• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Phosphate recovery from wastewaters comparing two different sources of magnesium oxide in the precipitation of struvite.
【24h】

Phosphate recovery from wastewaters comparing two different sources of magnesium oxide in the precipitation of struvite.

机译：从废水中回收磷酸盐，比较了鸟粪石沉淀中两种不同来源的氧化镁。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Limited phosphate resources, increasing fertilizer prices and unsustainable methods of treating phosphates in wastewaters have resulted in the need for phosphate recovery technologies. One method involves the precipitation of a magnesium ammonium phosphate mineral called 'struvite' (MgNH 4PO4·6HO). Wastewaters often require an additional source of Mg2+ and a solution pH between 8 and 11 in order to achieve orthophosphate (OP) removal as struvite. This research examined 3 effluents to determine an ideal pH for producing the lowest residual values of OP. Two types of MgO were also tested for their ability to reduce OP concentrations: a pure chemical source and ground MgO refractories. Optimal pH levels were not determined, as it was likely that the supersaturation was too high to produce differences in OP removal. Chemical-grade MgO was more reactive than the refractories, and was therefore more effective in removing OP as struvite in wastes where Mg2+ was limiting. OP removal rates of >90% were achieved in each effluent.
机译：磷酸盐资源有限，肥料价格上涨以及废水中磷酸盐的不可持续处理方法导致对磷酸盐回收技术的需求。一种方法涉及沉淀称为“鸟粪石”（MgNH 4PO4·6HO）的磷酸铵镁矿物。为了实现鸟粪石的正磷酸盐（OP）去除，废水通常需要Mg2 +的附加来源和pH值在8和11之间的溶液。这项研究检查了3种废水，以确定产生最低残留OP值的理想pH。还测试了两种类型的MgO降低OP浓度的能力：纯化学源和磨碎的MgO耐火材料。由于过饱和度过高而无法在OP去除量上产生差异，因此无法确定最佳的pH值。化学级的MgO比耐火材料具有更高的反应活性，因此在限制Mg2 +的废物中作为鸟粪石去除OP更为有效。在每种废水中，OP去除率均> 90％。

著录项

  • 作者

    Lanning, Mary-Catherine E.;

  • 作者单位

    University of Guelph (Canada).;

  • 授予单位 University of Guelph (Canada).;
  • 学科 Geotechnology.;Geochemistry.;Engineering Sanitary and Municipal.
  • 学位 M.Sc.
  • 年度 2009
  • 页码 135 p.
  • 总页数 135
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质学;建筑科学;地质学;
  • 关键词

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