一体式MBR控制膜污染的最佳曝气强度及影响因素  

OPTIMUM AERATION STRENGTH AND ITS INFLUENCING FACTORS FOR MEMBRANE FOULING CONTROL IN AN INTEGRATED MEMBRANE BIOREACTOR

作　　者：杨小丽[1] 王世和[1] 卢宁[1] 

机构地区：[1]东南大学市政工程系,江苏南京210096

出　　处：《水处理技术》2006年第5期17-19,共3页Technology of Water Treatment

基　　金：江苏省建设厅资助项目(JS200308)

摘　　要：强化曝气可有效控制膜污染,但会导致系统能耗增加,且曝气强度过大还会对膜污染控制产生负面影响;系统存在一个经济曝气强度-可在保证处理效果、控制膜污染的同时最大限度地降低能耗。反应器结构、膜组件型式、曝气方式、污泥浓度、抽停时间、操作压力等运行条件都会影响经济曝气强度。本试验条件下,最佳组合操作条件为:经济曝气强度500～550L/m·2h、污泥浓度6g/L、抽吸时间12min、停抽时间3min、操作压力40kPa。Membrane fouling is one of the main factors restricting the development and application of integrated membrane bioreactor. Strengthening aeration is an effective way to control membrane fouling while the operation cost ascending. Too high aeration intensity would do negative effect on controlling membrane fouling. There was an optimum aeration intensity, which could achieve high removal efficiency, controlling pollution and decreasing cost simultaneously. Reactor construction, module design, aeration style, mixed liquid suspended sludge （MLSS）, suction/suspended time and operation pressure were all the important affecting factors for determining the optimum aeration intensity. In this study, the optimum operation parameters were economic aeration intensity of 500～550L/m^2. h, MLSS of 6g/L, 12 min of suction time, 3 min of suction suspended time and operation pressure of 40kPa.

关 键 词：膜污染 曝气强度 污泥浓度 抽停时间 操作压力 

分 类 号：TQ028.8[化学工程] X703.3[环境科学与工程—环境工程]