煤气洗涤废水中氨氮处理试验研究

Research on the Treatment of Gas Washing Wastewater with High Concentration Ammonia Nitrogen

研究了MAP法和电化学法对煤气洗涤废水中氨氮脱除效果，实验结果表明：对于MAP法，在pH=9．5～10，n（NH4＋）：n（PO4^3-）：n（Mg2＋）=1：1．5：1．5条件下；对于电化学法，选择投氯比为1：5，总输入电流强度在1．7～2．0A时，两种工艺均可将其氨氮含量脱除至15mg／L以下，达到国家污水综合排放标准（GB8978—1996）一级。

This paper studied the ammonia nitrogen removing effect from the coal gas washing wastewater by using MAP law and the electrification research method. The experimental results indicated： regarding the MAP, under thepH=9.5～10,n（NH4＋）：n（PO4^3-）：n（Mg2＋）=1：1.5：1.5;regarding the electrification research method, the choice throws the chlorine compared to is 1 ： 5 ; total input current intensity when 1.7 - 2.0 A, two crafts may its ammonia nitrogen content removing to 15 mg/L below, which achieves the national sewage synthesis emission standard（ GB8978 - 1996） first - level.