KMnO_4强化混凝——超滤技术处理西北村镇集雨窖水研究  

KMnO_4 enhanced treatment of cellar rainwater by coagulation-ultrafiltration process in northwest towns of China

作　　者：武福平[1] 焦相伟 冯霖[1] 王艳琴[1] 王梦茹[1] 赵奇奇 WU Fuping;JIAO Xiangwei;FENG Lin;WANG Yanqin;WANG Mengru;ZHAO Qiqi(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou Gansu 730070)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《环境污染与防治》2018年第9期970-973,978,共5页Environmental Pollution & Control

基　　金：国家重点研发计划项目(No.2016YFC0400703);国家自然科学基金资助项目(No.51768031);甘肃省重点研发计划项目(No.17YF1NA056)

摘　　要：针对西北村镇集雨窖水低温、低浊、微污染,且常规混凝—超滤技术处理效果不佳的问题,采用KMnO_4强化混凝—超滤技术处理集雨窖水,考察了KMnO_4投加量对去除污染物的强化效果。结果表明,KMnO_4的最佳投加量为1.0mg/L,预氧化5min后,高锰酸盐指数、出水在254nm处吸光度(UV_(254))、氨氮、TP和浊度的去除率分别达26.7%、25.8%、51.4%、75.0%、96.8%,与常规混凝—超滤技术相比,KMnO_4预氧化可使高锰酸盐指数及UV_(254)的去除率分别提高约6、5百分点。KMnO_4预氧化可以有效提高常规混凝—超滤技术的出水水质,强化对有机污染物的去除效果,但对氨氮、TP、浊度去除的强化效果较弱。In view of the low temperature,low turbidity and micro-pollution of cellar rainwater in northwest towns of China,and the poor effect of conventional coagulation-ultrafiltration process treatment on cellar rainwater,the combined process of KMnO4 pre-oxidation and coagulation-ultrafiltration was used to treat cellar rainwater.The effect of KMnO4 dosage on the removal of pollutants by coagulation-ultrafiltration process was investigated.The results showed that the optimum dosage of KMnO4 was 1.0 mg/L,and after pre-oxidation for 5 min,the removal rates of permanganate index,absorbance of effluent at 254 nm(UV 254),ammonia nitrogen,TP and turbidity were 26.7%,25.8%,51.4%,75.0%,and 96.8%,compared with the conventional coagulation-ultrafiltration process,the removal rate of permanganate index and UV 254 increased by about 6 percentage points and 5 percentage points.KMnO4 pre-oxidation could effectively improve the effluent quality by the coagulation-ultrafiltration process and enhance the removal of organic pollutants,but the effect on ammonia nitrogen,TP and turbidity removal was relative weak.

关 键 词：集雨窖水 KMNO4 混凝 超滤 

分 类 号：TU991.2[建筑科学—市政工程]