快速磁絮凝工艺的后絮凝现象分析及控制技术研究  

Investigation and Control Technology of Subsequent Flocculation from Rapid Magnetic Flocculation Process

作　　者：刘文彬[1,2] 肖志伟[3] 白茹真 房宏艳 王捷[1,2] LIU Wen-bin;XIAO Zhi-wei;BAI Ru-zhen;FANG Hong-yan;WANG Jie(School of Environmental and Chemical Engineering,Tianjin Polytechnic University,Tianjin 300387 ,China;Tianjin Engineering Center for Safety Evaluation of Water Quality & Safeguards Technology,Tianjin Polytechnic University,Tianjin 300387 ,China;Environmental Protection Center < Ministry of Transport > ,Beijing 100013 ,China)

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]天津工业大学天津市水质安全评价与保障技术工程中心,天津300387 [3]交通运输部环境保护中心,北京100013

出　　处：《中国给水排水》2019年第19期87-92,共6页China Water & Wastewater

基　　金：国家自然科学基金资助面上项目(51378349);天津市科技计划项目(14ZCDGSF00128)

摘　　要：针对某磁絮凝装置应急处理黑臭水体出水的后絮凝问题,基于现场使用的混凝药剂聚合氯化铝(PAC)和聚丙烯酰胺(PAM)设计试验,利用红外光谱分析等手段,证实后絮凝现象与高分子助凝剂PAM的投加量直接相关。通过分析上清液Zeta电位等指标,确定最优操作条件如下:PAC投量为50mg/L,PAM投量为0.5~2mg/L,沉降15~30min,该条件可有效保证混凝效果,减少出水后絮凝现象,保障磁絮凝装置处理黑臭水体的出水水质稳定达标。To solve the subsequent flocculation of effluent from a magnetic flocculation device for the treatment of the malodorous black water, a series of experiments were carried out on the coagulant (PAC) and coagulant aid ( PAM) used at site. FTIR results showed that the phenomenon of subsequent flocculation was directly related to the PAM dosage. The Zeta potential values of supernatant were analyzed, and the optimal condition were determined, which had 50 mg/L PAC, 0.5-2mg/L PAM, and 15-30 min settling time. The phenomenon of subsequent flocculation was effectively decreased and the effluent quality of malodorous black water was ensured.

关 键 词：黑臭水体 快速磁絮凝工艺 后絮凝 聚丙烯酰胺 浊度 ZETA电位 

分 类 号：TU992[建筑科学—市政工程]