College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China.
College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China.
Bioresour Technol. 2018 Feb;249:890-899. doi: 10.1016/j.biortech.2017.10.092. Epub 2017 Oct 31.
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 (NH-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 NH-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.
研究了盐度范围为 0 至 20g/L 时序批式反应器（SBR）中的去除性能、活性污泥特性和微生物群落。结果表明，盐度恶化了去除性能。氨氮（NH-N）、总磷（TP）和化学需氧量（COD）的去除率分别从 95.34%、93.58%和 94.88%（0g/L）逐渐降至 62.98%、55.64%和 55.78%（20g/L）。NH-N 和 TP 的去除主要在好氧阶段受到影响。此外，盐度增加了活性污泥的胞外聚合物（EPS）含量，降低了蛋白质（PN）和松散结合胞外聚合物（LB-EPS）的含量，从而使活性污泥具有更好的沉降性能。此外，盐度抑制了活性污泥的脱氢酶活性（DHA）。序列分析表明，Zoogloea 和 Thioclava 在 0 和 20g/L 盐度下分别占优势。高盐度下微生物群落的差异可能是由于丰富度的变化引起的。
