...
首页> 外文期刊>Environmental Engineering Science >Reducing the Heavy Metal Content of Sewage Sludge by Advanced Sludge Treatment Methods
【24h】

Reducing the Heavy Metal Content of Sewage Sludge by Advanced Sludge Treatment Methods

机译:通过先进的污泥处理方法降低污水污泥中的重金属含量

获取原文
获取原文并翻译 | 示例
           

摘要

Waste-activated sludge (WAS) processes are key technologies to treat wastewater: their effluents can meet stringent discharge standards, thus ensuring a minimum residual impact on the aquatic environment. The presence of heavy metals in the excess sludge poses, however, serious problems, and considerably hampers the final disposal alternatives, especially in the agricultural use (soil improvement/amendment). This article studies the effect of thermal hydrolysis and Fenton's peroxidation on the heavy metal content of the dewatered sludge. Acid thermal hydrolysis reduces the heavy metal content in the filter cake except for Cu, Hg, and Pb. Alkaline thermal hydrolysis releases Cu, Pb, and Cr. Fenton's peroxidation transfers Cd, Cu, and Ni from the filter cake into the filtrate. Land application of the residual cake can hence be reconsidered.
机译:废物活性污泥(WAS)工艺是处理废水的关键技术:其废水可以满足严格的排放标准,从而确保对水生环境的残留影响最小。然而,过量污泥中重金属的存在带来了严重的问题,并且极大地阻碍了最终处置的替代方案,特别是在农业用途中(土壤改良/改良)。本文研究了热水解和芬顿过氧化对脱水污泥中重金属含量的影响。酸热水解可减少滤饼中除Cu,Hg和Pb之外的重金属含量。碱性热水解释放出Cu,Pb和Cr。 Fenton的过氧化作用将Cd,Cu和Ni从滤饼转移到滤液中。因此可以重新考虑剩余饼的土地施用。

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