摘要
采用鸟粪石法对氧化铁红厂高氨氮废水进行处理,以p H、n(N)∶n(Mg)和n(N)∶n(P)为主要影响因素,通过响应面法对处理过程进行了优化设计,得到拟合程度高的二次响应曲面模型。预测的最佳实验条件:p H=9.40,n(N)∶n(Mg)∶n(P)=0.8∶1∶1,此条件下氨氮去除率为99.77%。通过对镁盐和磷酸盐投加量的分析得到,当n(N)∶n(Mg)∶n(P)=0.9∶1.25∶1时,出水氨氮能够达到排放标准的要求,且出水正磷酸盐浓度较低。SEM和XRD表征结果显示,所得沉淀物大部分为磷酸铵镁。
MAP method has been used for treating the high ammonia-nitrogen wastewater from an iron oxide red factory. The three main influencing factors are as follows：p H,n（N）∶n（Mg） 和 n（N）∶n（P）. The treatment course is optimized by response surface method（RSM）,so as to obtain the quadratic response curved model with high fitting degree. Under the forecast optimum experiment conditions：p H =9.40,n（N） ∶n（Mg） ∶n（P） = 0.8 ∶1 ∶1, the removing rate of ammonia-nitrogen could be 99.77%. By analyzing the dosages of Mg2＋and PO43-,it is found that when n（N）∶n（Mg）∶n（P）=0.9∶1.25∶1,the effluent concentration of ammonia-nitrogen could meet the requirements for the emission standard,and the concentration of orthophosphate could stay at a low level. The results of SEM and XRD characterization show that the sediments obtained are mostly magnesium ammonium phosphate.
出处
《工业水处理》
CAS
CSCD
北大核心
2015年第6期61-64,共4页
Industrial Water Treatment
关键词
响应面法
氧化铁红
高氨氮废水
磷酸铵镁
response surface method
iron oxide red
high ammonia-nitrogen wastewater
magnesium ammonium phosphate
