摘要
膜污染是影响膜生物反应器技术推广应用的关键.采用一体式膜生物反应器,控制不同污泥浓度条件,对不同曝气强度下膜污染发展速率及其形成机理进行了试验研究.试验结果表明:不同污泥浓度下均存在一个经济曝气强度,当污泥浓度分别为:3,6,8和10g/L时,其对应经济曝气强度分别为:36,72,84和120m3/(m2.h),且经济曝气强度的大小随污泥浓度升高呈线性增加.同时从理论上推导出一个临界污泥浓度,其大小为5.15g/L.膜生物反应器在经济曝气强度和临界污泥浓度下运行膜污染发展缓慢.
The key factor of affecting the application of membrane bioreactors` (MBR) on a large scale is the membrane fouling. The membrane fouling developing rate and mechanism in the submerged membrane bioreactor were investigated by different sludge concentration under different aeration intensity in this paper. The experimental results indicate that economical aeration intensity of MBR at sludge concentrations of 3,6,8 and 10 g/L is 36,72,84 and 120 m^3/(m^2·h),respectively. The economical aeration intensity is proportional to the increased sludge concentration. A critical sludge concentration (5.15 g/L) is theoretically proved. Membrane fouling of MBR develops slowly under the condition of economical aeration intensity and critical sludge concentration.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2004年第4期476-479,共4页
Journal of China University of Mining & Technology
基金
清华大学"985"重点科研项目(082100200)
关键词
膜生物反应器
膜污染
临界污泥浓度
动态膜
粒径分布
membrane bioreactor(MBR)
critical sludge concentration
membrane fouling
dynamic membrane
particle size distribution
