摘要：

老龄垃圾渗滤液是一种典型的高氨氮、低C/N废水，脱氮处理难度较大。构建了一套SBR-反硝化-厌氧氨氧化工程化系统处理某填埋场老龄垃圾渗滤液，在平均渗滤液处理量84.93 m³/d情况下，系统氨氮去除率、总氮去除率、总氮去除量（以N计）分别为（92.5±4.9）%、（77.1±9.6）%、（107.1±30.7） kg/d。该系统SBR池具有硝化、少量反硝化及有机物去除等作用，并为反硝化单元提供基质；反硝化池起到了脱除部分总氮及COD的作用；厌氧氨氧化单元是最主要渗滤液氨氮、总氮去除功能单元，实现了稳定的部分亚硝化耦合厌氧氨氧化作用，且厌氧氨氧化能去除部分难降解有机物，促进反硝化协同脱氮。相比于硝化反硝化工艺，该系统处理单位质量废液能节约碳源成本17.4元/m³。该研究充分验证了厌氧氨氧化工艺用于老龄垃圾渗滤液工程化处理的可行性、稳定性与经济性，并可为其工程化应用提供技术参考。

关键词: 老龄垃圾渗滤液, 生物脱氮, 厌氧氨氧化, 工程应用

Abstract:

The mature landfill leachate is a typical high ammonia nitrogen and low C/N wastewater, which is difficult to be treated for nitrogen removal. This study proposed a large-scale SBR-denitrification-Anammox treatment system for mature landfill leachate. Under the average treatment volume of 84.93 m³/d, this system achieved ammonium and total nitrogen removal rates of (92.5±4.9)% and (77.1±9.6)%, and nitrogen removal of (107.1±30.7) kg/d, respectively. SBR tank had the roles of nitrification, a small amount of denitrification, and organic matter removal, which provided substrate for the denitrification unit. The denitrification tank played the role of removing part of the total nitrogen and COD. Anammox unit was the most important leachate ammonia nitrogen, total nitrogen removal functional unit, to achieve a stable part of nitrosation coupled Anammox. In addition, the Anammox unit could further remove part of refractory organic matter for the integrated nitrogen removal by denitrification. Compared to nitrification and denitrification process, the treatment system of this study could save carbon source cost as 17.4 yuan/m³. This study revealed the feasibility, stability and economical efficiency of Anammox process for mature landfill leachate treatment, which could be technical guidance for the application of this process in the future.

Key words: mature landfill leachate, biological nitrogen removal, Anammox, engineering application

中图分类号: 

• X703