余氯量对城市污水再生利用中混凝过程的影响研究  

Study on Effect of Residual Chlorine on Coagulation in Municipal Wastewater Reclamation and Reuse

作　　者：王志鹏[1] 罗奕凯[2] 韩芸[1] 巨姗姗[1] 王志盈[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]国家开发银行陕西省分行,陕西西安710075

出　　处：《中国给水排水》2008年第13期52-54,57,共4页China Water & Wastewater

基　　金：陕西省教育厅专项科研计划项目(05JK231)

摘　　要：利用颗粒粒径分布和分子质量分布,考察了二级出水预加氯含量对后续混凝效果的影响。试验结果表明,在二级出水的深度处理中,以PAC为混凝剂(投量为50mg/L)、PAM为助凝剂(投量为0.25mg/L)时,水体的余氯量对后续混凝效果有显著影响,当余氯量≤2.12mg/L时,余氯量的增加对混凝过程起到了一定的促进作用;当余氯量>2.12mg/L时,絮凝效果随余氯量的增加而有所下降。因此,在污水再生利用中应该严格控制二级出水的余氯量,以保证再生水水质。The effect of residual chlorine in pre-chlorinated secondary effluent on subsequent coagulation was investigated by observing its size and molecular weight distributions. The results show that the effect of residual chlorine on coagulation is significant when PAC is 50 mg/L and PAM is 0.25 mg/L in advanced treatment of secondary effluent. When the concentration of residual chlorine is below 2.12 mg/L, coagulation is improved. However, when the concentration of residual chlorine is above 2.12 mg/L, coagulation is deteriorated. Thus, the concentration of residual chlorine in secondary effluent should be strictly controlled to insure reclaimed wastewater quality.

关 键 词：城市污水二级出水 余氯量 粒度分布 分子质量分布 

分 类 号：X703.1[环境科学与工程—环境工程]