Characterization of microbial communities in anaerobic acidification reactors fed with casein and/or lactose

Applied Microbiology and Biotechnology, Год журнала: 2022, Номер 106(18), С. 6301 - 6316

Опубликована: Авг. 26, 2022

Protein-rich agro-industrial waste streams are high in organic load and represent a major environmental problem. Anaerobic digestion is an established technology to treat these streams; however, retardation of protein degradation frequently observed when carbohydrates present. This study investigated the mechanism by manipulating carbon source fed complex anaerobic microbiota linking reactor performance variation microbial community. Two acidification reactors were first acclimated either casein (CAS reactor) or lactose (LAC reactor), then with mixtures lactose. Results showed that was present, community shifted from mainly Chloroflexi Proteobacteria Firmicutes, degree deamination CAS decreased 77 15%, VFA production 75 34% effluent COD. A decrease 75% protease activity 90% also observed. The microorganisms can ferment both proteins predominant community, thermodynamical point view, they consumed prior proteins. negative effect on be attributed substrate preference populations. KEYPOINTS: • presence retarded degradation. Facultative genera dominant absence Substrate-preference caused

Язык: Английский

Anaerobic Degradation of Excess Protein-Rich Fish Feed Drives Ch4 Ebullition in a Freshwater Aquaculture Pond

Опубликована: Янв. 1, 2024

Язык: Английский