分级共聚气浮对引黄水库水中污染物的去除特性  

Removal of Pollutants in Reservoir Water Derived from Yellow River by Two-grade Co-DAF Process

作　　者：张克峰[1] 贾伟建[1] 张茜雯[2] 王永磊[1] 李梅[1] 贾瑞宝[3] 

机构地区：[1]山东建筑大学市政与环境工程学院,山东济南250101 [2]宾夕法尼亚州立大学州府分校 [3]济南市供排水监测中心,山东济南250100

出　　处：《中国给水排水》2014年第23期29-33,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07404-003-006);住房和城乡建设部科学技术项目(2014-K5-026);山东省住房和城乡建设厅科技计划项目(KY022)

摘　　要：以鹊山引黄水库低温低浊水为研究对象，自主研发了分级共聚气浮工艺，将溶气水分级回流，以强化气浮粘附机制中的共聚作用。考察了分级共聚气浮工艺的运行特性及处理效果，研究表明：在原水浊度为13．3～20．2NTU的条件下，PAFC投量为5mg／L（以Al^3＋计）、溶气水初次回流所占比例为1／3、共聚紊动强度为10s^-1时，运行效果较优。对粒径〉2μm颗粒物的去除率为93．6％，对分子质量〉3000U的有机物去除率可达85％，对分子质量为3000～10000U有机物的去除率为30．6％，对消毒副产物生成势（DBPFP）具有良好的控制作用。试验过程中，对浊度、CODMn、UV254、DOC、SUVA及氨氮的去除率分别为95．2％、43．2％、48．5％、38．2％、20．5％和77．3％，对CHCl3、CHClBr2、CHCl2Br、CHBr3的去除率分别为22．9％、21．9％、16．0％及18．2％。通过对反应过程的不同阶段进行显微观测，确定分级共聚气浮对污染物的去除机制主要有微气泡与絮体颗粒的碰撞粘附作用、微气泡与絮体颗粒的共聚作用及泡絮体-微气泡-颗粒物之间的网捕、包卷和架桥作用。According to the characteristics of low-temperature and low-turbidity reservoir water derived from Yellow River, a new two-grade co-DAF process was developed, in which reflux water was added separately, and eopolymerisation in flotation adhesion mechanism was enhanced. The operating performanee and treatment efficiency of the two-grade co-DAF process were investigated. The results showed that the process performed well at raw water turbidity of 13.3 to 20.2 NTU, PAFC dosage of 5 mg/L （calculated as Al^3＋ ） , first reflux water ratio of 1/3 and eopolymer turbulence intensity of 10 s^-1. The removal rates of particles more than 2 μm, organics with molecular weight above 3 000 u and between 3 000 and 10 000 u were 93.6%, 85% and 30.6%, respectively. Meanwhile the DBPFP was controlled well. During the test, the removal rates of turbidity, CODMn, UV254, DOC, SUVA and ammonia nitrogen were 95.2%, 43.2%, 48.5%, 38.2%, 20.5% and 77.3%, while the removal rates of CHCl3, CHClBr2, CHCl2Br and CHBr3 were 22.9% , 21.9% , 16.0% and 18.2% , respectively. The microscopic observation of different reaction phases indicated that the mechanisms for pollutant removal were consisted of collision, adhesion and copolymerization of microbubbles with floc particles as well as meshing, adsorption and bridging among microbubbles, floc particles and bubble flocs.

关 键 词：分级共聚气浮 引黄水库水 去除特性 消毒副产物生成势 

分 类 号：TU991.2[建筑科学—市政工程]