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首页> 外文期刊>Separation and Purification Technology >Enhanced chromium recovery and simultaneous sludge degradation in a novel bioelectrochemical system assembled with bio/abio-cathodes
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Enhanced chromium recovery and simultaneous sludge degradation in a novel bioelectrochemical system assembled with bio/abio-cathodes

机译：具有Bio / Abio-阴极的新型生物电化学系统中增强的铬回收和同时污泥降解

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摘要

A novel five-chamber bioelectrochemical system (BES) consisting of bio/abio-cathodes and a precipitation chamber was constructed for enhanced chromium recovery with simultaneous sludge degradation. The results revealed that the BES obtained a Cr(VI) reduction efficiency of 99.93 +/- 0.63% and collected 82.2 +/- 4.2 mg precipitate/cycle on the bottom of the precipitation chamber instead of very little on the surface of the abio-cathode. Thus, it has the advantages of sustainably recycling more chromium and avoiding cleaning the cathode after every cycle. The Cr2O72- and HCrO4- were transformed into Cr3+, Cr(OH)(2+), Cr-2(OH)(4+), and Cr-3(OH)(4)(5+) and the precipitate that was mainly composed of Cr2O3 in the precipitation chamber ultimately. At the end of 147 h, the total chemical oxygen demand removal efficiency of the sludge was 9.37 +/- 0.62%. The maximum power density of 3.68 +/- 0.23 W/m(3) was generated in the BES. This study provides an alternative technology to obtain a high rate of chromium recovery and synchronous sludge degradation.
机译：构建了由生物/ abio-阴极和沉淀室组成的新型五室生物电化学系统（BES），以提高铬恢复，同时污泥降解。结果表明，BES获得了CR（VI）的抑制效率为99.93 +/- 0.63％，并在沉淀室的底部收集82.2 +/- 4.2mg沉淀/循环，而不是在ABIO的表面上很少阴极。因此，它具有可持续地回收更多铬并避免在每个循环之后清洁阴极的优点。将Cr2O72和HCRO 4转化为Cr3 +，Cr（OH）（2+），Cr-2（OH）（4+）和Cr-3（OH）（4）（5+），沉淀物主要由沉淀室中的CR2O3组成。在147小时结束时，污泥的总化学氧需求去除效率为9.37 +/- 0.62％。在BES中产生3.68 +/- 0.23 W / m（3）的最大功率密度。该研究提供了一种替代技术，可获得高铬回收率和同步污泥降解。

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  • 作者

    Yu Hang; Zhao Qingliang; Liu Xiaonan; Meng Fanchao; Ruan Lingyu; Sun Tiantian; Liu Weifeng; Zhu Yimin; Li Wei; Meng Fanyu; Liang Zhuyuan;

  • 作者单位

    Dalian Maritime Univ Collaborat Innovat Ctr Vessel Pollut Monitoring &

    Dalian 116026 Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resources &

    Environm SK Harbin 150090 Peoples R China;

    Dalian Maritime Univ Collaborat Innovat Ctr Vessel Pollut Monitoring &

    Dalian 116026 Peoples R China;

    Dalian Maritime Univ Collaborat Innovat Ctr Vessel Pollut Monitoring &

    Dalian 116026 Peoples R China;

    Dalian Maritime Univ Collaborat Innovat Ctr Vessel Pollut Monitoring &

    Dalian 116026 Peoples R China;

    Dalian Maritime Univ Collaborat Innovat Ctr Vessel Pollut Monitoring &

    Dalian 116026 Peoples R China;

    Dalian Maritime Univ Collaborat Innovat Ctr Vessel Pollut Monitoring &

    Dalian 116026 Peoples R China;

    Dalian Maritime Univ Collaborat Innovat Ctr Vessel Pollut Monitoring &

    Dalian 116026 Peoples R China;

    Dalian Maritime Univ Collaborat Innovat Ctr Vessel Pollut Monitoring &

    Dalian 116026 Peoples R China;

    Harbin Med Univ Sch Publ Hlth Dept Environm Hyg Harbin 150081 Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resources &

    Environm SK Harbin 150090 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分离过程;气化工艺;
  • 关键词

    Bioelectrochemical system; Chromium recovery; Transformation mechanism; Excess sludge; Electricity generation;

    机译：生物电化学系统;铬恢复;转化机制;多余的污泥;发电;

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