@article{WeinrichMaukySchmidtetal.2021, author = {Weinrich, S{\"o}ren and Mauky, Eric and Schmidt, Thomas and Krebs, Christian and Liebetrau, Jan and Nelles, Michael}, title = {Systematic simplification of the Anaerobic Digestion Model No. 1 (ADM1): Laboratory experiments and model application}, series = {Bioresource Technology}, volume = {333}, journal = {Bioresource Technology}, issn = {0960-8524}, doi = {10.1016/j.biortech.2021.125104}, year = {2021}, abstract = {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.}, language = {en} } @article{WeinrichNelles2021, author = {Weinrich, S{\"o}ren and Nelles, Michael}, title = {Systematic simplification of the Anaerobic Digestion Model No. 1 (ADM1): Model development and stoichiometric analysis}, series = {Bioresource Technology}, volume = {333}, journal = {Bioresource Technology}, issn = {0960-8524}, doi = {10.1016/j.biortech.2021.125124}, year = {2021}, abstract = {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.}, language = {en} } @article{HolligerAstalsLaclosetal.2021, author = {Holliger, Christof and Astals, Sergi and Laclos, H{\´e}l{\`e}ne Fruteau and Hafner, Sasha D. and Koch, Konrad and Weinrich, S{\"o}ren}, title = {Towards a standardization of biomethane potential tests: A commentary}, series = {Water Science and Technology}, volume = {83}, journal = {Water Science and Technology}, number = {1}, issn = {0273-1223}, doi = {10.2166/wst.2020.569}, pages = {247 -- 250}, year = {2021}, abstract = {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.}, language = {en} } @article{GoekgoezWinklerBarchmannetal.2021, author = {G{\"o}kg{\"o}z, Fatih and Winkler, Manuel and Barchmann, Tino and Weinrich, S{\"o}ren and Liebetrau, Jan and Nelles, Michael}, title = {Combining Electricity and Fuel Supply: Operational Strategies for Biogas Plants}, series = {Chemical Engineering \& Technology}, volume = {44}, journal = {Chemical Engineering \& Technology}, number = {1}, issn = {0930-7516}, doi = {10.1002/ceat.202000268}, pages = {183 -- 193}, year = {2021}, language = {en} } @article{CardenasAmmonSchumacheretal.2021, author = {C{\´a}rdenas, Aura and Ammon, Christian and Schumacher, Britt and Stinner, Walter and Herrmann, Christiane and Schneider, Marcel and Weinrich, S{\"o}ren and Fischer, Peter and Amon, Thomas and Amon, Barbara}, title = {Methane emissions from the storage of liquid dairy manure: Influences of reason, temperature and storage duration}, series = {Waste Management}, volume = {121}, journal = {Waste Management}, issn = {0956-053X}, doi = {10.1016/j.wasman.2020.12.026}, pages = {393 -- 402}, year = {2021}, language = {en} } @misc{GrueningSchmitzHoppeetal.2021, author = {Gr{\"u}ning, Helmut and Schmitz, Thorsten and Hoppe, Holger and B{\"o}ckmann, Daniela}, title = {Leitfaden zur Beseitigung und Vermeidung von Fehleinleitungen in die Regenwas-serkanalisation f{\"u}r Kanalnetzbetreiber in NRW. Landesamt f{\"u}r Natur, Umwelt und Verbraucherschutz des Landes Nordrhein-Westfalen.}, publisher = {LANUV}, address = {D{\"u}sseldorf}, year = {2021}, abstract = {Der Leitfaden enth{\"a}lt einen {\"U}berblick {\"u}ber unterschiedliche Detektionsme-thoden. Die bisher in den meisten F{\"a}llen durchgef{\"u}hrte Benebelung eignet sich zwar f{\"u}r die Detektion von Regenwasserleitungen an die Schmutzwasserkanalisation, f{\"u}r die sichere Detektion von Schmutzwasserleitungen an die Regenwasserkanalisation eignet sich dieses Verfahren nur eingeschr{\"a}nkt. Ursache daf{\"u}r sind beispielsweise unterschiedliche Arten der Entl{\"u}ftung der Hausinstallation oder die Verwendung einer Abwasserhe-beanlage. DTS-Messungen stellen neben etablierten Methoden ein genaues Verfahren zur exakten Detektion von Temperaturauff{\"a}lligkeiten dar, die ein sicheres Indiz f{\"u}r Fehleinleitungen sind. Je nach Randbedingungen kann eine Kombination mit weiteren Detektionsmethoden er-forderlich sein, um Untersuchungsgebiete einzugrenzen oder eine eindeutige Zuordnung eines Fehlanschlusses zu gew{\"a}hrleisten.}, language = {de} } @article{WetterBruegging2021, author = {Wetter, Christof and Br{\"u}gging, Elmar}, title = {G{\"a}rprodukte entsticken mit Kalk}, series = {Umwelt Magazin}, volume = {2021}, journal = {Umwelt Magazin}, number = {Ausgabe 19-10/2021}, issn = {0173-363X}, pages = {53 -- 55}, year = {2021}, language = {de} } @article{WetterBruegging2021, author = {Wetter, Christof and Br{\"u}gging, Elmar}, title = {Erneuerbare Energie speichern - CO2 einsparen}, series = {Wirtschaft M{\"u}nsterland}, volume = {2021}, journal = {Wirtschaft M{\"u}nsterland}, number = {Ausgabe 1}, pages = {61}, year = {2021}, language = {de} } @article{WetterBruegging2021, author = {Wetter, Christof and Br{\"u}gging, Elmar}, title = {Wasserstoff Zukunftstechnologie oder nur ein "Hype"}, series = {Wirtschaft M{\"u}nsterland}, volume = {2021}, journal = {Wirtschaft M{\"u}nsterland}, number = {Ausgabe 1}, pages = {14}, year = {2021}, language = {de} } @article{WetterBruegging2021, author = {Wetter, Christof and Br{\"u}gging, Elmar}, title = {Kompetenznetzwerk "HYMAT-Energie"}, series = {Wirtschaft M{\"u}nsterland}, volume = {2021}, journal = {Wirtschaft M{\"u}nsterland}, number = {Ausgabe 1}, pages = {16}, year = {2021}, language = {de} }