摘要
膜面污泥沉积是膜污染的主要构成部分 .膜间液体上升流速 (曝气量 )、膜通量和污泥浓度等运行条件是影响一体式膜 生物反应器膜面污泥沉积速率的重要因素 .本研究通过均匀设计法安排了 1 0次试验 ,实测了各试验点下的膜间液体上升流速 ,得到了适用于活性污泥混合液条件下的膜间液体上升流速计算模型 .并实测了膜过滤阻力的上升速率 ,建立了膜间液体上升流速 (uLr)、污泥浓度 (X)和膜通量 (J)对污泥沉积速率 (K)的影响模型 :K=(8 93 3× 1 0 7)·X0 53 2 ·J0 3 76 ·uLr- 3 0 4 7.通过该模型 ,可以讨论临界曝气强度和临界膜通量 ,也可以对不同操作条件下的膜污染发展情况进行预测 .
Aeration intensity, membrane flux and sludge concentration are three important parameters for long-term stable operation of a submerged membrane bioreactor because of their great impact on membrane fouling. Ten runs under different conditions according to uniform design were carried out in a wide range. Cross-flow velocities ( u Sr) were measured under various aeration intensities ( G ) and sludge concentrations( X ). Their relationship was generalized as u Sr=1.311· u 1.226 Lr·e -0.0105 ...
出处
《环境科学》
EI
CAS
CSCD
北大核心
2002年第S1期26-30,共5页
Environmental Science
基金
国家"九五"科技攻关项目
关键词
膜污染
污泥沉积速率
曝气强度
膜通量
污泥浓度
膜间液体上升流速
membrane fouling
aeration intensity
membrane flux
sludge concentration
cross-flow velocity
the increasing rate of the filtration resistance
