垃圾渗滤液短程硝化快速启动研究

Study on the Rapid Start-up of Partial Nitrification Using Actual Landfill Leachate

文章针对目前短程硝化工艺启动慢、难以稳定生成亚硝氮的难题,接种市政污泥与渗滤液生化池污泥,采用垃圾渗滤液分别完成了短程硝化的启动。结果表明,在氨氮质量浓度为100~300 mg/L,溶解氧浓度为1 mg/L的条件下,经过约50 d的连续运行,可实现市政污泥向短程硝化污泥完全转化的过程,完成短程硝化的快速启动;渗滤液生化池污泥则可通过控制溶解氧(1 mg/L)以及水力停留时间(24 h)的条件下,于一周内完成短程硝化的快速启动。此外针对半程短程硝化稳定运行的控制条件进行了研究,得到结论为在考虑经济成本的情况下,同时控制溶解氧和SRT可有效对半程短程硝化进行稳定化运行。

In view of the problem that currently the rapid start-up of partial nitrification(PN)process and stable formation of nitrite are proved to be hard to reach,this study accomplished rapid start-up of PN process using actual landfill leachate,while municipal sludge and leachate plant sludge is applied.The results show that under the condition that ammonia nitrogen being 100~300 mg/L and DO being 1 mg/L,after about 50 days of continuous operation,the process of complete conversion of municipal sludge to partial nitrification sludge can be achieved;When applying leachate plant sludge the PN process can be started within one week with controlling DO(1 mg/L)and HRT(24 h).In addition,the control conditions of partial nitritation are studied,and it is concluded that simultaneously controlling DO and SRT could effectively stabilize the partial nitritaion process while considering economic cost.