摘要
通过浸没式膜-生物反应器(SMBR)处理上海市城市内河水的试验,研究了反应器混合液中和2种疏水性不同的膜上污泥胞外聚合物(EPS)的量、组成、污泥特性及对膜过滤性能的影响.结果表明,混合液污泥中的溶解性EPS和固着性EPS比膜上污泥多,不同污泥的固着性EPS组分中蛋白质(EPSP)/多糖(EPSC)的大小顺序依次为混合液污泥<亲水膜污泥<疏水膜污泥.疏水膜污泥中溶解性EPS比亲水膜多,溶解性EPS和固着性EPS量及组分均有很大差异.混合液污泥的EPS流动性大,疏水性膜上污泥EPS的流动性较大.溶解性EPS对污泥特性及膜过滤性能影响较大.SMBR中亲、疏水性膜片上黏附的污泥的相对疏水性分别为53%、59%.比较2种膜片通量的变化发现,疏水性膜污染严重.
This paper investigated the amount and composition of extracellular polymeric substances （EPS） in activated sludge from mixed liquor as well as those in sludges from a hydrophilic and a hydrophobic membrane, respectively, in a Submerged membrane bioreactor （SMBR） treating river water in Shanghai, and analyzed the characteristics of these sludges. The effect of EPS and sludge hydrophabicity on filtration of membrane was studied. The experiment results showed that total amount of EPS in sludge from mixed liquor was more than those from membrane surface, and the ratio of EPSp/EPSc ranked mixed liquor 〈 hydrophilic membrane 〈 hydrophohic membrane. The quantity and components of Soluble EPS and Bound EPS were different among three kinds of sludges. The quantity of Soluble EPS from hydrophohic membrane was more than that from hydrophilic membrane. EPS in sludge from mixed liquor was looser than those from the membrane surfaces. EPS in sludge from hydrophilic and hydrophobic membrane surface was tightly adhered to cell surfaces. Soluble EPS greatly affected membrane filtration. Relative hydrophobicity of sludge from hydrophilic and hydrophobic membrane surface was 53 % and 59% respectively. Comparison of flux revealed that hydrophohic membrane fouling was more serious than hydrophilic one, and the ability of anti-fouling of the latter was higher than that of the former.
出处
《环境科学学报》
CAS
CSCD
北大核心
2005年第12期1602-1607,共6页
Acta Scientiae Circumstantiae
基金
国家自然科学基金资助项目(No.20377010)~~
关键词
浸没式膜-生物反应器
胞外聚合物
膜污染
亲水性膜
疏水性膜
submerged membrane bioreactor（SMBR）
extracellular polymeric substances（EPS）
membrane fouling
hydrophilic membrane
hydrophobic membrane
作者简介
王雪梅（1979-）,女,硕士研究生,E-mail：xuemi0826@163.com,Tel：021-55664403;
刘燕（1963-）,女,四川成都人,博士,教授.主要从事环境化学、环境微生物学、环境工程、给水排水工程的教学、科研和设计.共完成包括国家自然科学基金在内的10项省部级以上纵向基金项目（其中4项为第一负责人）,16项横向科研项目（其中9项为第一负责人）,11项设计项目（其中9项为第一负责人）,现主持一项国家自然科学基金项目、一项＂863＂子项目和两项横向科研课题.申请国家专利6项,5项为第一发明人,获两项获国家发明专利.共发表学术论文51篇,其中：SCI收录14篇;EI收录8篇.分别在美国、法国、澳大利亚的国际水质协会、环境工程协会年会上作专题学术报告.电话：021-55664403（O）,E-mail：liuyan@fudan.edu.cn通讯作者（责任作者）
