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pH effect on the treatment of ammonia-nitrogen from coke plant wastewater by MAP process
Author(s): LIU Dapeng, WANG Jihui, LIU Xiaolan, HUANG Wenshui, ZOU Liang, HE Danli, JIANG Qian
Pages: 44-
47
Year: 2004
Issue:
1
Journal: INDUSTRIAL WATER TREATMENT
Keyword: 磷酸铵镁; 焦化废水; 氨氮; pH值;
Abstract: 采用化学药剂Na2HPO4·12H2O和MgCl2·6H2O与焦化废水中的高浓度氨氮反应生成磷酸铵镁(MAP),着重探讨了pH值对氨氮去除效果的影响.实验结果表明,在Mg2+,HN+4,PO3-4物质的量比为13:1:0.9,得到最佳pH为8.5~10,原废水中的NH3-N可由2 380 mg/L降到100mg/L以下,生成的MAP晶体纯度较高,对废水中的有毒、有害物质无吸附,并具有良好的沉降性能.
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