混凝-气浮控制三卤甲烷生成势的研究  

Control of trihalomethanes formation potential by coagulation-dissolved air flotation process

作　　者：孙晓明[1] 王启山[2] 乔琦[1] 刘景洋[1] 

机构地区：[1]中国环境科学研究院国家环境保护生态工业重点实验室,北京100012 [2]南开大学环境科学与工程学院,天津300071

出　　处：《环境工程学报》2011年第11期2508-2512,共5页Chinese Journal of Environmental Engineering

基　　金：国家“水体污染控制与治理”科技重大专项(2009ZX07208-002);国际科技合作项目(2010DFB90590)

摘　　要：研究了混凝-气浮工艺对不同分子量区间三卤甲烷生成势(trihalomethanes formation potential,THMFP)的去除效果及絮体形态对THMFP去除效果的影响。结果表明,混凝-气浮工艺以去除大分子量区间THMFP为主,对小分子量区间THMFP的去除效果较差。UV254值与THMFP值的线性相关系数为0.9449,UV254值可以较好地反映THMFP的含量。絮体的分形维数为1.17～1.2时,孔隙率较大,可增加絮体对THMFP的活性吸附空间,且絮体相对密度较小,可增强同向絮凝作用,增加絮体和THMFP的接触概率,有利于气浮对THMFP的去除。The removal efficiency of coagulation-dissolved air flotation （DAF） process on trihalomethanes formation potential （THMFP） with different molecular weight ranges was studied, and the effect of floc form on the removal efficiency of THMFP was also investigated. The results show that the coagulation-DAF process mainly removes the THMFP of larger molecular weight range, while the removal efficiency of THMFP of smaller molecu- lar weight range is poor. The linear correlation coefficient between UV254 and THMFP is 0. 9449, which indicates that UV254 can reflect the content of THMFP. When the floe fractal dimension is within the range of 1.17 - 1.2, the porosity is larger which increases the activated adsorption space of floe form to THMFP ; and the relative density of floe form is smaller which improves the orthokinetic flocculation and increases the contact probability of floc form and THMFP. These factors greatly enhance the removal efficacy of THMFP.

关 键 词：混凝气浮 三卤甲烷生成势 分子量分布 絮体形态 

分 类 号：TU991[建筑科学—市政工程]