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首页> 外文期刊>Environmental Science & Technology >High Current Generation Coupled to Caustic Production Using a Lamellar Bioelectrochemical System
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High Current Generation Coupled to Caustic Production Using a Lamellar Bioelectrochemical System

机译：使用层状生物电化学系统将高电流产生耦合至苛性碱产生

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摘要

Recently, bioelectrochemical systems (BESs) have emerged as a promising technology for energy and product recovery from wastewaters. To become economically viable, BESs need to (ⅰ) reach sufficient turnover rates at scale and (ⅱ) generate a product that offsets the investment costs within a reasonable time frame. Here we used a liter scale, lamellar BES to produce a caustic solution at the cathode. The reactor was operated asa three-electrode system, in which the anode potential was fixed and power was supplied over the reactor to allow spontaneous anodic current generation. In laboratory conditions, with acetate as electron donor in the anode, the system generated up to 1.05 A (at 1.77 V applied cell voltage, 1015 A m~(-3) anode volume), and allowed for the production of caustic to 3.4 wt %, at an acetate to caustic efficiency of 61%. The reactor was subsequently operated on a brewery site, directly using effluent from the brewing process. Currents of up to 0.38 A were achieved within a six-week time frame. Considerable fluctuations over weekly periods were observed, due to operational parameter changes. This study is the first to demonstrate effective production of caustic at liter scale, using BESs both in laboratory and field conditions. It also shows that input of power can easily be justified by product value.
机译：最近，生物电化学系统（BESs）成为一种有前途的技术，可以从废水中回收能量和产品。为了在经济上可行，BES必须（ⅰ）达到足够的周转率，并且（ⅱ）产生能够在合理时间内抵消投资成本的产品。在这里，我们使用了升级的层状BES在阴极处产生苛性碱溶液。反应器作为三电极系统运行，其中阳极电势固定，并在反应器上供电以允许自发产生阳极电流。在实验室条件下，使用乙酸盐作为阳极中的电子供体，该系统产生高达1.05 A（在施加1.77 V电池电压，1015 A m〜（-3）阳极体积时），并产生苛性碱至3.4 wt ％，乙酸盐至苛性碱效率为61％。随后，直接使用酿造过程中的废水在啤酒厂现场运行反应器。在六周的时间内实现了高达0.38 A的电流。由于操作参数的变化，每周观察到很大的波动。这项研究是首次证明在实验室和野外条件下使用BES都能有效生产升量苛性碱。这也表明，功率的输入可以很容易地由产品价值来证明。

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  • 来源
    《Environmental Science & Technology》 |2010年第11期|P.4315-4321|共7页
  • 作者

    KORNEE L. RABAEY; SIMONE BUETZER; SHELLEY BROWN; JUERG KELLER; RENE A. ROZENDAL;

  • 作者单位

    Advanced Water Management Centre, Gehrmann Building, The University of Queensland. Brisbane. Queensland 4072, Australia;

    rnAdvanced Water Management Centre, Gehrmann Building, The University of Queensland. Brisbane. Queensland 4072, Australia;

    rnAdvanced Water Management Centre, Gehrmann Building, The University of Queensland. Brisbane. Queensland 4072, Australia;

    rnAdvanced Water Management Centre, Gehrmann Building, The University of Queensland. Brisbane. Queensland 4072, Australia;

    rnAdvanced Water Management Centre, Gehrmann Building, The University of Queensland. Brisbane. Queensland 4072, Australia;

  • 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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  • 正文语种 eng
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