沉淀、气浮对THMs和THMFP的去除效果研究  

Removal Effect of THMs and THMFP by DAF and Sedimentation Process

作　　者：孙晓明[1,2] 王启山[1,2] 朱文姝[1,2] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]广西环境工程与保护评价重点实验室,广西桂林541004

出　　处：《中国给水排水》2009年第17期54-56,共3页China Water & Wastewater

基　　金：广西环境工程与保护评价重点实验室研究基金资助项目(桂科能0804K024)

摘　　要：分别采用混凝/气浮、混凝/沉淀工艺处理天津某水厂预氯化水,考察了两种工艺对预氯化水中三卤甲烷(THMs)及三卤甲烷生成势(THMFP)的去除效果。结果表明,混凝/气浮工艺对THMs、THMFP的去除率分别为37%、55%,较混凝/沉淀(19%、34%)工艺分别提高了18%、21%;经气浮处理后,自来水的UV254/TOC值明显降低,即大大降低了THMFP在有机物中所占的比例,从而能够有效降低后续氯消毒工艺中THMs的生成量;混凝/气浮工艺对藻类的去除效果较混凝/沉淀工艺的好,其在较高ξ电位时就能取得较好的除藻效果。The coagulation/dissolved air flotation （DAF） process and coagulation/sedimentation process were used to treat the prechloridized water in a waterworks of Tianjin, and the removal efficiency of trihalomethanes （THMs） and trihalomethane formation potential （THMFP） was investigated. The resuits show that the removal rates of THMs and THMFP by coagulation/DAF process are 37% and 55% respectively, being 18% and 21% higher than those by coagulation/sedimentation process （19% and 34% ）. After DAF process, the ratio of UV254/TOC in water is decreased significantly, which shows that the proportion of THMFP in organic mater is decreased significantly, and the formation of THMs during the follow-up chlorination disinfection process is reduced obviously. The removal effect of algae by coagulation/DAF process is better than that by coagulation/sedimentation process, and the removal effect of algae is better at high §-potential.

关 键 词：三卤甲烷 三卤甲烷生成势 混凝 气浮 沉淀 

分 类 号：TU991.2[建筑科学—市政工程]