废铁屑耦合矿化垃圾反应床处理填埋场渗滤液研究

摘要

为了构建合理的废铁屑耦合矿化垃圾反应床工艺,分别进行了停留时间对铁屑处理填埋场渗滤液和矿化垃圾反应床出水的影响对比分析.并据此研究了前置铁屑固定床耦合矿化垃圾反应床处理填埋场渗滤液的效能.结果表明,在不进行pH调节的条件下,前置铁屑固定床和间歇曝气沉淀具有明显强化反应床体系去除COD和氨氮的能力,出水COD和氨氮分别小于150 mg/L和5 mg/L.随着铁屑内电解反应器的不断完善,前置铁屑固定床和间歇曝气沉淀可作为强化矿化垃圾反应床处理填埋场渗滤液的有效途径,为经济有效地处理填埋场渗滤液提供了一条新思路.%In order to build the optimal process of waste iron scraps coupling with aged-refuse-based reactor, the influences of retention time on the iron-scraps-based treatment of landfill leachate and the effluent from the aged-refuse-based reactor have been contrasted and analyzed, respectively. Subsequently, the treatment effect of the preceding waste-iron-scraps coupling with the aged-refuse-based reactor on the landfill leachate is investigated. The results show that without pH adjustment,the preceding iron-scraps-fixed reactor and the intermittent aeration-sedimentation have apparent capacity for strengthening the removal performance of the aged-refuse-based reactor in terms of COD and ammonium-nitrogen. The COD and ammonium-nitrogen concentrations in the effluent are less than 150 mg/L and 5 mg/L. With the continuous improvement in the iron-scrap-fixed reactor,the preceding iron-scraps-fixed reactor and the intermittent aeration-sedimentation could be considered as a promising way in strengthening the removal performance of the aged-refuse-based reactor,which is of great significance for the economic and effective treatment of landfill leachates.