摘要
研究了填埋垃圾上层间歇曝气充氧或渗滤液回流前经好氧、硝化反应器处理的生物反应器填埋场系统中渗滤液的脱氮效果及其填埋垃圾的稳定化过程．结果表明，填埋垃圾上层间歇曝气充氧的生物反应器填埋场系统渗滤液NH4^＋-N浓度的衰减速度虽然比渗滤液回流前经好氧、硝化反应器处理的生物反应器填埋场系统慢，但其理论能耗可比后者节省98％左右，并且无需好氧、硝化反应器的基建投资和污泥处理．此外，填埋垃圾上层间歇曝气充氧的方式加快了填埋垃圾和渗滤液中有机物的降解，提高了填埋垃圾的稳定化效果，增加了10％～12％的沉降高度．而渗滤液经过好氧反应器处理后回流到填埋场，将会引起填埋垃圾降解后期碳源供应不足，减慢垃圾的稳定化过程．填埋垃圾上层间歇曝气充氧的生物反应器填埋场系统由于其中的反硝化作用有机物的消耗及好氧微生物的代谢活动，其渗滤液CODCr和VFA最大浓度仅为对照的50％，并且产甲烷反应器的产气量也减少了42％～44％．
Nitrogen removal and refuse stabilization were investigated in the bioreactor landfills with intermittent aeration at the top of landfilled refuse or an aerobic nitrifying reactor using treated leachate recirculation. The results showed that the decrease in leachate NH4^＋-N concentration in the bioreactor landfill system with intermittent aeration at the top of landfilled refuse was slower than that with an aerobic nitrifying reactor using treated leachate recirculation, but the theoretical energy consumption of the former was about 98% lower than the latter. The infrastructure investment of aerobic nitrifying reactor and disposal of sludge were no longer indispensable. The way of intermittent aeration at the top of landfilled refuse accelerated the degradation of waste and organic matter in leachate, increased the degree of waste stabilization and enhanced the subsidence by 10 %-12%. However, an aerobic reactor using treated leachate recirculation would bring about a shortage of carbon source at later stage of refuse decomposition, which resulted in slower waste stabilization. Because of the organic matter consumption of denitrifiaction process and the metabolic activity of aerobes, leachate maximal CODer and VFA concentrations in the bioreactor landfill system with intermittent aeration at the top of landfilled refuse ammounted to only 50% of the control, and the gas production from the methanogenic reactor reduced by 42%-44%.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2006年第1期21-26,共6页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
国家自然科学基金资助项目(50478083)
污染环境修复与生态健康教育部重点实验室开放研究基金资助项目(050001)
浙江省科技计划重点科研项目
关键词
城市生活垃圾
生物反应器填埋场
生物脱氮
稳定化
municipal refuse
bioreactor landfill
biological nitrogen removal
stabilization
