壬基酚聚氧乙烯醚在MBR与CASR中的行为  

The behavior of nonylphenol ethoxylate in MBR and CASR

作　　者：陈健华[1] 周颖君[1] 黄霞[1] 津野洋[2] 

机构地区：[1]清华大学环境科学与工程系,环境模拟与污染控制国家重点联合实验室,北京100084 [2]京都大学,日本京都

出　　处：《中国环境科学》2008年第6期501-506,共6页China Environmental Science

基　　金：国家自然科学基金重大国际合作项目(20721140019)

摘　　要：对比研究了壬基酚聚氧乙烯醚（NPnEO,n为1-4）在膜-生物反应器（MBR）和传统活性污泥反应器（CASR）中的去除效果和迁移行为.结果表明,在相同NPnEO污泥负荷的条件下,采用不主动排泥的运行模式,2种反应器均能有效去除NPnEO,去除率分别为99.2%和97.1%,MBR的去除效果更稳定.前21d中,2种反应器中混合液NPnEO浓度均呈现先增大后减小的趋势,但MBR出水NPnEO浓度小于其混合液浓度,而CASR出水浓度则高于其混合液浓度;21d后,2种反应器混合液与出水浓度均趋于一致.活性污泥对NPnEO具有吸附作用,但对去除NPnEO的贡献很小;推测生物降解是去除NPnEO的主导作用.The removal rate and transference behavior of nonylphenol ethoxylates （NPnEO, n=1-4） in a membrane bioreactor （MBR） and a conventional activated sludge reactor （CASR） were contrast studied. Under the condition of the same NPnEO-sludge loading, adopting the operation type of not initiative sludge discharge, two kinds of reactors could both remove NPnEO effectively, removal rates were 99.2% and 97.1% respectively, but the removal rate of MBR was more steady. Before 21d, in two kind of reactors, the concentrations of NPnEO in mixed liquor appeared the tendency of first increase and decrease subsequently, but the effluent concentration of MBR was smaller than its mixed liquor, and the effluent concentration of CASR was higher than its mixed liquor; after 21d, the mixed liquor and effluent concentrations in both reactors all tended to be the same. Activated sludge possessed adsorption action on NPnEO, but very small on removing contribution; inferring that biodegradation was the dominating mechanism on NPnEO removal.

关 键 词：壬基酚聚氧乙烯醚 膜-生物反应器 传统活性污泥反应器 压力溶剂萃取 表观分配系数 污泥吸附 

分 类 号：X703[环境科学与工程—环境工程]