摘要
采用磷酸铵镁沉淀法对制药工艺中高浓度氨氮废水和模拟废水进行多因素试验,结果表明,p H值为9.0~10.0,Mg∶N∶P（摩尔比）=1.2∶1∶1时处理效果最佳;无论选用何种磷酸盐,在最佳反应条件下氨氮去除率均在90%以上;使用磷酸氢二钠、磷酸二氢钠时,均需加碱调节,使用磷酸钠则无需加碱;在实验条件下,处理1 mg N,约需14.5 mg Mg Cl2·6H2O和27.2 mg Na3PO4·12H2O,生成Mg NH4PO4·6H2O沉淀17.5 mg;该法为高浓度氨氮废水后续生化处理奠定基础。
The magnesium ammonium phosphate（MAP）precipitation process was used to treat high ammonia nitrogen pharmaceutical wastewater and simulated wastewater. The results show that under the optimum treatment condition of p H 9.0 ~10.0,Mg ∶N ∶P molar ratio 1.2 ∶1 ∶1,the ammonia-nitrogen removal rate was above 90%. The use of Na H2PO4 or Na2HPO4needed to add alkali regulation,and alkali does not need to add when Na3PO4 is used. Under the experimental conditions,1mg N needs 14.5 mg Mg Cl2·6H2O and 27.2mg Na3PO4·12H2O for treatment,and bring MAP precipitation 17.5 mg. This method lays the foundation for the subsequent biochemical treatment of high concentration ammonia nitrogen wastewater.
出处
《山西水利科技》
2016年第1期96-98,共3页
Shanxi Hydrotechnics
关键词
磷酸铵镁
制药废水
高氨废水
影响因素
magnesium ammonium phosphate
pharmaceutical wastewater
high ammonia-nitrogen wastewater
influencing factors
