不同填埋结构渗滤液中的氮动态变化特性

建立了准好氧和厌氧的垃圾填埋模拟试验装置，研究了渗滤液中ρ(NH₄＋-N)，ρ(NO₃－-N)，ρ(NO₂－-N)和ρ(TN)的动态变化特性. 结果表明:装入模拟装置的城市生活垃圾，经过12个月的降解后，准好氧填埋结构渗滤液中的ρ(NH₄＋-N)和ρ(TN)显著下降，分别降至945和986 mg/L，下降率(分别为79.2%和77.3%)远远大于厌氧填埋结构；ρ(NO₃－-N)和ρ(NO₂－-N)变化波动较大，在第25～31周时，NO₃－-N与NO₂－-N都有一个累积的过程；厌氧填埋结构中，ρ(NH₄＋-N)由初始的4 599 mg/L降至2 812 mg/L，ρ(TN)则降至2 859 mg/L，其降解效果远不如准好氧填埋，而ρ(NO₃－-N)和ρ(NO₂－-N)较低，波动不大. 

Characteristics of Nitrogen in Leachate in Municipal Solid Waste Landfill

Semi-aerobic and anaerobic landfilling experiment installations were constructed to study the variation characteristics of pollutants such as NH₄＋-N, NO₃－-N, NO₂－-N and TN in landfilling leachate. The results showed that the concentrations of NH₄＋-N, TN in leachate produced from semi-aerobic landfill treatment declined rapidly after 12 months, and reduced to 945 and 986 mg/L respectively. The reducing rate of NH₄＋-N concentration and TN concentration had reached 79.2% and 77.3% respectively. The variation range of NO₃－-N and NO₂－-N concentration is large and NO₃－-N and NO₂－-N accumulate in 25～31 weeks. However, in the anaerobic landfill treatment, the concentrations of NH＋₄-N and TN reduced to 2　812and 2　859 mg/L, and the concentration of NO₃－-N and NO2－-N in leachate was low and has no obvious change. The results showed that, considering the concentrations of pollutants in leachate, the effect of semi-aerobic landfill treatmentwas better than the anaerobic landfill treatment.