MAP法处理焦化废水中氨氮的pH值影响
收稿日期: 2003-04-29
网络出版日期: 2010-10-01
pH effect on the treatment of ammonia-nitrogen from coke plant wastewater by MAP process
Received date: 2003-04-29
Online published: 2010-10-01
刘大鹏, 王继徽, 刘晓澜, 黄稳水, 邹亮, 何丹莉, 蒋谦 . MAP法处理焦化废水中氨氮的pH值影响[J]. 工业水处理, 2004 , 24(1) : 44 -47 . DOI: 10.11894/1005-829x.2004.24(1).44
Na2 HPO4·12H2O and MgCl 2·6H 2O react with highly concentrated ammonia-nitrogen from coke plant wastewater,forming magnesium ammonium phosphate(MAP).The effect of pH value on the ammonia-nitrogen removal result isexpolored emphatically.The experimental resultsshow that when the ratio of n(Mg2+)∶ n(NH4+)∶ n(PO43-)iscontrolled at1.3 ∶ 1 ∶ 0.9,the optimal pH isabout8.5to10.The NH 3-N in the original wastewater can be decreased from2380mg /L to lower than100mg /L.The formed MAP crystal hashigh purity.It doesnot adsorb the poisonousand harmful substancesin the wastewater.Furthermore,itssedimentation capability isgood.
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