中文摘要：

以实际平板膜生物反应器为研究对象,以自由曝气为对照,考察了在不同曝气强度（0.625,1.25,2.5,5L/min）和不同曝气频率（0.17,0.33,0.42,0.56,0.83Hz）下,活塞流曝气对膜表面压力及其变化系数的影响.结果表明,在试验所设范围内,当曝气频率一定时,活塞流曝气引起的平板膜表面压力变化与强度有关;在相同曝气强度下,存在一个最佳的曝气频率范围,使活塞流曝气引起的膜表面压力最大.在相同曝气强度下,可控制的活塞流曝气可以获得比自由曝气更佳的压力变化效果.当曝气量为2.5L/min时,曝气频率0.33Hz的活塞流曝气所带来的压力系数变化高于曝气量为5.0L/min的自由曝气.

英文摘要：

The concept of gas bubbling to enhance hydrodynamic characteristics can be very effectively applied to different membrane processes,including submerged flat sheet membrane.The major current application of bubbling in membrane process is in the membrane bioreactors（MBR） using submerged membrane.However,limited data of a fundamental nature have been published for bubble interactions with submerged flat sheet membrane.In this paper,the pressure and pressure change were measured and analyzed in flat sheet MBR with free bubbling and slug bubbling respectively.The relationship between hydrodynamic characteristics and bubble properties was revealed.In particular,air flow rates（0.625,1.25,2.5,5L/min） and bubble frequencies（0.17,0.33,0.42,0.56,0.83Hz） with slug bubbling could be achieved to enhance turbulence so as to control membrane fouling.The pressure fluctuation range of membrane induced by slug bubbling with frequency and areation density of 0.33Hz and 2.5L/min was twice than free bubbling of 5.0L/min.It is possible to decrease energy consumption by inducing slug bubbling in industrial MBR.