加载絮凝-超滤耦合工艺处理城镇生活污水的实验研究  

Experimental study on treatment of sanitary sewage by coupling technology of ballasted flocculation and ultrafiltration

作　　者：闻豪 赵旭涛 WEN Hao;ZHAO Xutao(Department of Infrastructure,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;Zhejiang Petrochemical Co.,Ltd.,Hangzhou 316000,China)

机构地区：[1]南京邮电大学基建处,江苏南京210023 [2]浙江石油化工有限公司,浙江杭州316000

出　　处：《工业水处理》2023年第5期129-134,共6页Industrial Water Treatment

基　　金：2020年度浙江省重点研发计划立项项目(2020A01010)。

摘　　要：在加载絮凝-超滤耦合工艺处理城镇生活污水过程中,考察聚合硫酸铁-聚二甲基二烯丙基氯化铵(PFS-PDMDAAC)絮凝剂对污染物的去除率及絮凝机理,并结合不同微砂投加量下絮体形态及滤饼层阻力特征,进一步探究其对膜通量衰减的影响作用机制。结果表明,PFS-PDMDAAC可有效去除蛋白类有机物,减少进入膜孔的污染负荷;在絮凝体系中投加微砂可促进形成尺寸大且结构较为密实的絮体,这种絮体滤饼层可有效减少膜的滤饼层阻力,从而减缓膜通量的衰减速率。During the sanitary sewage treatment process of ballasted flocculation and ultrafiltration,the removal efficiency and mechanism of pollutants by polyferric sulfate-poly(dimethyldiallylammonium chloride)composite flocculant(PFS-PDMDAAC)were investigated,respectively.Combined with floc morphology and cake layer resistance characteristics under different micro-sand dosages,the effect mechanism of PFS-PDMDAAC flocculant on membrane flux attenuation was further studied.The results indicated that PFS-PDMDAAC could effectively remove protein organic compounds,leading to effectively reducing pollution load into membrane pores.Moreover,the addition of micro-sand could promote the formation of flocs with large particle size and fractal dimension,which effectively reduced the cake layer resistance of the membrane,so it consequently slowed down the decay rate of membrane flux.

关 键 词：加载絮凝 城镇生活污水 滤饼层 超滤 膜污染 

分 类 号：X703.1[环境科学与工程—环境工程]