连续砂滤—超滤组合工艺的除污染效能与优化  

Pollutant Removal Efficiency and Optimization of Continuous Sand Filtration/Ultrafiltration Combined Process

作　　者：倪占鑫 李星[1] 杨艳玲[1] 李圭白 NI Zhanxin;LI Xing;YANG Yanling;LI Guibai(Beijing University of Technology,School of Architecture and Engineering,Beijing J00J24,China;Harbin Institute of Technology,school of Environmental,Harbin 150090,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]哈尔滨工业大学环境学院,黑龙江哈尔滨150090

出　　处：《水处理技术》2020年第1期115-119,125,共6页Technology of Water Treatment

基　　金：水体污染控制与治理科技重大专项课题(2012ZX07404-003)

摘　　要：构建了连续砂滤-超滤中试组合工艺,研究了其的除污染效能。结果表明,增加滤层厚度、降低滤速及延长洗砂周期均有助于提高连续砂滤的除污染效果。加氯反冲洗对超滤的除浊效果无影响,可以更有效地洗脱类腐殖质、类蛋白质以及微生物代谢产物等污染物,洗脱率比水力反冲洗的分别提高了57.9%、99.7%和107.3%,有效缓解了超滤的不可逆膜污染,超滤系统可以长期稳定运行,不需进行化学清洗。组合工艺的浊度去除效果极佳,出水浊度始终低于0.1 NTU;CODMn和UV254的去除率分别达34.2%和21.8%。连续砂滤有效控制了微污染原水的浊度和有机物含量,确保超滤系统可以稳定运行。研究成果可为微污染水源水的物化处理工艺提供技术支持。The continuous sand filtration/ultrafiltration combined process was constructed,and its removal efficiency for pollutant was studied.The results showed that,increasing the thickness of the filter layer,reducing the filtration rate and prolonging the sand washing cycle all contribute to the improvement of the pollutant removal efficiency of the continuous sand filter.Chlorination backwashing had no effect on the turbidity removal efficiency of ultrafiltration,it could more effectively elute pollutants such as humus,protein and microbial metabolites,and the elution rate was 57.9%,99.7%,and 107.3%higher than that of hydraulic backwashing respectively,better alleviated the irreversible membrane fouling of ultrafiltration.The ultrafiltration system could run stably for a long time without chemical cleaning.The turbidity removal effect of the combined process was excellent,the effluent turbidity was always lower than 0.1 NTU,and the removal rates of CODMn and UV254 were 34.2%and 21.8%,respectively.Continuous sand filtration effectively controls the turbidity and organic content of the micro-polluted raw water to ensure stable operation of the ultrafiltration system.The research results provide technical support for the physical and chemical treatment of micro-polluted source water.

关 键 词：连续砂滤 超滤 除污染效能 加氯反冲洗 膜污染控制 

分 类 号：TU991.24[建筑科学—市政工程] TQ028.8[化学工程]