UASB+MBR+NF+RO工艺处理电厂垃圾渗滤液的效果分析

EFFECT ANALYSIS OF TREATMENT OF LANDFILL LEACHATE FROM A MSW INCINERATION PLANT USING COMBINED USAB+MBR+NF+RO PROCESS

采用"预处理+UASB+MBR+NF+RO"工艺处理某生活垃圾焚烧厂渗滤液,工程规模为250 m^3/d,以该电厂一年的污水处理监测数据为依据,分析该工艺以及各处理单元(UASB、MBR和膜系统)对垃圾渗滤液主要污染物的去除效果。结果表明:UASB对COD、BOD_5、NH_3-N、TP和色度的平均去除率分别为83.29%、73.76%、-0.29%、21.04%和64.84%;MBR对COD、BOD_5、NH_3-N、TP和色度的平均去除率分别为87.48%、99.58%、97.22%、90.94%和34.65%;膜系统对COD、BOD5、NH3-N、TP和色度的平均去除率分别为96.56%、63.15%、90.65%、94.81%和98.18%;"预处理+UASB+MBR+NF+RO"组合工艺对COD、BOD_5、NH_3-N、TP和色度的平均去除率分别为99.93%、99.96%、99.74%、99.65%和99.80%,出水平均水质达到《城镇污水处理厂污染物排放标准》一级A排放标准。

A combined process of pretreatment ＋ UASB ＋ MBR ＋ NF ＋ RO was applied to treat the landfill leachate from a MSW Incineration Plant in Zhejiang Province. The designed scale was 250 m-3/d. The removal efficiencies of main pollutants by this combined process and each treatment unit were analyzed based on one-year monitoring data of this plant.The results showed that the UASB process removed 83.29 % of COD, 73.76 % of BOD5,-0.29 % of NH3-N, 21.04 % of TP and 64.84 % of chromaticity, respectively. The MBR process removed87.48 % of COD, 99.58 % of BOD5, 97.22 % of NH3-N, 90.94 % of TP and 34.65 % of chromaticity, respectively. The Membrane system process removed 96.56 % of COD, 63.15 %of BOD5, 90.65 % of NH3-N, 94.81 % of TP and 98.18 % of chromaticity, respectively. The combined process of pretreatment ＋ UASB ＋ MBR ＋ NF ＋ RO removed 99.93 % of COD,99.96 % of BOD5, 99.74 % of NH3-N, 99.65 % of TP and 99.80 % of chromaticity,respectively. The effluent quality satisfied the Standard I-A of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant.