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鸟粪石法回收制肥工业废水中氨氮的中试研究

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平倩, 陈静霞, 李咏梅. 鸟粪石法回收制肥工业废水中氨氮的中试研究[J]. 环境工程学报, 2014, 8(9): 3585-3590.
引用本文: 平倩, 陈静霞, 李咏梅. 鸟粪石法回收制肥工业废水中氨氮的中试研究[J]. 环境工程学报, 2014, 8(9): 3585-3590.
shu
Ping Qian, Chen Jingxia, Li Yongmei. A pilot-scale study on ammonia-nitrogen recovery from fertilizer industry wastewater using struvite precipitation[J]. Chinese Journal of Environmental Engineering, 2014, 8(9): 3585-3590.
Citation: Ping Qian, Chen Jingxia, Li Yongmei. A pilot-scale study on ammonia-nitrogen recovery from fertilizer industry wastewater using struvite precipitation[J]. Chinese Journal of Environmental Engineering, 2014, 8(9): 3585-3590.
shu

鸟粪石法回收制肥工业废水中氨氮的中试研究

  • 1.

    同济大学环境科学与工程学院, 污染控制与资源化研究国家重点实验室, 上海 200092

  • 基金项目:

    国家高技术研究发展计划（863）项目（2011AA060902）

  • 中图分类号: X703

A pilot-scale study on ammonia-nitrogen recovery from fertilizer industry wastewater using struvite precipitation

  • 1.

    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

  • Fund Project:

  • 摘要: 制肥工业废水中氨氮浓度高，难以直接进行生化反应，采用鸟粪石沉淀法可有效去除并回收氨氮。利用中试反应器回收某制肥工业废水中的氨氮，采用氯化镁与氧化镁作为联用镁源，通过考察不同进料方式、搅拌速度、停留时间等因素的影响，确定了鸟粪石法回收氨氮的最佳工况：采用间歇进水、固体投加镁源的投料方式，搅拌速度300 r/min，停留时间2 h。最佳条件下，氨氮去除率达到93.5%，磷残余率小于0.3%，生成的鸟粪石纯度可达85.6%，砷和铅的质量分数分别为0.0036和0.0008，符合肥料中重金属限值（GB/T 23349-2009），其他重金属均未检出。因此，回收产品有很好的利用价值。经济分析表明磷源是此方法处理成本较高的主要原因。
    Abstract: High-strength ammonia-nitrogen usually exists in wastewater of fertilizer industry, which is difficult to be treated directly using biological technology. Struvite precipitation can efficiently remove and recover ammonia-nitrogen. In this study, a pilot-scale reactor was used to recover ammonia from fertilizer industry wastewater. MgCl2 and MgO were used as magnesium agents. Effects of feeding mode, stirring speed and reaction time were investigated. The optimal conditions for ammonia-nitrogen recovery using struvite precipitation technology were as follows: intermittent feeding mode with addition of solid magnesium agents, stirring speed of 300 r/min, reaction time of 2 h. Under the above optimal conditions, the removal efficiency of ammonia-nitrogen was 93.5% and the residual phosphorus was less than 0.3%. The purity of the harvested struvite reached 85.6%. Mass fractions of arsenic and lead were 0.0036 and 0.0008, respectively, which were below the limits of heavy metal contents regulated by the fertilizer standards in China (GB/T 23349-2009), and other heavy metals were not detected. Therefore, the harvested struvite has good application value. Economic analysis showed phosphorus source is the main reason for high cost of this technology.
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  • 收稿日期:  2013-12-22
  • 刊出日期:  2014-09-04
平倩, 陈静霞, 李咏梅. 鸟粪石法回收制肥工业废水中氨氮的中试研究[J]. 环境工程学报, 2014, 8(9): 3585-3590.
引用本文: 平倩, 陈静霞, 李咏梅. 鸟粪石法回收制肥工业废水中氨氮的中试研究[J]. 环境工程学报, 2014, 8(9): 3585-3590.
shu
Ping Qian, Chen Jingxia, Li Yongmei. A pilot-scale study on ammonia-nitrogen recovery from fertilizer industry wastewater using struvite precipitation[J]. Chinese Journal of Environmental Engineering, 2014, 8(9): 3585-3590.
Citation: Ping Qian, Chen Jingxia, Li Yongmei. A pilot-scale study on ammonia-nitrogen recovery from fertilizer industry wastewater using struvite precipitation[J]. Chinese Journal of Environmental Engineering, 2014, 8(9): 3585-3590.
shu

鸟粪石法回收制肥工业废水中氨氮的中试研究

  • 1. 同济大学环境科学与工程学院, 污染控制与资源化研究国家重点实验室, 上海 200092
  • 收稿日期:  2013-12-22
基金项目:

国家高技术研究发展计划（863）项目（2011AA060902）

摘要: 制肥工业废水中氨氮浓度高，难以直接进行生化反应，采用鸟粪石沉淀法可有效去除并回收氨氮。利用中试反应器回收某制肥工业废水中的氨氮，采用氯化镁与氧化镁作为联用镁源，通过考察不同进料方式、搅拌速度、停留时间等因素的影响，确定了鸟粪石法回收氨氮的最佳工况：采用间歇进水、固体投加镁源的投料方式，搅拌速度300 r/min，停留时间2 h。最佳条件下，氨氮去除率达到93.5%，磷残余率小于0.3%，生成的鸟粪石纯度可达85.6%，砷和铅的质量分数分别为0.0036和0.0008，符合肥料中重金属限值（GB/T 23349-2009），其他重金属均未检出。因此，回收产品有很好的利用价值。经济分析表明磷源是此方法处理成本较高的主要原因。

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