Fenton反应处理垃圾渗滤液MBR处理出水的混凝作用机理研究  

Coagulation mechanism of the Fenton's oxidation process treating the landfill leachate

作　　者：吴成强[1] 陈士南 赵宝东 周美芝[1] 张爱国[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032 [2]桐昆集团浙江恒通化纤有限公司,浙江桐乡314513

出　　处：《浙江工业大学学报》2012年第5期484-487,共4页Journal of Zhejiang University of Technology

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07101-006);杭州市科技局科技攻关项目(0012006009057)

摘　　要：采用Fenton反应处理经膜生物反应器预处理后的垃圾渗滤液,初步探讨了其氧化和混凝作用机理.结果表明:Fenton反应处理该渗滤液时,混凝作用贡献高于氧化作用.当COD总去除率为80%时,氧化去除率仅为20%;在混凝反应阶段,pH最佳值的适宜范围为3.2～5.0;该pH值随着硫酸亚铁用量增加而升高,而随双氧水用量增加先升高后逐渐降低.Fenton反应的混凝作用机理主要以吸附网捕作用为主,能够选择性地去除腐殖质,当pH越低时,大分子腐殖质越容易被去除.The mechanism of Fenton＇s oxidation and coagulation was studied for the pretreatment of the landfill leachate with MBR. It was found that the coagulation played more important role than the oxidation in the process. A total COD removal rate of 80 % was achieved by coagulation and only 20% by oxidation. In the coagulation stage of Fenton＇s oxidation process, the optimal range of pH was 3.2-5.0 with the different dosage of agents. The optimum pH increased with increasing the dosage of FeSO4, but firstly increased and then decreased with the increase of H2O2. The main mechanism of coagulation was the adsorption bridge building in the Fenton＇s oxidation process. Humic substances with large molecular sizes were selectively removed more easily at low pH.

关 键 词：FENTON 垃圾渗滤液 混凝作用 

分 类 号：X703.1[环境科学与工程—环境工程]