一体式膜-生物反应器降低能耗的中试试验  

Pilot studies on reducing energy consumption of submerged membrane bioreactor.

作　　者：王孟杰[1] 魏春海[1] 黄霞[1] 文湘华[1] 张建新[2] 崔希龙[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]北京城市排水集团有限责任公司清河污水处理厂,北京100085

出　　处：《中国环境科学》2005年第3期297-301,共5页China Environmental Science

基　　金：国家"863"项目(2002AA601220)

摘　　要：基于气升式内循环反应器原理,对一体式膜-生物反应器结构进行了优化设计,构建了处理量为15.6m3/d的中试装置.通过水动力学特性的考察,得到中试装置的经济曝气强度为96m3/(m2·h);通过经济曝气强度条件下的临界通量试验,得到污泥浓度小于13g/L时的膜临界通量区域为30～35L/(m2·h).由此确定了中试装置连续运行的操作参数,实现了次临界通量[30L/(m2·h)]条件下处理城市污水的稳定运行.能耗分析显示,该中试反应器的气水比为21:1,有效单位产水能耗为0.42kW·h/m3.A pilot-scale submerged membrane bioreactor with treating capacity of 15.6 m3/d was developed on the basis of its structural optimization design according to the principle of air-lift internal-loop reactor. Economical aeration intensity of this installation was 96 m3/(m2·h) according to hydrodynamic investigation. Through critical flux test under the condition of economical aeration intensity, critical flux region of the membrane was 30-35 L/( m2·h) when the sludge concentration was less than 13 g/L. Therefore the operation parameters of continuous motion of the pilot installation was determined and under the condition of sub-critical flux of 30 L/( m2·h stable motion of sewage treatment was realized. Energy consumption analysis indicated that the air-to-water ratio of the pilot reactor was 21:1 and the effective unit energy consumption was 0.42 kW·h/m3.

关 键 词：一体式膜-生物反应器 气升式内循环反应器 经济曝气强度 次临界通量 能耗 

分 类 号：X703[环境科学与工程—环境工程]