摘要
采用复合式膜生物反应器处理生活污水,基于胞外聚合物(EPS)的分析,研究不同污泥(SRT)对膜污染的影响与作用机理。结果表明:溶解性EPS(S-EPS)和松散附着性EPS(LB-EPS)均随SRT的延长逐渐减少,并在SRT为30 d时到达最低点;继续延长SRT,S-EPS保持稳定而LB-EPS则迅速增高。S-EPS的减少能够降低膜孔阻力(R_p)和滤饼层阻力(R_c);LB-EPS的减少能够改善污泥的絮凝与沉淀性能,进而降低R_c。当SRT由10 d延长到30 d时,R_c和R_p分别降低了19.7%和8.5%,膜组件运行周期延长了23.2%。
A pilot scale experiment was conducted using five hybrid membrane bioreactor to treat with domestic wastewater at different sludge retention time（SRT） at the same time,on the basis of extracellular polymeric substances（EPS） analysis,the effect and mechanism of SRT on membrane fouling was studied.Results showed that soluble EPS（S-EPS） and loosely bond EPS（LB-EPS） decreased with the increasing of SRT,and the minimum values of them were both obtained when SRT reached to 30 d.After that,S-EPS remained stable and LB-EPS increased rapidly with the SRT increasing.The reduce of S-EPS could result in the decrease of membrane pore resistance（R_p） and cake layer resistance（R_c）.The reduce of LB-EPS could cause the improvement of sludge flocculation and sedimentation,resulting in the decrease of R_c.Consequently,when the SRT was prolonged from 10 d to 30 d,R_c and R_p were reduced by 19.7% and 8.5%,respectively,and the operational period of membrane module was prolonged by 23.2%.
出处
《环境工程》
CAS
CSCD
北大核心
2018年第1期32-36,共5页
Environmental Engineering
基金
江苏省自然科学基金项目"基于胞外聚合物特性分析的污泥龄对复合式膜生物反应器中膜污染的影响与作用机理"(BK20151161)
江苏省高等学校自然科学研究重大项目"复合式膜生物反应器的微生物分布特性与膜污染控制原理"(17KJA610004)
徐州市科技项目"污泥龄对复合式膜生物反应器运行效能的影响与优化技术研究"(KC16SQ192)
徐州工程学院科研项目"生态式膜生物反应器的开发及应用"(XKY2013106)
江苏高校"青蓝工程"资助
关键词
复合式膜生物反应器
生物膜
膜污染
胞外聚合物
膜阻力
hybrid membrane bioreactor
biofilm
membrane fouling
extracellular polymeric substances
membraneresistance
