双酚A废水处理系统中污泥的有机毒性特性研究  

Organic Toxicity in Activated Sludge in BPA Synthetic Wastewater Treatment System

作　　者：徐文璐[1] 杨娜[1] 胡园园[1] 陈秀荣[1] 艾奇峰[1] 王利鹏[1] 陈善佳[1] 黄华[1] 

机构地区：[1]华东理工大学资源与环境工程学院,上海200237

出　　处：《中国给水排水》2013年第3期57-60,65,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51008124);中央高校基本科研业务费专项资金资助项目

摘　　要：以处理双酚A(BPA)模拟废水的活性污泥系统为研究对象,经BPA初始浓度为2.5mg/L的模拟废水驯化后,考察在不同BPA初始浓度(5、7.5、20和40 mg/L)下出水COD浓度及水相与泥相不同分区中BPA含量及毒性的变化趋势。结果表明,在降解BPA的过程中,污泥外层EPS区域(占泥相的22.27%)无BPA及毒性的显著积累;在驯化与运行过程中,污泥内层EPS和胞内区域无BPA残留,但毒性不断积累,分析认为是在活性污泥降解BPA的过程中,毒性降解产物或BPA诱导微生物细胞分泌的毒性物质滞留在该区域所致。The activated sludge system treating bisphenol A （BPA） synthetic wastewater was cho- sen for study. The sludge was acclimated with synthetic wastewater containing 2.5 mg/L BPA. The efflu- ent COD, BPA content both in effluent and sludge, and sludge toxicity were investigated at BPA concen- trations of 5 mg/L, 7.5 mg/L, 20 mg/L and 40 mg/L. The results showed that no BPA and toxicity ac- cumulation were observed in loosely bound EPS （ accounting for 22.27% of sludge dry weight） during the degradation of BPA. Furthermore, no residual BPA was observed in tightly bound EPS and intracellu- lar space of sludge while the toxicity steadily climbed. In conclusion, the organic toxicity in tightly bound EPS and intracellular space of sludge was caused by the accumulation of degradation products and toxi- cants secreted by BPA-induced microbial cell during BPA degradation.

关 键 词：双酚A 序批式活性污泥法 污泥毒性 胞外多聚物 

分 类 号：X703[环境科学与工程—环境工程]