Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4997560 | Bioresource Technology | 2017 | 29 Pages |
Abstract
The evolution and population dynamics of complex anaerobic microbial communities in anaerobic digesters were investigated during stable operation and recovery after prolonged starvation. Three thermophilic reactor systems fed with cattle manure were operated continuously in parallel for 167Â days. Significant changes in the microbial communities were observed for both the bacterial and archaeal populations as the reactor systems were subjected to changing feeding regimes. The ecosystems developed from being relatively similar in structure to more specialised communities, with large population shifts within the acetogenic and methanogenic communities, which appeared to shift towards the hydrogenotrophic methanogenesis pathway. All reactor systems showed signs of adaptation to a harsher environment under high VFA, H2S and ammonia concentrations, but remained at a lower degree of stability after 45Â days of recovery compared to stable period of operation before starvation.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Nadieh de Jonge, Veronica Moset, Henrik Bjarne Møller, Jeppe Lund Nielsen,