文献类型：期刊文献

英文题名：Correlation between the uncoupling metabolism induced by 2,4,6-trichlorophenol and sludge toxicity in sequence batch reactors

作者：Chen, Xiurong[1,2];Lu, Quanling[1,2];Wang, Shanshan[1,2];Sun, Xiaoli[1,2];Li, Qiuyue[1,2];Wei, Xiao[1,2];Yang, Yingying[1,2];Wang, Yuan[1,2]

机构：[1]East China Univ Sci & Technol, Protect Key Lab Environm Risk Assessment & Contro, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Natl Engn Lab High Concentrat Refractory Organ Wa, Shanghai 200237, Peoples R China

年份：2020

卷号：82

期号：10

起止页码：1971

外文期刊名：WATER SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20205109662916);WOS:【SCI-EXPANDED(收录号:WOS:000596173700001)】；

基金：This research was supported by the National Key Research and Development Program of China (2017YFB0602804), National Natural Science Foundation (No. 51378207), the special S&T project on treatment and control of water pollution (2014ZX07202-011).

语种：英文

外文关键词：2; 4; 6-TCP; SBR; sludge reduction; sludge toxicity; uncoupling metabolism

摘要：The correlation between sludge reduction induced by 2,4,6-trichlorophenol (2,4,6-TCP) as an uncoupler and sludge toxicity was investigated in sequence batch reactors over a 100-d operation period. The influent concentrations of 2,4,6-TCP tested were 10 mg/L, 30 mg/L, and 50 mg/L. Sludge reduction, chemical oxygen demand (COD) removal rate, and sludge toxicity were measured. The results showed that from 30 to 80 d, when the COD removal rate was at an acceptable level, the sludge reduction levels for the 10 mg/L, 30 mg/L, and 50 mg/L groups were 9.7%, 31.6%, and 41.5%, respectively, and the average sludge toxicity values were 24.2%, 38.0%, and 53.0%, respectively. Sludge reduction was positively correlated with sludge toxicity. The two-dimensional polyacrylamide gel electrophoresis/results showed that extracellular and intracellular proteins secreted by the activated sludge during uncoupling metabolism were positively correlated with sludge toxicity. Taking the COD removal rate, sludge reduction, and sludge toxicity into consideration, the optimal influent concentration of the uncoupler 2,4,6-TCP was 30 mg/L when the initial mixed liquid suspended solids of sludge was 2,500 mg/L.