文献类型：期刊文献

英文题名：The effect of quorum sensing on performance of salt-tolerance aerobic granular sludge: linking extracellular polymeric substances and microbial community

作者：Li, Cheng[1];Li, Wei[1,2,3,4];Li, Hui[5];Hou, Meng[1];Wu, Xiao[1];Zhuang, Jin-long[1];Liu, Yong-di[1,2,3,4]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Natl Engn Lab Ind Wastewater Treatment, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[5]Shanghai Univ, Sch Environm & Chem Engn, Inst Environm Pollut & Hlth, Shanghai 200444, Peoples R China

年份：2019

卷号：30

期号：5-6

起止页码：447

外文期刊名：BIODEGRADATION

收录：;EI(收录号：20193007241189);WOS:【SCI-EXPANDED(收录号:WOS:000501835700007)】；

基金：This work was financially supported by National Nature Science Foundation of China (51578240, 51808223), Fundamental Research Funds for the Central Universities (222201814053, 222201817009). We would like to thank James Shapleigh for reading an earlier version of the manuscript.

语种：英文

外文关键词：Salt-tolerance aerobic granular sludge; Quorum sensing; Organic pollutants removal; Extracellular polymeric substances; Microbial community

摘要：Aerobic granular sludge (AGS) technology is generally negatively affected by the salinity in high saline organic wastewater. The effect of salinity on organic pollutants removal of AGS was studied in three parallel sequencing batch reactors. The results indicated that the performance of reactors operating at relative low salinity (1%) remained stable. However, at medium salinity (2%) and higher salinity (4%) conditions, the organic pollutants removal efficiencies deteriorated from 93.7 +/- 3.0 to 71.6 +/- 6.8 and 53.6 +/- 5.4%, respectively. The addition of a mixture of acyl-homoserine lactone (AHL) mediated quorum sensing (QS) signaling molecules (0.1 mu mol/L of mixed C6-HSL, C8-HSL and 3OC8-HSL) only restored the performance of the 2% salinity reactor back to 86.3 +/- 6.2% due to the changing of hydrophobic extracellular polymeric substance ratio from 64 +/- 3 to 71 +/- 4%. Addition of the AHL had no effect on the pollution removal efficiency at the 4% salinity conditions. Microbial community analysis showed that Dyella (32.3%) species were the dominant member of the community and its occurrence was positively correlated with organic pollutants removal efficiency at relative high salinity (2% and 4%), while Mangrovibacter showed the opposite trend. Higher abundances of hdtS and acylase genes, the synthesis and degradation genes of AHL, were found after adding AHLs to reactors at 2% salinity, which indicated that AHL mediated QS was the primary QS system in salt-tolerant AGS.