净水厂KMnO_(4)预氧化混凝沉淀处理的工艺控制技术  

Control technology of KMnO_(4) pre-oxidation coagulation sedimentation process in water treatment plant

作　　者：孙俊伟 赵红星 徐晓平 赵守慧 阮仁俊 陶开燕 SUN Jun-wei;ZHAO Hong-xing;XU Xiao-ping;ZHAO Shou-hui;RUAN Ren-jun;TAO Kai-yan(School of Architecture and Civil Engineering,Anhui Polytechnic University,Wuhu 241000,China;School of Chemical and Environmental Engineering,Anhui Polytechnic University,Wuhu 241000,China)

机构地区：[1]安徽工程大学建筑工程学院,芜湖241000 [2]安徽工程大学化学与环境工程学院,芜湖241000

出　　处：《武汉轻工大学学报》2022年第2期38-43,共6页Journal of Wuhan Polytechnic University

基　　金：国家自然科学基金项目(编号:51978001);安徽省高校自然科学基金项目(编号:KJ2020A0365);安徽工程大学科研项目(编号:Xjky110201903);安徽省大学生创新创业计划项目(编号:S202010363365).

摘　　要：本研究以某水库水为研究对象,以其浊度为主要控制指标,对KMnO_(4)投加量、混凝剂种类和投加量进行了优化,同时考察了pH值对混凝沉淀的影响。研究结果表明:试验水质条件下,采用KMnO_(4)对原水进行预处理会导致浊度升高,但有利于降低混凝沉淀出水浊度;KMnO_(4)投加量应控制在2.2 mg/L以下,过高会导致出水携带色度;聚合氯化铝作为混凝药剂更适合于KMnO_(4)预处理后的水质,其投加量在30~50 mg/L时,混凝沉淀效果较好,其中投加40mg/L为最佳;水中pH值为7.5左右时,混凝沉淀效果较好,pH值过大或过小均会降低混凝沉淀效果。KMnO_(4)的预处理可使原水的pH值更有利于混凝沉淀,降低净水厂调节pH的需求。Taking a reservoir water as the research object,and turbidity as the main control index,the dosage of KMnO_(4),coagulant type and dosage were optimized,and the effect of pH on coagulation sedimentation was investigated.Results showed that the pretreatment of raw water with KMnO_(4) increased the turbidity of water but effectively reduced the turbidity of precipitated effluent water.The dosage of KMnO_(4) should be controlled below 2.2 mg/L,otherwise it would lead to increased turbidity of effluent.As a coagulant,polyaluminum chloride was more suitable for KMnO_(4) pretreated water.Coagulation and precipitation results were better than other dosage when the dosage was 30-50 mg/L,and the optimal dosage was 40mg/L.When the pH of water was about 7.5,the coagulation and precipitation effect was better,otherwise the treatment effect would be reduced.At the same time,it was found that pretreatment of KMnO_(4) could make the pH of water more conducive to coagulation and precipitation,and reduce the demand of adjusting pH for water treatment plant.

关 键 词：饮用水处理 微污染原水 KMnO_(4)预氧化 混凝沉淀 控制技术 

分 类 号：TQ9[化学工程]