Microbial community redundancy in anaerobic digestion drives process recovery after salinity exposure.

摘要: Anaerobic digestion of high-salinity wastewaters often results in process inhibition due to the susceptibility methanogenic archaea. The ability microbial community deal with increased salinity levels is high importance ensure perseverance or recovery after failure. exact strategy endurance is, however, unknown. In this study, we investigated how able recover performance following a disturbance through application molasses wastewater. After stable start-up, methane production quickly decreased from 625 ± 17 232 ± 35 mL CH4 L−1 d−1 simultaneous accumulation volatile fatty acids up 20.5 ± 1.4 g COD L−1, indicating severe disturbance. A shift feedstock wastewater waste activated sludge resulted complete recovery. However, bacterial and archaeal communities did not return their original composition as before disturbance, despite similar conditions. Microbial diversity was recovered which indicates that metabolic potential maintained. mild increase ammonia concentration influence production, well-balanced community. Hence, given change it can be assumed redundancy major continuation without loss functionality flexibility.