【摘要】 针对垃圾渗滤液脱氮困难的问题,利用序批式反应器,通过逐步提高进水渗滤液含量、短程硝化-厌氧氨氧化相结合的工艺模拟了实际渗滤液的处理,探究了氮循环功能基因的变化,分析和推测了不同脱氮途径的功能强度。结果表明:该系统的总氮去除率达到90%以上,去除负荷为0.51 kg/(m3·d),去除效果稳定,实现了对氮的深度处理。另外,通过对体系中氮循环功能基因的测定,发现随着渗滤液的投加,厌氧氨氧化脱氮反应的优势地位有所下降,反硝化过程协同脱氮能力增加,结合实际运行数据表明反硝化菌群的富集,在一定程度上提高了厌氧氨氧化系统的性能。更多还原

【Abstract】 In view of the difficulty in removing nitrogen from municipal solid waste leachate,a sequential batch reactor was used,and the method of gradually increasing the content of leachate was adopted. And a combined process consisting of partial nitrification(PN)and anaerobic ammonium oxidation(anammox)was used to simulate the treatment of actual leachate.Meanwhile,the changes of nitrogen cycling functional genes were also investigated and the functional intensity of different nitrogen removal pathways were analyzed. The results showed that the total nitrogen removal rate of the system was more than90%,the removal load was 0.51 kg/(m3·d),the removal effect was stable,and the deep treatment of nitrogen was realized. In addition,through the determination of nitrogen cycle functional genes in the system,it was found that with the addition of leachate,the dominant position of anaerobic anammox denitrification reaction decreased,and the synergistic denitrification capacity of denitrification process increased. Combined with the actual operation data,it was shown that the enrichment of denitrifying bacteria improved the performance of anammox system to a certain extent.更多还原