化学沉淀法除去废水中的氨氮及其反应的探讨

NH-3-N Removal in Wastewater by Chemical Precipitation and Exploration of Reaction

研究了化学沉淀法处理含氨氮废水，实验研究了不同操作条件，如溶液ｐＨ值、沉淀剂种类和配比、废水中的初始氨浓度等对氨的处理效率的影响，在适宜的操作条件下，可除去废水中的氨高达９９％，处理后残液中氨浓度小于１ｍｇ／Ｌ（１ｐｐｍ），探讨了化学沉淀反应过程的机理。

NH3 -N removal in wastewater by chemical precipitation was studied. The effect of different operational conditions such as pH values in solutions,formulas of precipitants,and initial molar concentration of NH3 in wastewater on the NH3 removal efficiency was investigated experimentally. Under the optimal conditions,about 99% of NH3 in wastewater can be removed and the concentration of NH3 in water through treatment is less than 1 mg/L(lppm). The reaction mechanism of chemical precipitation process was explored.