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首页> 外文学位 >Combined electrochemical & biological treatment of industrial wastewater using porous electrodes and a packed bed aerator.
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Combined electrochemical & biological treatment of industrial wastewater using porous electrodes and a packed bed aerator.

机译：使用多孔电极和填充床曝气器对工业废水进行电化学和生物处理相结合。

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摘要

Zinc, nickel and propylene glycol methyl ether were simultaneously removed from simulated wastewater in a column containing a counter-current packed bed and an electrochemical cell. Rectangular porous aluminum foam cathode and porous stainless steel anode were used in a plate-in-tank configuration. During combined biological and electrochemical treatment the wastewater flux was 0.00183 and 0.00915 m3·m-2·s -1 at a constant volumetric air flux of 0.0518 m3·m -2·s-1. Over a 72 hour treatment period the BOD5 was reduced by 32% and 55% for each volumetric liquid flux, respectively; zinc was reduced by 98% for both fluxes, and nickel was reduced by 95% and 82%, respectively. For sole electrochemical treatment of 48 hours, laminar and turbulent flow conditions were studied. Operating in the laminar flow region of 0.00183 and 0.00915 m3·m-2·s -1; zinc was reduced by 95% for both fluxes; nickel was reduced by 80% and 60%, respectively. For the turbulent region in the electrochemical cell, the volumetric liquid fluxes were 0.0137, 0.0229, 0.0321 and 0.0366 m3·m-2·s-1. Per cent reduction of both zinc and nickel in this region was less than that encountered in laminar flow. For all fluxes in the turbulent region zinc was reduced by 82%; nickel was reduced by 55% at a flux of 0.0137 m3·m -2·s-1 and 60% at a flux of 0.0366 m 3·m-2·s-1. Increasing electrode surface area as a means of improving heavy metal reduction by using rectangular porous material in a plate-in-tank configuration is not a viable option at higher volumetric liquid fluxes.
机译：在包含逆流填充床和电化学池的色谱柱中，从模拟废水中同时去除锌，镍和丙二醇甲醚。矩形多孔铝泡沫阴极和多孔不锈钢阳极用于板中配置。在生物和电化学联合处理过程中，在恒定体积空气流量为0.0518 m3·m -2·s-1的条件下，废水流量为0.00183和0.00915 m3·m-2·s -1。在72小时的处理时间内，每种体积液体通量的BOD5分别降低了32％和55％。两种焊剂的锌含量均降低了98％，镍的含量分别降低了95％和82％。对于仅48小时的电化学处理，研究了层流和湍流条件。在层流区域0.00183和0.00915 m3·m-2·s -1内运行；两种焊剂的锌均减少了95％；镍分别减少了80％和60％。对于电化学电池中的湍流区域，体积液体通量为0.0137、0.0229、0.0321和0.0366 m3·m-2·s-1。该区域锌和镍的减少百分比均小于层流中的百分比。对于湍流区域中的所有通量，锌减少了82％。镍在0.0137 m3·m -2·s-1的通量下还原了55％，在0.0366 m 3·m-2·s-1的通量下还原了60％。在板状容器中使用矩形多孔材料来增加电极表面积作为改善重金属还原的手段，在较高体积液体通量下不是可行的选择。

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  • 作者

    Mitzakov, Robert.;

  • 作者单位

    Ryerson University (Canada).;

  • 授予单位 Ryerson University (Canada).;
  • 学科 Engineering Chemical.
  • 学位 M.A.Sc.
  • 年度 2004
  • 页码 149 p.
  • 总页数 149
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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