微电解集成设备预处理垃圾渗滤液

采用自制微电解集成设备研究不同反应条件下对成都市长安垃圾场垃圾渗滤液的处理效果。试验主要条件为1∶1铁碳体积比填料、停留时间、极板电压、电极正负交换周期和曝气量等动态单因素。在垃圾渗滤液的初始p H条件下试验得到最佳反应参数:停留时间为120 min、电压为25 V、电极正负交换周期30 s、曝气量2 000 L/h时,对垃圾渗滤液COD、NH3-N和色度的初始去除率分别41.38%、24.52%和60.00%。经重复试验,该微电解集成设备对垃圾渗滤液有较为稳定的处理能力,可为垃圾渗滤液的预处理工程设计提供选择性参考。

PRETREATMENT OF LANDFILL LEACHATES BY MICRO-ELECTROLYSIS INTEGRATED EQUIPMENT

A self-made micro-electrolysis integrated equipment was applied in the pretreatment of landfill leachates fromChengdu Chang' an Waste Site and processing efficiencies under different reaction conditions were investigated． The keyconditions were dynamic single factors，such as packing material with iron-carbon volume ratio being 1∶ 1，hydraulic retentiontime，plate voltage，the positive and negative exchange cycle of electrodes，as well as aeration rate． With the initial pH oflandfill leachates，the optimal reaction parameters obtained were retention time of 120 min，plate voltage of 25 V，the positiveand negative exchange cycle of electrodes of 30 s and aeration rate of 2 000 L/h，under which the removal rate of COD，NH3－N and chroma were 41. 38%，24. 52% and 60. 00%，respectively． Several repeated tests indicated that the microelectrolysisintegrated device had a more stable capability in handling landfill leachates，and provides a selective reference forthe pretreatment engineering design of landfill leachates．