短程絮凝-超滤处理初期雨水的效果研究  

Effect of Short-range Flocculation-ultrafiltration on Initial Rainwater Treatment

作　　者：雷晓玲[1,2] 张贺祥 魏泽军 杨程 Lei Xiaoling;Zhang Hexiang;Wei Zejun;Yang Cheng(Chongqing Jiaotong University, Chongqing 400074, China;Chongqing Academy of Science and Technology, Chongqing 401123, China)

机构地区：[1]重庆交通大学,重庆400074 [2]重庆科学技术研究院,重庆401123

出　　处：《环境科学与管理》2022年第1期73-78,共6页Environmental Science and Management

基　　金：重庆市社会民生科技创新专项cstc2016shmszx30019。

摘　　要：采用短程絮凝-超滤工艺联用工艺对初期雨水进行试验研究,优化了短程絮凝的反应条件,并与海绵城市建设中常用的生物滞留设施进行了径流污染控制的效果对比。试验结果表明,短程絮凝最优反应参数为絮凝剂(PAC)投加量6 mg/L,快速搅拌速度300 r/min,反应时间1 min,慢速搅拌速度150 r/min,反应时间6 min。该条件下联用工艺对道路初期雨水的COD_(cr)、SS、TP、UV254、TN、NH_(3)-N的平均去除率分别为73.35%、99.76%、98.43%、91.51%、28.99%、38.51%。其对COD_(cr)、SS、TP的去除率较传统生物滞留带分别提高了约15%、22%、13%。该工艺相比直接超滤,跨膜压差上升速率显著降低,压差降低水平约为28%。The preliminary rainwater was tested by short-range flocculation-ultrafiltration process.The reaction conditions of short-range flocculation were optimized,and the effect of runoff pollution control was compared with that of common biological detention facilities in sponge city construction.The results show that the optimum reaction parameters for short-range flocculation are:dosage of flocculant(PAC)6 mg/L,fast stirring speed 300 r/min,reaction time one min,slow stirring speed 150/min and reaction time 6 min.Under this condition,the average removal rates of COD_(cr),SS,TP,UV254,TN and NH_(3)-N of initial rainwater in road are 73.35%,99.76%,98.43%,91.51%,28.99%and 38.51%respectively.Its removal rates of COD_(cr),SS and TP were increased by about 15%,22%and 13%respectively to the traditional biological retention zone.Compared with direct ultrafiltration,the rise rate of transmembrane differential pressure is significantly lower and the decrease level of differential pressure is about 28%.

关 键 词：短程絮凝 超滤工艺 山地城市 初期雨水 

分 类 号：X505[环境科学与工程—环境工程]