| Literature DB >> 29145115 |
Yujuan Chen1, Huijun He1, Hongyu Liu1, Huiru Li1, Guangming Zeng1, Xing Xia1, Chunping Yang2.
Abstract
The removal performance, activated sludge characteristics and microbial community in sequencing batch reactors (SBRs) were studied at salinity ranging from 0 to 20 g/L. Results showed that salinity deteriorated the removal performance. Removal rate of ammonium (NH4+-N), total phosphorus (TP) and chemical oxygen demand (COD) were gradually dropped from 95.34%, 93.58% and 94.88% (0 g/L) to 62.98%, 55.64% and 55.78% (20 g/L), respectively. The removals of NH4+-N and TP were mainly influenced during aerobic phase. Besides, salinity increased the extracellular polymeric substances (EPS) content of activated sludge, decreased the content of protein (PN) and loosely bound extracellular polymeric substances (LB-EPS) which led to better settleability of activated sludge. Moreover, salinity inhibited the dehydrogenase activity (DHA) of activated sludge. Sequence analysis illustrated Zoogloea and Thioclava were predominant at 0 and 20 g/L salinity, respectively. The difference of microbial community under high salinity was likely caused by the variation of richness.Entities:
Keywords: Extracellular polymeric substances; Microbial community; Salinity; Sequencing batch reactor; Wastewater
Mesh：
Substances：
Year: 2017 PMID： 29145115 DOI： 10.1016/j.biortech.2017.10.092
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642