Evaluation of Fenton Process for the Treatment of Sanitary Landfill Leachate with Response Surface Methodology
响应面法分析卫生填埋渗滤液的Fenton处理过程

Response Surface Methodology (RSM) was employed to investigate the effect of TOC ratio of high molecular weight organic matter (HMWOM) to low molecular weight organic matter (LMWOM), the LMWOM concentration and hydrogen peroxide to ferrous ion molar ratio on COD removal during the treatment of sanitary landfill leachate with Fenton reagents. The high and low levels of HMWOM/LMWOM, the LMWOM concentration and H2O2/Fe2+ were from 14 to 38, 975 to 3000 mg/L, and 1.75 to 4.00 respectively. Using the software of Design-Expert 5, a response surface quadratic model in terms of actual factors was obtained based on the experimental data, and COD removal contour plots were derived from the model accordingly. It showed that COD removal increased with the increase of HMWOM to LMWOM ratio, but decreased with increasing LMWOM concertration. There existed an optimal hydrogen peroxide to ferrous ion molar ratio so that the highest COD removal efficiency could be achieved.