• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议> >Laboratory Studies of Ammonia Nitrogen Removal in Wastewater from Ammonia Industry by Struvite Precipitation
【24h】

Laboratory Studies of Ammonia Nitrogen Removal in Wastewater from Ammonia Industry by Struvite Precipitation

机译：鸟粪石沉淀去除氨工业废水中氨氮的室内研究

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A laboratory scale study was conducted to precipitate the high concentration of ammonia-nitrogen (NH4-N) in wastewater to form magnesium ammonium phosphate(struvite) by applying such chemicals as Na2HPO4¡¤12H2O andMgCl2¡¤6H2O. Synthetic ammonia-nitrogen wastewater was prepared with NH4Cl solution. The reaction conditions such as pH, the molar ratios of Mg/P and P/N, and the molar ratiosNH4-N:PO4-P:Mg (that is N:P:Mg) have been studied. The removal efficiencies of NH4-N, PO4-P and Mg were studied simultaneously. The results showed that the optimum pH value was about 9. The optimal molar ratios of Mg/P and P/N were about 1.0-1.1. When the molar ratio of N:P:Mg was 1:1:1.1, the removal efficiencies of NH4-N, PO4-P and Mg was 87.5, 99.7and 93.8%, respectively, the concentration of NH4-N, PO4-Pand Mg in effluent was 125, 5.7 and 116 mg/L, respectively. Precipitation was analyzed with scanning electron microscope and X-ray diffraction (XRD) analysis and the result indicated struvite precipitation was formed. The primary treatment wastewater was discharged into municipal wastewater treatment plant for further treatment.
机译：通过使用Na2HPO4·12H2O和MgCl2·6H2O等化学物质进行实验室规模的研究，以沉淀废水中的高浓度氨氮（NH4-N）以形成磷酸镁镁（鸟粪石）。用NH4Cl溶液制备氨氮废水。已经研究了反应条件，例如pH，Mg / P和P / N的摩尔比以及NH4-N：PO4-P：Mg（即N：P：Mg）的摩尔比。同时研究了NH4-N，PO4-P和Mg的去除效率。结果表明，最佳pH值为约9。Mg/P和P / N的最佳摩尔比为约1.0-1.1。当N：P：Mg的摩尔比为1：1：1.1时，NH4-N，PO4-Pand的去除率分别为87.5、99.7和93.8％。废水中的Mg分别为125、5.7和116 mg / L。用扫描电子显微镜和X射线衍射（XRD）分析对沉淀进行分析，结果表明形成鸟粪石沉淀。初级处理废水排放到市政废水处理厂中进行进一步处理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号