摘要：

试验采用新老垃圾渗滤液混合方法处理垃圾渗滤液,探讨了利用老垃圾填埋体的厌氧条件实现反硝化的可行性。试验中,好氧反应进水COD_Cr和NH₃-N质量浓度分别为4987mg/L和494mg/L时,其出水分别为358mg/L和136mg/L,去除率分别为92.8%和72.5%。这表明,采用新老垃圾渗滤液混合的方法去除渗滤液中的COD_Cr和NH₃-N是可行的。当垃圾填埋体的NO_x^--N体积负荷为1.2g/(m3·d)时,厌氧填埋体的反硝化率可达到99%以上,总氮去除率最高可以达到46.4%。

关键词: 渗滤液, 反硝化, 脱氮

Abstract:

The combined method of newand old trash leachate treatment has been used. The anaerobic conditions of the old trash landfill have been made use of for realizing the feasibility of denitrification.The tests show that when the concentratiorn of COD_Cr and NH₃-N of aerobic reactor influent are 4 987 mg/L and 494 mg/L respectively,the effluent concentrations are 358 mg/L and 136 mg/L respectively and the removal rates are 92.8% and 72.5% respectively. The results also showthat this method is feasible. When NO_x^--N volume load of the trash landfill is 1.2 g/(m3·d),the denitrification rate of anaerobic trash landfill can be higher than 99%. The highest removal rate of total nitrogen can reach 46.4%.

Key words: leachate, denitrificetion, denitrogenation

中图分类号: 

• X703.1