摘要
本研究基于磷酸铵镁法进行废水脱氮除磷基本原理、影响因素及结晶效果,从废水中氨氮的去除及降低化学沉淀剂的使用成本考虑,选择预处理低浓氨氮废水优化技术,通过筛选不同镁盐、不同pH值,不同配比及反应时间优化,选择处理化肥厂氨氮废水的最佳处理条件。最优条件为:调节水质pH=9,Mg2+∶NH+4∶PO3-4物质量比为1.0∶1.0∶1.0,反应时间为1h,氨氮去除率可达95%以上,处理后的氨氮废水可通过生化处理达标排放。
According to the basic principle of denitrification and phosphorus removal in wastewater by magnesi- um ammonium phosphate method, influence factors and the effect of crystallization of ammonia nitrogen removal in wastewater. The optimum condition that can remore ammonia nitrogen in wastewater and reduce the chemical pre- elpitatant cost, pretreatment process of low concentration of ammonia nitrogen wastewater was choosed. Through the screening of different magnesium salt, pH, different material ratio and reaction time choosed optimum process conditions were follws： pH=9, n（Mg2＋） ： n（NH4＋） ： n（PO4^3-）=1.0 ： 1.0 ： 1.0, the reaction time of lb. In these conlitions ammonia nitrogen removal rate can reach more than 95%. The index of ammonia nitrogen emissions in waste water that was treated by the MAP can reach standards by biochemical treatment.
出处
《精细与专用化学品》
CAS
2017年第4期8-11,共4页
Fine and Specialty Chemicals
关键词
低浓氨氮废水
磷酸铵镁法
生化处理
low concentration of ammonia nitrogen wastewater
magnesium ammonium phosphate methodsbiochemical treatment
