Effects of salinity on the simultaneous anammox and denitrification process: performance, sludge morphology and shifts in microbial communities.

ABSTRACT: In this study, the long-term effects of different salinities on the performance, sludge morphology and shifts in microbial communities were studied in a simultaneous anammox and denitrification (SAD) process at a C/N ratio of 0.5. Stable nitrogen removal efficiencies of 86.96 and 84.58% and nitrogen removal rates of 0.95 and 0.93 kg (m³ d)^-1 could be achieved under low (25 mmol l^-1) and moderate (50 mmol l^-1) salinity, respectively. However, the performance collapsed when the system was exposed to high salinity (100 mmol l^-1). The content of extracellular polymeric substances increased as salinity increased, which resulted in larger sizes of granular sludge under low and moderate salinities. Nevertheless, high salinity shock disintegra

SUBMITTER: Wang Z 

PROVIDER: S-EPMC8113906 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature