摘要
采用电解芬顿法深度处理老龄垃圾渗滤液，选取电量、进水 pH 值、进水氨氮浓度3个因素为变量，CODCr 去除率为响应值进行 Box-Behnken 中心组合设计。利用响应面法对试验结果进行分析，建立了 CODCr 去除率为响应值的二阶多项式模型并进行了方差分析和显著性检验，通过解模型逆矩阵得到最佳条件：单位面积电量为23．26 Ah／dm2、pH 值为3．58、进水氨氮浓度56．78 mg／L。在最佳条件下，CODCr 去除率为96．5％，与模型预测值偏差为4．45％，吻合度较高。对电解芬顿深度处理前后的渗滤液进行 GC-MS 分析，表明电解芬顿协同处理技术能有效降解垃圾渗滤液中难生化降解的有机物，将有机物种类从42种降低至21种，是较有效的深度处理技术。
Abstract
The electro-fenton process was employed in the advanced treatment of Mature landfill leachate.Power, initial pH,and initial ammonia-nitrogen concentration were selected as the variables and CODCr removal efficiency were used as the response in the central composite design (CCD).Response surface methodology (RSM)was used for the analysis of the experimental results.A second-order polynomial regression equation was developed to describe the CODCr removal efficiency and was validated by variance and significance test.The optimum reaction conditions were determined by calculate inverse matrices of regression equation.The results showed that under the optimum reaction conditions (power dosage of 23.26 Ah/dm2 ,initial pH value of 3.58 and initial ammonia-nitrogen dosage of 56.78 mg/L),the CODCr removal efficiency was 96.5%,which was highly consistent with value predicted by the model equation,with a deviation of 4.45%.GC-MS method was used in analysing landfill leachate treated by electro-fenton,comparing with landfill leachate treated by conventional treatment process,it is indicated that the electrolytic Fenton technology can effectively degrade the refractory organics in landfill leachate.The result showed that electrolytic Fenton technology was effective advanced treatment.
基金项目
水体污染控制与治理科技重大专项(2008ZX07315-003)
NETL
NSTL
维普
万方数据