随着石油化工产品的增加及深度加工，其排放污水中ＮＨ３－Ｎ经中和沉淀，生化处理后仍达不到国家排放标准。为促使石油化工外排污水ＮＨ３－Ｎ达标，提出了Ａ／Ｏ生物膜脱氮、过氯化脱氮、碱化曝气吹脱脱氮及程序间歇式多级生物氧化法脱氮（简称生物氧化法）等技术，经过小试、中试及局部生产性试验，取得了明显的脱氮效果，在源头来水水质较稳定的情况下，可确保外排污水中ＮＨ３－Ｂ达标。 With the increase of petrochemical products and in-depth processing, the NH3-N in the discharged sewage is still not up to the national emission standard after being biodegraded and biodegraded. In order to promote the effluent NH3-N in petrochemical industry to reach the standard, A / O biofilm denitrification, perchloride denitrification, alkalizing aeration and denitrification were put forward and the program batch-type multi-stage biological oxidation denitrification Oxidation) and other technologies, after a small pilot, pilot and local production tests, and achieved significant denitrification results, the source of water quality is more stable under the circumstances, to ensure that the effluent NH3-B compliance.