不同填埋结构渗滤液中的氮动态变化特性  

Characteristics of Nitrogen in Leachate in Municipal Solid Waste Landfill

作　　者：王晓龙[1] 呼世斌[2] 黄启飞[1] 

机构地区：[1]中国环境科学研究院,北京100012 [2]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《环境科学研究》2008年第4期157-162,共6页Research of Environmental Sciences

基　　金：国家自然科学基金项目(50508042)

摘　　要：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.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 NH4^＋ -N and TN reduced to 2 812 and 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 treatment was better than the anaerobic landfill treatment.

关 键 词：生活垃圾 填埋 准好氧 渗滤液 氮 

分 类 号：X701[环境科学与工程—环境工程]