煤气吹脱解吸法处理含氨废水中氨氮的研究

Study on Removal of NH_3-N in Ammonia Contained Wastewater with Gas Stripping and Adsorption Process

主要采用“煤气吹脱解吸法”对焦化厂含氨废水中氨氮进行吹脱解吸的优选实验研究。实验的最佳反应条件为：T-80℃，pH=10．2，Q=5L／min（气液比为1500：1），t=120min，C=0-25mg／L。处理后废氨水中氨氮脱除率达到96％以上，取得了满意的效果，同时氰、酚和COD也都不同程度地被脱除。经生化处理后，氨氮含量可达到国家排放标准。

This text adopted ＂gas stripping and adsorption process＂ to do experiments on removing the ammonia nitro- gen from waste ammonia water in the coking plant. The best condition of the experiment is： T=80℃ ,pH= 10. 2, Q=SL/ min （air--liquid ratio is 1500：1）, t=120min , C=0-25 L/min. The removing rate of the ammonia nitrogen in the treated ammonia water is over 96%, which obtains a satisfied result, simultaneously the cyanide, the phenol and the COD are removed in some degree. After bio--treatment,the target of NH3-N can meet the national discharge standard.