A-O脱氮型生物反应器填埋技术试验研究

为了解决生物反应器填埋场渗滤液循环的氨氮积累问题，提出了A-O脱氮型生物反应器填埋技术，在渗滤液回灌的基础上，对回灌渗滤液进行曝气处理、pH调节和温度控制。通过建立模拟填埋柱试验，研究了不同填埋工艺对渗滤液中氨氮、COD去除以及填埋垃圾产气特征的影响。结果表明：A-O脱氮型生物反应器填埋系统在氨氮、COD去除以及产气特征上均优于传统填埋系统和渗滤液厌氧回灌填埋系统。A-O脱氮型生物反应器填埋系统中渗滤液氨氮浓度降至200.9mg/L，COD浓度降至1900mg/L，最高产气速率和累积产气量分别达到195L/d和2976L，后期CH₄浓度稳定在60％左右。

Research on the A-O Bioreactor Landfills for Nitrogen Removal

In order to solve the problem of Ammonia-N accumulation in bioreactor landfills, accelerate the biodegradation, and decrease the operational challenges of leachate treatment, the A-O bioreactor landfills for nitrogen removal was advanced. The system leachate recycling landfills with aerobic treatment of leachate, pH adjustment and temperature control. Laboratory simulation experiments were carried out to investigate the effect of different system on the biogas generation as well as the removal of Ammonia-N and COD. The results show that the biogas generation as well as the removal of Ammonia-N and COD in the A-O bioreactor landfills for nitrogen removal was faster than that in the conventional landfills and leachate recycling landfills. At the end of test, the Ammonia-N and COD concentration are 200.9mg/L and 1900mg/L respectively. The top rate and cumulative yield of biogas generation are 195L/d and 2976L respectively, and the CH₄ concentration was about 60%.