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Fenton-biological treatment of reverse osmosis membrane concentrate from a metal plating wastewater recycle system

机译：金属电镀废水循环系统中反渗透膜浓缩液的芬顿生物处理

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摘要

Although reverse osmosis (RO) has been widely used in the recycling of metal plating wastewater, organic compounds and heavy metals in the RO concentrate are difficult to remove by conventional treatment. A combination process including Fenton oxidation and a biological aerated filter was used to treat RO concentrate containing complex Cu and Ni from metal plating. During the Fenton treatment, Cu and Ni ions were released due to degradation of organic compounds and then removed by pH adjustment and coagulation. The concentrate was further treated using by a biological aerated filter. Optimum conditions were as follows: initial pH of influent of 4.0; dosage of H_2O_2 of 5.0 mmol l-1; ratio of n(Fe~2+)(H_2O_2) of 0.8; precipitation pH of Cu andNi ions of 8.0; and a hydraulic retention time of the biological aerated filter of 2.5 h. The results showed that concentrations of effluent COD, Cu and Ni ions were less than 40 mg I-1, 0.5 mg I-1 and 0.3 mg I-1, respectively; this means the treated effluent meets the emission standards for pollutants from electroplating set by China's Environmental Protection Agency.
机译：尽管反渗透（RO）已广泛用于金属电镀废水的回收，但RO精矿中的有机化合物和重金属很难通过常规处理去除。结合了Fenton氧化和生物曝气过滤器的组合工艺，用于处理金属镀层中含有复杂Cu和Ni的RO精矿。在Fenton处理过程中，由于有机化合物的降解而释放出Cu和Ni离子，然后通过pH调节和凝结去除。通过生物曝气过滤器进一步处理浓缩物。最佳条件如下：进水的初始pH为4.0； H_2O_2的剂量为5.0 mmol l-1； n（Fe〜2 +）/ n（H_2O_2）之比为0.8; Cu和Ni离子的沉淀pH为8.0；曝气生物滤池的水力停留时间为2.5小时。结果表明，废水中的COD，Cu和Ni离子浓度分别小于40 mg I-1、0.5 mg I-1和0.3 mg I-1。这意味着处理后的废水符合中国环境保护局制定的电镀污染物排放标准。

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  • 来源
    《Environmental Technology》 |2011年第6期|p.515-522|共8页
  • 作者

    R.M. Huang; J.Y. He; J. Zhao; Q. Luo; CM. Huang;

  • 作者单位

    School of Environmental Science and Engineering, South China University of Technology, Guangzhou,People's Republic of China;

    School of Environmental Science and Engineering, South China University of Technology, Guangzhou,People's Republic of China;

    School of Environmental Science and Engineering, South China University of Technology, Guangzhou,People's Republic of China;

    School of Environmental Science and Engineering, South China University of Technology, Guangzhou,People's Republic of China;

    School of Environmental Science and Engineering, South China University of Technology, Guangzhou,People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fenton reagent oxidation; biological aerated filter; metal plating wastewater; ro concentrate; metal complex;

    机译：芬顿试剂氧化;曝气生物滤池;金属电镀废水;精矿金属络合物;

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