外置式动态膜生物反应器处理生活污水  

Treatment of domestic wastewater by recirculated dynamic membrane bio-reactor

作　　者：李小利[1,2] 张玉洁[1] 赵继红[1] 

机构地区：[1]河南工业大学化学化工学院,郑州450001 [2]黄土高原土壤侵蚀与旱地农业国家重点实验室,中国科学院水利部水土保持研究所,陕西杨陵712100

出　　处：《膜科学与技术》2012年第4期107-111,共5页Membrane Science and Technology

基　　金：河南工业大学高层次人才基金(150329);黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金(10501-275)

摘　　要：采用孔径为30μm的工业滤布、硬质PVC管支撑体、不锈钢管套构造外置式膜生物反应器,观察不同过滤压差对动态膜形成及出水通量和浊度的影响,并研究其对生活污水的处理能力.结果表明,过滤压差对动态膜的形成及出水通量的影响比较复杂,10min～2h出水通量随过滤压差增大而增大,但48h后出水通量随过滤压差增大而减小.研究还发现,系统稳定运行后出水通量随膜表面错流速度增大而增大.综合分析,本试验选取过滤压差为0.04MPa为最优过滤压差,动态膜40min内可形成且保持稳定.反应器稳定运行后,出水水质良好,对COD、NH3-N、TN、TP的平均去除率分别为96.68%、96.64%、71.46%、57.80%,出水浊度1.0以下.A new recirculated dynamic membrane bio-reactor was built by industrial filter cloth of 30μm-I. D. and stainless steel sleeve using rigid PVC pipe as support body. The effects of different filtration pressure on the forming of dynamic membrane, membrane flux and turbidity, as well as the purification capacity of domestic wastewater were investigated. The results demonstrated that the impact of filtration pressure on forming of dynamic membrane and membrane flux was complicated, depicted by the escalation of water flux with increasing pressure within 2 h and decline after 48 h; in addition, membrane flux was found to ascend with the rise of cross-flow velocity on membrane surface during stable operation. An optimized filtration pressure of 0. 04 MPa was selected, whereby dynamic membrane could form within 40 min and maintained stable. The quality of processed water was good, average removal rate of COD, NH3-N, TN and TP were 96. 68%, exceeded 1.0. 96. 64%, 71. 46% and 57. 80%, respectively, turbidity neverexceeded 1.0.

关 键 词：外置式动态膜生物反应器 生活污水 膜出水通量 

分 类 号：X703[环境科学与工程—环境工程] TQ028.8[化学工程]