复合膜生物反应器的除污性能研究

Study on Contaminant Removal Performance in Hybrid Submerged Membrane Bioreactor

采用自行设计研制的复合膜生物反应器处理模拟生活污水，考察了系统的除污性能。结果表明，在HRT为9h、SRT为30d、DO为2～3．5mg／L的条件下，系统对COD、NH3-N和浊度具有较好的去除效果，平均去除率分别为90％、89％和90％。生物降解主要承担了对COD和NH3-N的去除作用，膜截留起到了稳定出水水质及去除浊度物质的作用。

A newly designed hybrid submerged membrane bioreactor was used to treat simulated domestic wastewater, and the contaminant removal performance of the reactor was investigated. The results show that when the HRT is 9 h, SRT is 30 d and DO is 2 to 3.5 mg/L, the reactor can effectively remove COD, NH3 - N and turbidity with average rates of 90%, 89% and 90% respectively. Biodegradation has a main effect on COD and NH3 -N removal. Furthermore, membrane rejection is responsible for the stable effluent quality and turbidity removal.