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对炼油废水中氨氮的生物降解用两种工艺（Ｏ／Ｏ工艺和Ａ／Ｏ工艺）进行了中间试验。试验结果表明，正常工艺条件下，Ｏ／Ｏ工艺处理后出水中ＮＨ３ －Ｎ＜ ２５ｍ ｇ／Ｌ，ＣＯＤ＜ ４０ｍ ｇ／Ｌ，油＜ ５ｍ ｇ／Ｌ；Ａ／Ｏ工艺处理后出水中ＮＨ３－Ｎ＜ ２０ｍ ｇ／Ｌ，ＣＯＤ＜ ５０ｍ ｇ／Ｌ，油＜ ５ｍ ｇ／Ｌ，ＮＯ－３ －Ｎ＜ １０ｍ ｇ／Ｌ。
The biodegradation of ammonia nitrogen in the refinery wastewater was conducted in two experiments (O / O and A / O). The results showed that under normal process conditions, NH3-N <25m g / L, COD <40m g / L and oil <5m g / L in treated effluent after O / N <20 m g / L, COD <50 m g / L, oil <5 m g / L, NO-3 -N <10 m g / L.