Effect of different salinity adaptation on the performance and microbial community in a sequencing batch reactor.
The performance and microbial community profiles in a sequencing batch reactor (SBR) treating saline wastewater were studied over 300days from 0wt% to 3.0wt% salinity. The experimental results indicated that the activated sludge had high sensitivity to salinity variations in terms of pollutants removal and sedimentation. At 2.0wt% salinity, the system retained a good performance, and 95% removal rate of chemical oxygen demand (COD), biochemical oxygen demand (BOD), NH4(+)-N and total phosphorus (TP) could be achieved. Operation before addition salinity revealed the optimal performance and the most microbial diversity indicated by 16S rRNA gene clone library. Sequence analyses illustrated that Candidate_division_TM7 (TM7) was predominant at 2.0 wt% salinity; however, Actinobacteria was more abundant at 3.0wt% salinity.
School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Yuanyuan
Y
Zhao
School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, South Korea.
Hee-Deung
HD
Park
School of Civil, Environmental and Architectural Engineering, Korea University, Seoul, South Korea.
Jeong-Hoon
JH
Park
School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Fushuang
F
Zhang
School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
Chen
C
Chen
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Xiangkun
X
Li
School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Dan
D
Zhao
School of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: zfbhit@163.com.
Fangbo
F
Zhao
D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D054712:Salinity; D012722:Sewage / Q000382:microbiology*; D018508:Water Purification / Q000379:methods*
D012722:Sewage
Activated sludge; High-throughput amplicon sequencing; Microbial community; Phylogenetic analysis; Salinity influence