絮凝方式及搅拌速度对污泥回流强化絮凝的影响  

Impact of Flocculation Mode and Stirring Rate on Enhanced Flocculation by Sludge Recycle

作　　者：柳斌[1] 于海宽 纪洪杰 于淑花 陈玲 董桂清 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]东营工大水环境技术有限公司,山东东营257091 [3]东营市自来水公司,山东东营257091

出　　处：《中国给水排水》2014年第19期58-60,共3页China Water & Wastewater

摘　　要：针对东营南郊引黄水库微污染原水，在不同絮凝方式及搅拌速度条件下，进行了污泥回流强化絮凝效能的研究。结果表明，当污泥回流量在5％～10％时，对絮凑毛／沉淀工艺的强化效果较好，此时，采用省略传统搅拌方式中的中速和慢速搅拌过程而仅在300r／min条件下快速搅拌50S的絮凝方式，对有机物的去除效果以及沉淀效能均优于传统絮凝方式，对DOC和UV254的去除率分别可达到42％和39％。Under conditions of different flocculation modes and stirring rates, a study on enhanced flocculation by sludge recycle was conducted to solve the problems of the micro-polluted raw water in Nanjiao reservoir in Dongying City. The results showed that when the sludge recycle flow was 5% to 10% , the enhanced efficiency of the flocculation/sedimentation process was good. The enhanced floccu- lation with rapid stirring for 50 s at 300 r/min and without medium and slow stirring process in the tradi- tional stirring mode had higher removal efficiency of organic matter and higher sedimentation efficiency than the conventional floeculation. The removal rates of DOC and UV254 achived 42% and 39% respec- tively.

关 键 词：给水处理 污泥回流 絮凝方式 搅拌速度 

分 类 号：X703[环境科学与工程—环境工程]