Fe/C微电解-Fenton氧化联合处理垃圾渗滤液  

ADVANCED TREATMENT OF SOLID WASTE LANDFILL LEACHATE BY A COMBINED PROCESS OF Fe/C MICROELECTROLYSIS-FENTON OXIDATION

作　　者：李秋华 汪群慧 LI Qiuhua;WANG Qunhui(School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Biotechnology and Health Sciences,Wuyi University,Jiangmen 529020,China)

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]五邑大学生物科技与大健康学院,广东江门529020

出　　处：《环境工程》2022年第3期18-23,共6页Environmental Engineering

基　　金：国家重点研发计划(2018YFC19001003);江门市基础与理论研究科技计划项目(2016030100270007378,2017030100620016213);广东省自然科学基金(2017A030313319);广东教育厅特色创新项目(2015KTSCX142);国家级大学生创新项目(2016年度)。

摘　　要：采用Fe/C微电解-Fenton氧化联合工艺处理某固体废弃物处理企业填埋区的垃圾渗滤液,以降低其COD与浊度值,并去除渗滤液中的重金属离子。结果表明:当pH=4~5,铁炭复合材料投加量为30~40 g/L,曝气量为40 L/min,水力停留时间(HRT)为1 h时,微电解方法对垃圾渗滤液中的Ni^(2+)、Cr(Ⅵ)、Pb^(2+)的去除效果较好,其去除率分别达到96%、97%和96%,垃圾渗滤液色度去除率为92.41%,COD去除率为62.33%,浊度由40.73NTU降至3.09 NTU,COD由579.2 mg/L降至218.16 mg/L。对微电解工艺出水进一步采用Fenton氧化工艺处理,结果表明:当Fe^(2+)浓度为0.007 mol/L,氧化时间为90 min,n(H_(2)O_(2))∶n(Fe^(2+))=1.2∶1条件下,COD去除率为67.50%,浊度为53.20%,处理后的出水浊度为1.47 NTU、COD为69.49 mg/L,达到GB 18918—2002《城镇污水处理厂污染物排放标准》的二级排放标准。The late-stage waste infiltration fluid from the solid waste landfill in Jiangmen was treated by a combined process of Fe/C micro electrolysis-Fenton oxidation,to reduce COD,turbidity value and the concentration of heavy metal ions in the leachate.Results showed that under the condition of pH between 4 and 5,dosage of iron-carbon composite of 30~40 g/L,aeration volume of 40~60 L/min,the hydraulic retention time(HRT) of 1 hour,the removal rate of Ni^(2+),Cr(Ⅵ) and Pb^(2+) in waste leachate was 96%,97% and 96% respectively,the removal rate of the leachate turbidity and COD was 92.41% and 62.33% respectively,the turbidity decreased from 40.73 NTU to 3.09 NTU,and the COD decreased from 579.2 mg/L to 218.16 mg/L.In further Fenton oxidation treatment,research results showed that under the condition of Fe^(2+)concentration of 0.007 mol/L,oxidation time of 90 min,n(H_(2)O_(2))∶n(Fe^(2+))=1.2∶1,the removal rate of the COD and turbidity was 67.50% and 53.20% respectively,the value of turbidity was 1.47 NTU,the value of COD was 69.49 mg/L,reaching the Rank Ⅱ limiting value of China’s National Standard of Sewage discharge(GB18918—2002).

关 键 词：FE/C微电解 FENTON氧化 重金属 垃圾渗滤液 COD 

分 类 号：X703[环境科学与工程—环境工程]