污水低氧脱氮机制及其应用研究进展

阐述了污水低氧脱氮的基本原理,即抑制或去除亚硝酸盐氧化菌(NOB),同时保留氨氧化菌(AOB),并保持其活性;探讨了污水低氧脱氮实现途径;详细介绍了几种典型的污水低氧脱氮工艺(短程硝化(SHARON)工艺、厌氧氨氧化(ANAMMOX)工艺、好氧反氨化(DEMON)工艺、低氧自养硝化反硝化(OLAND)工艺、甲烷营养型硝化反硝化工艺和亚硝酸盐型完全自养脱氮(CANNON)工艺)的应用研究进展;最后对污水低氧脱氮处理工艺的工程运用进行了展望.

Principles and applications of nitrogen removal under oxygen limited conditions

The wastewater in southern China presented the character of low carbon/nitrogen ratio, which was bad for nitrogen removal by conventional nitrification-denitrification processes in efficient and economical. The novel processes of nitrogen removal under oxygen limited conditions could not only reduce the energy consumption for oxy-gen supply, but also avoid the addition of external carbon sources. Combined with the literature review at home and a-board, the paper described the basic principle and realizations of nitrogen removal in oxygen limited conditions, some typical processes such as single reactor high activity ammonia removal over nitrite (SHARON), anaerobic ammonium oxidation (ANAMMOX), deammonification (DEMON), oxygen limited autotrophic nitrification denitrification (OLAND)and completely autotrophic nitrogen-removal over nitrite, (CANNON) were introduced in detail. Finally, the future directions of nitrogen removal in oxygen limited conditions were prospected for the actual application in wastewater treatment plants.