高浓度氨氮废水化学沉淀装置的最佳运行条件

Optimal Operation Conditions of Chemical Precipitation Reactor for the Treatment of High-strength Ammonia Waste Water

设计了MAP反应器，并以MgCl2·6H2O和Na2HPO4·12H2O为沉淀剂，对MAP反应器的运行效果进行了研究，确定了MAP反应器最佳运行条件．对不同种类的实际废水进行了初步分析．结果表明，MAP反应器的最佳运行条件为pH=9．5，T=2．5h，搅拌强度200r／min，摩尔配比WMs2＋：wNH4＋：wPO43-为1，2：1：1，在此条件下，模拟废水（500—3000）mg／L和实际废水的去除效果都在90％以上．

The integrated MAP reactor was designed and the ammonia-nitrogen operation effect of MAP reactor was studied using MgCl2·6H2O and Na2HPO4·12H2O as precipitants. The optimization operation condition of MAP reactor was determined and pilot studied different kinds of actual waste water treatment by MAP reactor. The results was shown that the optimization operation condition of the MAP reactor was that pH was 9.5, HRT was 2. 5 h, rotate speed was 200 r/min, the mole ratio of wMg2＋ ： WNH4＋： WpO4 3- was 1.2 ： 1.0 ： 1.0. Under this condition, the removal rate of simulated high-strength ammonia wastewater （ 500 ～ 3 000） mg/L and actual wastewater was all above 90%.