基于降低拉森指数的再生水混凝处理工艺优化研究  

Research on the optimization of reclaimed water coagulation treatment process by reducing the Larson index

作　　者：冯萃敏[1] 刘丹丹 米楠[1] 尹晓星[1] 张雅君[1] 

机构地区：[1]北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室,北京100044 [2]中国建筑设计院有限公司,北京100044

出　　处：《工业水处理》2015年第12期48-52,共5页Industrial Water Treatment

基　　金：国家自然科学基金项目(51278026)

摘　　要：针对城市再生水输配管线的腐蚀控制问题,通过监测水中浊度、氯离子、硫酸盐、碳酸氢根,调节混凝过程最佳运行工况,控制拉森指数以减轻管网腐蚀。实验结果表明,最佳混凝剂为PAC,最佳投加量为12 mg/L,最佳混凝条件为快搅60 s、速度300 r/min,慢搅15 min、速度60 r/min,沉淀时间30 min。在此工况下拉森指数为0.999,能够有效控制管网腐蚀,减小后续工艺压力。Aiming at the corrosion control problem of urban reclaimed water distribution pipeline,by monitoring the water turbidity,chloride,sulfate,and bicarbonate,the best operation conditions in the process of coagulation are adjusted and Larson index is controlled to alleviate the pipeline corrosion. The experimental results show that the optimum coagulant is PAC,whose optimal dosage is 12 mg/L,the best coagulation conditions are as follows：rapid stirring time is 60 s,rapid stirring rate 300 r/min,slow stirring time 15 min,slow stirring rate 60 r/min,and settling time 30 min. Under the above conditions,Larson index is 0.999,being able to control the reclaimed water pipeline corrosion, and reduce the pressure in the subsequent process.

关 键 词：拉森指数 混凝 再生水 管网腐蚀 

分 类 号：TU991[建筑科学—市政工程]