限氧自养硝化-反硝化生物脱氮新技术

限氧自养硝化—反硝化是部分硝化与厌氧氨氧化相耦联的生物脱氮反应过程，通过严格控制溶解氧在0．1～0．3mg·L^-1，实现硝化反应控制在亚硝酸阶段，然后以硝化阶段剩余的NH4^+作为电子供体，在厌氧条件下实现反硝化，该反应过程是完全的自养硝化—反硝化过程，具有能耗低、脱氮效率高、反应系统占地面积小等优点，适用于处理COD／NH4^+—N低的废水，是一种非常有应用前景的生物脱氮技术，文中详细介绍了限氧自养硝化—反硝化生物脱氮反应过程的研究进展，讨论了其微生物学机理及应用前景。

Oxygen-limited autotrophic nitrification and denitrification- A novel technology for biological nitrogen removal

Oxygen-limited autotrophic nitrification and denitrification (OLAND) is a biological nitrogen removal process coupled with partial nitrification and anaerobic ammonium oxidation. In our study, the nitrification was blocked at nitrite stage by controlling the dissolved oxygen concentration at 0.1-0.3 mg.L-1, and then, the denitrification proceeded, with the residual ammonium at the partial nitrification stage as electron donor. As a completely autotrophic nitrification-denitrification process, the OLAND was of many advantages (e.g., low energy consumption, high nitrogen removal rate and small footprint of system), and suitable in particular for treating low COD/NH4(+)-N ratio wastewater. It has become one of the most prosperous and practicable biological nitrogen removal technologies. The recent research of OLAND was reviewed, and its microbial mechanism as well as its applicable prospect was remarked in this paper.