the Anaerobic Digestion Model No. 1 (ADM1), are rarely applied in practise. To provide a reliable basis for model-based monitoring and control, different model simplifications of the ADM1 were implemented for process simulation of semi-continuous anaerobic digestion experiments using agricultural substrates (maize silage, sugar beet silage, rye grain and cattle manure) and industrial residues (grain stillage). Individual model structures enable a close depiction of biogas production rates and characteristic intermediates (ammonium nitrogen, propionic and acetic acid) with equal accuracy as the original ADM1. The impact of different objective functions and standard parameter values on parameter estimates of first-order hydrolysis constants and microbial growth rates were evaluated. Due to the small number of required model parameters and suitable system characteristics, simplified model structures show clear advantages for practical application on agricultural biogas plants. Y1 - 2021 U6 - http://dx.doi.org/10.1016/j.biortech.2021.125104 SN - 0960-8524 VL - 333 ER - TY - GEN A1 - Weinrich, Sören T1 - Opportunities and challenges in anaerobic process modelling. 5th International conference on monitoring and process control of anaerobic digestion processes, Online, März 2021 Y1 - 2021 ER - TY - CHAP A1 - Weinrich, Sören T1 - Möglichkeiten und Herausforderungen der praxisnahen Prozesssimulation an Biogasanlagen T2 - Tagungsband Biogas in der Landwirtschaft - Stand und Perspektiven: FNR/KTBL-Kongress Y1 - 2021 SN - 978-3-945088-83-8 SP - 102 EP - 113 ER - TY - GEN A1 - Weinrich, Sören T1 - Möglichkeiten und Herausforderungen bei der Prozessmodellierung an Biogasanlagen. DECHEMA Virtual Talks - Trend zur Mess- und Regelungstechnik in der Biotechnologie, Online, Oktober 2021 Y1 - 2021 ER - TY - JOUR A1 - Cárdenas, Aura A1 - Ammon, Christian A1 - Schumacher, Britt A1 - Stinner, Walter A1 - Herrmann, Christiane A1 - Schneider, Marcel A1 - Weinrich, Sören A1 - Fischer, Peter A1 - Amon, Thomas A1 - Amon, Barbara T1 - Methane emissions from the storage of liquid dairy manure: Influences of reason, temperature and storage duration JF - Waste Management Y1 - 2021 U6 - http://dx.doi.org/10.1016/j.wasman.2020.12.026 SN - 0956-053X VL - 121 SP - 393 EP - 402 ER - TY - CHAP A1 - Winkler, Manuel A1 - Mauky, Eric A1 - Weinrich, Sören A1 - Rabe, Dirk A1 - Krebs, Christian A1 - Kretzschmar, Jörg T1 - Gazelle: Ganzheitliche Regelung von Biogasanlagen zur Flexibilisierung und energetischen Optimierung T2 - Tagungsband Biogas in der Landwirtschaft - Stand und Perspektiven: FNR/KTBL-Kongress Y1 - 2021 SN - 978-3-945088-83-8 SP - 171 EP - 172 CY - Darmstadt ER - TY - JOUR A1 - Mauky, Eric A1 - Winkler, Manuel A1 - Krebs, Christian A1 - Müller, Ulf A1 - Rabe, Dirk A1 - Weinrich, Sören A1 - Kretzschmar, Jörg T1 - Gazelle weist nach: Modellgestütztes Fütterungsmanagement ermöglicht flexible Prozessführung JF - Biogas Journal Y1 - 2021 SN - 1619-8913 VL - 24 SP - 114 EP - 119 ER - TY - BOOK A1 - Dandikas, Vasilis A1 - Herrmann, Christiane A1 - Hülsemann, Benedikt A1 - Jacobi, Hans-Fabian A1 - Krakat, Niclas A1 - Meißauer, Gabriele A1 - Merrettig-Bruns, Ute A1 - Oechsner, Hans A1 - Ohl, Susanne A1 - Paterson, Mark A1 - Reinhold, Gerd A1 - Roth, Ursula A1 - Weinrich, Sören T1 - Gasausbeute in landwirtschaftlichen Biogasanlagen: Potenziale, Erträge, Einflussfaktoren Y1 - 2021 SN - 978-3-945088-85-2 PB - KTBL ER -