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近年来将厌氧工况引进了活性污泥法中,丰富了污水生化处理的技术内涵。厌氧好氧工况的并存可达到脱氮,除磷的目的。但脱氮、除磷所利用的厌氧条件在生化反应上有着质的区别。在工程实践上也有着不同的技术经济效果。在混合液中无溶解氧的条件下,脱氮菌利用硝酸态氧进行呼吸,将硝酸盐还原为氮气的生化反应称之为生物脱氮。氨氮的完全硝化是脱氮反应的前提。
In recent years, anaerobic conditions have been introduced into the activated sludge process to enrich the technical connotation of sewage biochemical treatment. The coexistence of anaerobic aerobic conditions can achieve the purpose of denitrification and phosphorus removal. However, the anaerobic conditions used in denitrification and phosphorus removal have qualitative differences in biochemical reactions. In engineering practice also has different technical and economic effects. Under the condition of no dissolved oxygen in the mixture, the denitrifying bacteria use nitric oxygen for respiration and the biochemical reaction for reducing nitrate to nitrogen is called biological nitrogen removal. Complete nitrification of ammonia nitrogen is the premise of denitrification.