【摘要】 介绍了酸铵镁(magnesiumammoniumphosphate,MAP)法处理高浓度氨氮废水的技术,研究了药剂配比、反应pH值以及药剂选择等因素对氨氮去除率的影响。试验结果表明,当在剩余氨水中投加MgCl2·6H2O和Na2HPO4·12H2O药剂,Mg2+∶NH+4∶PO3-4的摩尔比为1.4∶1∶0.9,反应pH值为8.5~9.5的条件下,原水的氨氮浓度可由2000mg/L降到15mg/L。并通过对反应沉淀物的结构成分分析,探讨了MAP作为有效缓释肥开发利用的可行性。更多还原

【Abstract】 The paper introduces a technology to treat wastewater containing high straight ammonia nitrogen by using MAP (magnesium ammonium phosphate)method. The ammonia nitrogen removal efficiency under different rations of materials, pH and operation conditions were studied. The experimental results demonstrated that with the optimal pH for the precipitation about 8.5~9.5 and by applying such chemicals as MgCl 2·6H 2O and Na 2HPO 4·12H 2O and with the ration of Mg 2+ ∶NH + 4∶PO 3- 4 was controlled at 1.4∶1.0∶0.9, the NH 3 N was reduced from initial 2000 mg/L to 15 mg/L.And the paper also discusseds the feasibility of MAP used as a compound fertilizer.更多还原