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氧化镁与白云石石灰对不同来源废水中磷的回收效果

魏金山 刘雪瑜 宋永会 郭继香 王培良 MENG Xiaoguang

魏金山, 刘雪瑜, 宋永会, 郭继香, 王培良, MENG Xiaoguang. 氧化镁与白云石石灰对不同来源废水中磷的回收效果[J]. 环境科学研究, 2015, 28(11): 1734-1740.
引用本文: 魏金山, 刘雪瑜, 宋永会, 郭继香, 王培良, MENG Xiaoguang. 氧化镁与白云石石灰对不同来源废水中磷的回收效果[J]. 环境科学研究, 2015, 28(11): 1734-1740.
WEI Jinshan, LIU Xueyu, SONG Yonghui, GUO Jixiang, WANG Peiliang, MENG Xiaoguang. Phosphorus Recovery from Wastewaters of Different Sources with Magnesium and Dolomite Lime[J]. Research of Environmental Sciences, 2015, 28(11): 1734-1740.
Citation: WEI Jinshan, LIU Xueyu, SONG Yonghui, GUO Jixiang, WANG Peiliang, MENG Xiaoguang. Phosphorus Recovery from Wastewaters of Different Sources with Magnesium and Dolomite Lime[J]. Research of Environmental Sciences, 2015, 28(11): 1734-1740.

氧化镁与白云石石灰对不同来源废水中磷的回收效果

基金项目: 国家自然科学基金项目(51078339)

Phosphorus Recovery from Wastewaters of Different Sources with Magnesium and Dolomite Lime

  • 摘要: 选择有代表性的3种来源废水(养猪场废水厌氧消化液、鸡粪废水厌氧消化液和污泥厌氧消化液),利用MgO与白云石石灰作为药剂进行磷回收试验,研究不同药剂、药剂投加量和反应时间下3种来源废水中磷的回收效果,通过动力学方程模拟2种药剂的除磷速率,并采用XRD(X射线衍射)、SEM(扫描电镜)对沉淀产物进行表征. 结果表明:投加2种药剂均可实现磷的有效去除与回收,反应沉淀物中含有MAP(磷酸铵镁)和CaCO3,MgO的最佳投加量为200 mg/L,当反应时间为4 h时,PO43--P去除率达85.0%以上;白云石石灰的最佳投加量为500 mg/L,当反应时间为24 h时,PO43--P去除率达80.0%以上. 投加白云石石灰的反应速率较慢,并且反应沉淀物中含有更多的CaCO3. 以处理1 m3原水为例,MgO药剂成本为0.80元,白云石石灰药剂成本为0.25元,显示白云石石灰经济成本更低,是较为理想的磷回收药剂.

     

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出版历程
  • 收稿日期:  2015-02-10
  • 修回日期:  2015-08-20
  • 刊出日期:  2015-11-25

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