填埋方式对污泥填埋稳定性的影响

Influence of Landfill Modes on Stabilization of Sludge Landfill

参考垃圾填埋场经验,采用模拟填埋场,对污泥分别进行准好氧填埋和厌氧填埋,并定期监测渗滤液水质,利用指数法对两种填埋场的稳定化进行评价。结果表明,与厌氧填埋相比,准好氧填埋方式下污泥容重、密度和孔隙度的增长速度更快;并且准好氧填埋方式更有利于填埋体中污染物的降解,渗滤液中的污染物浓度更低;准好氧填埋场的稳定化速率要大于厌氧填埋场:准好氧填埋场在封场10周后即可达到二级稳定、渗滤液水质达到二级排放标准,而厌氧填埋场在封场30周后才能达到此标准。

Based on the experience in garbage landfill, semi-aerobic landfill and anaerobic landfill of sludge were performed in two simulated landfill sites, and the leachate quality was monitored at regular intervals. The stabilization of landfill sites having two landfill modes was evaluated utilizing exponential technique. The bulk density, density and porosity of sludge in semi-aerobic landfill are increased more rapidly than those in anaerobic landfill. The semi-aerobic landfill is more favorable than the anaerobic landfill in reducing the pollutants, and the pollutant concentration in leachate is lower. The stabilization velocity of semi-aerobic landfill is greater than that of anaerobic landfill. After 10 weeks of closing, the semi-aerobic landfill site reaches the stabilization degree of two grade, and the leachate quality reaches secondary discharge standards, while after 30 weeks of closing, the anaerobic landfill site reaches the same stabilization degree.