环境工程学报2017，Vol.11Issue(11)：5836-5842,7.DOI:10.12030/j.cjee.201608073
不同泥龄对活性污泥絮凝特性的影响
Effects of SRT on activated sludge bioflocculation
摘要
Abstract
This study investigated the bioflocculation characteristics and the mechanism of active sludge at different solid retention times (SRT).Sequencing batch reactors with different solid retention times were employed to examine the influence of the bioflocculation characteristics and active sludge mechanism on the two components of EPS which contained flocs EPS (extra-microcolony polymeric substances,EMPS) and microcolony EPS (extracellular polymeric substances,ECPS).By testing the extended DLVO theory and the EPS components,we analyzed the bioflocculation characteristics and active sludge mechanisms at different SRT.The results showed that with the increase of SRT,bioflocculation characteristics of the active sludge improved.During this process,the interaction energy curve of the sludge had an obvious barrier that became lower in time.Meanwhile,the levels of EMPS and ECPS gradually decreased,showing that the changes in the EMPS content were more obvious than the changes in the ECPS content.The protein and humic substance content of EMPS gradually decreased as well,indicating that higher sludge interaction energy barrier and the EMPS content were the internal mechanisms of lower sludge flocculation.The change in the EMPS components,especially in protein and humic substance content of EMPS,was the main reason of diverse sludge bioflocculation at different SRT.关键词
污泥龄/胞外聚合物/相互作用能/絮凝性能Key words
solid retention time/extracellular polymeric substances/interaction energy/flocculation ability分类
资源环境引用本文复制引用
詹咏,张焕焕,冯青青,刘明昊,董滨,何群彪..不同泥龄对活性污泥絮凝特性的影响[J].环境工程学报,2017,11(11):5836-5842,7.基金项目
国家水体污染控制与治理科技重大专项(2012ZX07313-001,2013ZX07314-003) （2012ZX07313-001,2013ZX07314-003）
国家高技术研究发展计划(863)项目(2012AA063303) （863）
“十二五”国家科技支撑计划项目(2014BAC29B01) （2014BAC29B01）
国家自然科学基金资助项目(51578397,51279108) （51578397,51279108）
上海大学生创新创业训练计划项目(SH2017127) （SH2017127）
上海市科委基础研究重大项目(13DJ1400105) （13DJ1400105）
国家重点研发计划项目(2016YFC0402504) （2016YFC0402504）
