气浮-混凝-Fenton氧化处理垃圾渗滤液动态模拟研究

采用气浮-混凝-Fenton氧化组合工艺对垃圾渗滤液进行处理。试验研究结果表明,最佳气浮条件:气水比为45～60mL/L、氧化石蜡皂用量为300mg/L、气浮时间为15min;最佳混凝条件:PAM投加量为9mg/L、PAC投加量为1100mg/L、pH值为5、搅拌强度为200r/min;最佳Fenton氧化条件:pH值为3,Fe2+投加量为0.04mol/L,n(H2O2)/n(Fe2+)为15,反应时间为90min。垃圾渗滤液经过气浮-混凝-Fenton氧化处理后COD、NH3-N得到了较好的去除,最终出水COD、NH3-N、TP可达《生活垃圾填埋场污染控制标准》(GB16889—2008)中的排放浓度限值。

Dynamic simulation of landfill leachate treatment by air flotation-coagulation-Fenton oxidation

Air flotation-coagulation-Fenton oxidation combined process was used to treat landfill leachate.The results showed that,the optimal condition for air flotation was:the gas-water ratio was 45-60 mL /L,the oxidized paraffin soap dosage was 300 mg /L,the air-flotation time was 15 min;the optimal condition for coagulation was:the dosage of PAM and PAC were 9 and 1 100 mg /L respectively,the pH value was 5,the stirring intensity was 200 r /min;the optimal condition for Fenton oxidation was:the pH value was 3,the Fe2+ dosage was 0.04 mol /L,the n(H2O2) /n(Fe2+) was 15,the reaction time was 90 min.The COD and NH3-N could be effectively removed through the air flotation-coagulation-Fenton oxidation treatment,the mass concentrtion of COD,NH3-N and TP of ultimate effluent could approach to the discharge limit of Standard for Pollution Control on the Landfill Site of Municipal Solid Waste(GB 16889—2008).