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.
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)
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).
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
drinking water treatment
micro-polluted water
KMnO_(4)pre-oxidation
coagulation sedimentation
control technology
