摘要
先采用氧化镁和磷酸在碱性条件下与渗滤液中的NH3-N发生化学反应,生成六水磷酸铵镁(MgNH4PO4.6H2O)沉淀物,对渗滤液进行预处理。实验表明:在pH为9.5、药物投加比NH4+∶Mg2+∶PO43-为1∶1.3∶1的条件下,渗滤液中NH3-N的去除率达到76.7%,COD去除率为40.7%。最后对预处理出水用Fenton试剂进行氧化处理,实验结果表明:在pH为3、氧化时间为210 min、药剂投加量FeSO4.7H2O为0.04 mol、H2O2/FeSO4.7H2O投加比例为4∶1时,COD的去除率达93.81%。
The chemical reaction is carried on as magnesia and phosphorylation meets NH3 - N in the leachate under alkaline conditions, in which the sediment of MgNH4PO4·6H2O is produced and the leachate is pre - treated. The result shows that the removal rate of NH3 - N and COD can reach 76.7 % and 40.7 % respectively under conditions, pH = 9.5 and drug addition ratio NH4^＋ ： Mg^2＋ ： PO4^3- = 1 ： 1.3：1. Pretreatment effluent is oxidized by Fenton reagent and the result shows that the removal rate of COD can reach as high as 93.81% with conditions, pH = 3, 210 mins of oxidation time , the dosage of FeSO4·7H2O 0.04 mol, and the addition ratio of H2O2/FeSO4·7H2O4：1.
出处
《工业安全与环保》
2008年第5期43-45,共3页
Industrial Safety and Environmental Protection
