混凝—紫外光催化氧化法处理垃圾渗滤液的模拟试验  

Simulation test on treatment of landfill leachate by coagulation-UV-photocatalysis-fenton-oxidation process

作　　者：成一知 纪智慧 朱健 池年平 

机构地区：[1]湖南华亿市政工程设计有限公司,湖南株洲412002 [2]中南林业科技大学环境科学与工程研究所,湖南长沙410004

出　　处：《中南林业科技大学学报》2011年第1期86-90,共5页Journal of Central South University of Forestry & Technology

基　　金：湖南省重点学科基金项目(2006186);长沙市科技局计划项目(k0803202-11)

摘　　要：研究了混凝—紫外光催化氧化法对含有大量难降解有机物垃圾渗滤液的处理效果,考察了混凝pH值、混凝剂用量、搅拌强度及光催化氧化pH值、Fe2+用量、H2O2/Fe2+摩尔比及反应时间7个因素对CODcr去除率的影响。结果表明,这7个因素对CODcr去除率有明显的影响。混凝试验的最优条件为:PAM用量为5 mg.L-1,PAC用量为800 mg.L-1,pH值为5,搅拌速度为200 r.min-1;紫外光催化氧化试验的最优条件为:pH值为3,Fe2+的用量为0.01 mol.L-1,nH2O2/nFe2+为10∶1,反应时间为60 min。在工艺优化的条件下,垃圾渗滤液原水CODcr的浓度为3 500 mg.L-1,处理后CODcr的浓度为82.95 mg.L-1,CODcr去除率可达到97.6%,药剂处理费用为2.25元/t,适合于小城镇垃圾填埋场垃圾渗滤液的处理。The treatment efficiency of coagulation-UV-Fenton reagent method on treating landfill leachate containing non biodegradable organic contaminants was studied.The effects of pH,dosage of PAC,dosage of PAM,stirring intensity,dosage of Fe2＋,molar ratio of H2O2/Fe2＋ and reaction time on CODcrclearance rate were investigated.The result shows that the optimal state of PAM dosage=5 mg·L-1,the dosage of PAC=800 mg·L-1,pH=5,stirring intensity=200 r·min-1;pH=3,the dosage of Fe2＋=0.01 mol·L-1,nH2O2/nFe2＋=10 ∶1,reaction time=60 min.These seven factors have significant impacts on the treatment efficiency of CODcr.In case the influent CODcr concentration is 3 500 mg·L-1,after these treatment processes,the effluent CODcr concentration is 82.95 mg·L-1,the removal rate of CODcr is 97.6%,chemical costs 2.25 yuan/t.This process is suitable for small town landfill leachate treatment.

关 键 词：垃圾渗滤液 混凝 紫外光催化氧化 去除率 

分 类 号：X52[环境科学与工程—环境工程]