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首页> 外文期刊>Environmental Science & Technology >A Novel Anaerobic Electrochemical Membrane Bioreactor (AnEMBR) with Conductive Hollow-fiber Membrane for Treatment of Low-Organic Strength Solutions
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A Novel Anaerobic Electrochemical Membrane Bioreactor (AnEMBR) with Conductive Hollow-fiber Membrane for Treatment of Low-Organic Strength Solutions

机译：一种新型的带有导电中空纤维膜的厌氧电化学膜生物反应器（AnEMBR），用于处理低有机强度溶液

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摘要

A new anaerobic treatment system that combined a microbial electrolysis cell (MEC) with membrane filtration using electrically conductive, porous, nickel-based hollow-fiber membranes (Ni-HFMs) was developed to treat low organic strength solution and recover energy in the form of biogas. This new system is called an anaerobic electrochemical membrane bioreactor (AnEMBR). The Ni-HFM served the dual function as the cathode for hydrogen evolution reaction (HER) and the membrane for filtration of the effluent. The AnEMBR system was operated for 70 days with synthetic acetate solution having a chemical oxygen demand (COD) of 320 mg/L. Removal of COD was ＞95% at all applied voltages tested. Up to 71% of the substrate energy was recovered at an applied voltage of 0.7 V as methane rich biogas (83% CH_4; ＜ 1% H_2) due to biological conversion of the hydrogen evolved at the cathode to methane. A combination of factors (hydrogen bubble formation, low cathode potential and localized high pH at the cathode surface) contributed to reduced membrane fouling in the AnEMBR compared to the control reactor (open circuit voltage). The net energy required to operate the AnEMBR system at an applied voltage of 0.7 V was significantly less (0.27 kWh/m~3) than that typically needed for wastewater treatment using aerobic membrane bioreactors (1-2 kWh/m~3).
机译：开发了一种新的厌氧处理系统，该系统将微生物电解池（MEC）与使用导电的多孔镍基中空纤维膜（Ni-HFMs）进行膜过滤相结合，用于处理低有机强度溶液并以以下形式回收能量：沼气。这种新系统称为厌氧电化学膜生物反应器（AnEMBR）。 Ni-HFM具有双重作用，既可以作为放氢反应（HER）的阴极，又可以作为膜过滤出水。 AnEMBR系统在化学需氧量（COD）为320 mg / L的合成乙酸盐溶液中运行70天。在所有测试的施加电压下，COD的去除率均> 95％。通过施加0.7 V的电压，作为富甲烷沼气（83％CH_4； ＜1％H_2）可以回收高达71％的底物能量，这是由于在阴极逸出的氢生物转化为甲烷。与对照反应器（开路电压）相比，多种因素（氢气气泡的形成，阴极电位低和阴极表面局部高pH）的综合作用有助于减少AnEMBR中的膜污染。在0.7V的施加电压下运行AnEMBR系统所需的净能量明显低于使用好氧膜生物反应器进行废水处理所需要的净能量（0.27 kWh / m〜3）。

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  • 来源
    《Environmental Science & Technology》 |2014年第21期|12833-12841|共9页
  • 作者

    Krishna P. Katuri; Craig M. Werner; Rodrigo J. Jimenez-Sandoval; Wei Chen; Sungil Jeon; Bruce E. Logan; Zhiping Lai; Gary L. Amy; Pascal E. Saikaly;

  • 作者单位

    King Abdullah University of Science and Technology, Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center, Thuwal 23955-6900, Saudi Arabia;

    King Abdullah University of Science and Technology, Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center, Thuwal 23955-6900, Saudi Arabia;

    King Abdullah University of Science and Technology, Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center, Thuwal 23955-6900, Saudi Arabia;

    King Abdullah University of Science and Technology, Advanced Membranes and Porous Materials Research Center, Thuwal 23955-6900, Kingdom of Saudi Arabia;

    King Abdullah University of Science and Technology, Advanced Membranes and Porous Materials Research Center, Thuwal 23955-6900, Kingdom of Saudi Arabia;

    Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States;

    King Abdullah University of Science and Technology, Advanced Membranes and Porous Materials Research Center, Thuwal 23955-6900, Kingdom of Saudi Arabia;

    King Abdullah University of Science and Technology, Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center, Thuwal 23955-6900, Saudi Arabia;

    King Abdullah University of Science and Technology, Biological and Environmental Sciences and Engineering Division, Water Desalination and Reuse Center, Thuwal 23955-6900, Saudi Arabia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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