膜生物反应器对水源水中微量二氯酚的去除  

Removal of trace 2,4-dichlorophenol in drinking water source by membrane bioreactor

作　　者：张光辉[1] 郝爱玲[1] 陆彩霞[1] 顾平[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072

出　　处：《化工学报》2007年第2期471-475,共5页CIESC Journal

基　　金：教育部天南大合作项目"废水与微污染水处理创新技术研究"课题。~~

摘　　要：通过实验室小试，研究了一体式膜生物反应器（MBR）对微污染湖水中的微量2，4-二氯酚（2，4-DCP）的去除效果。64d的连续试验证实，当进水2，4-DCP浓度在2～200μg·L^-1时，MBR对2，4-DCP的平均去除率达93．6%。出水2，4-DCP浓度平均为4．28μg·L^-1，满足《城市供水水质标准》的要求。同时采用间歇试验对MBR去除2，4-DCP的机理进行了研究，证实生物作用在2，4-DCP的去除中起主要作用，MBR对2，4-DCP的去除符合零级动力学过程，降解速率常数为1．06μg·L^-1·min^-1此外，试验证实MBR对DCP的去除是基于二级基质原理，而向反应器内投加葡萄糖并不能促进MBR对2，4-DCP的去除。In this bench-scale test, a membrane bioreactor （MBR） was investigated for the removal of trace 2,4-dichlorophenol （2,4-DCP） from surface water with slight pollution. Sixty four days of continuous test proved that when the concentration of 2,4-DCP in the raw water fluctuated between 2-200 μg·L^-1 ,averaged removal efficiency reached 93.6%. And the averaged 2,4-DCP concentration in the treated water was 4.28 μg·L^-1, which could meet the Sanitary Standard for Drinking Water Quality issued by the Ministry of Health. At the same time, intermittent tests were carried out to study the 2,4-DCP removal mechanisms in MBR. It was concluded that biological degradation played a major role in 2,4-DCP removal by MBR. It was found that biodegradation of 2,4-DCP followed zero-order kinetics with a rate constant of 1.06 μg·L^-1· min^-1. Besides, it was confirmed that secondary substrate utilization was the mechanism that allowed effective biodegradation of 2,4-DCP by MBR, however dosing glucose into the raw water could not improve the biodegradation.

关 键 词：饮用水处理 微污染地表水 膜生物反应器 2 4-二氯酚 

分 类 号：TU991[建筑科学—市政工程]