影响一体式平板膜生物反应器临界通量的因素  

Factors affecting critical flux in submerged flat membrane bioreactor

作　　者：华娟[1] 吴志超[1] 刘江峰[1] 黄圣散[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《膜科学与技术》2007年第6期13-16,共4页Membrane Science and Technology

基　　金：上海市科委自然基金资助项目(052312046)

摘　　要：利用阶梯式通量递增法测定了一体式平板膜-生物反应器中的临界通量,对不同操作条件下测定值的差异进行了考察.通过正交试验设计,研究了曝气强度、污泥浓度(MLSS)和滤液COD(SCOD)三个因素分别在0.8,1.2,1.5 m3/h;10,20,30 g/L和50,100和150 mg/L水平下对临界通量测得值的影响.研究发现,污泥浓度和SCOD均对临界通量测得值呈负影响作用,而曝气强度则起正作用.随着污泥浓度和SCOD的增大,临界通量测得值是逐步减小的;而曝气强度的增大在一定程度上可以提高临界通量值.其中,临界通量测定值受SCOD的影响最大,MLSS次之,曝气强度最小.The critical flux of submerged flat membrane bioreactor was measured by using the flux stepwise method, and the differences of critical flux value were investigated by orthogonal design of different experimental conditions including aeration intensities of 0.8 m^3/h, 1.2 m^3/h, and 1.5 m^3/h; MLSS concentration of 10 g/L, 20 g/L, and 30 g/L; and soluble chemical oxygen demand （SCOD） of 50 mg/L, 100 mg/L, and 150 mg/L, respectively. It was found that the impacts of MLSS concentration and SCOD of the measured critical flux were negative, while the aeration intensity was positive. The critical fluxes decreased with the increases of both MLSS concentration and SCOD, while increased with the increasing of the aeration intensity. The order of the factors affecting the critical flux is： SCOD, MLSS concentration

关 键 词：膜生物反应器 平板膜 曝气量 污泥浓度 滤液COD 临界通量 

分 类 号：X703.3[环境科学与工程—环境工程]