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Effect of methanol on the biofiltration of n-hexane

机译：甲醇对正己烷生物滤池的影响

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摘要

This study investigated the removal of recalcitrant compounds in the presence of a hydrophilic compound. n-Hexane is used as a model compound to represent hydrophobic compounds. Methanol has been introduced in mixture with n-hexane in order to increase the bioavailability of n-hexane in trickle-bed-air-biofilters (TBABs). The mixing ratios investigated were: 70% methanol:30% n-hexane, and 80% methanol:20% n-hexane by volume. n-Hexane loading rates (LRs) ranged from 0.9 to 13.2grrr~(-3)h~(-1). Methanol LRs varied from 4.6 to 64.5 g m~(-1) h~(-1) and from 2.3 to 45.2 g m~(-3) h~(-1) depending upon the mixing ratio used. Biofilter performance, effect of mixing ratios of methanol to n-hexane, removal profile along biofilter depth, CODitrogen consumption and CO_2 production were studied under continuous loading operation conditions. Results have shown that the degradation of n-hexane is significantly enhanced by the presence of methanol for n-hexane LRs less than 13.2 g m~(-3) h~(-1). For n-hexane LR greater than 13.2gm~(-3) h~(-1), even though methanol had impacted n-hexane biodegradation, its removal efficiency was higher than our previous study for biodegradation of n-hexane alone, in presence of surfactant, or in presence of benzene. On the other hand, the degradation of methanol was not impacted by the presence of n-hexane.
机译：这项研究研究了在亲水性化合物存在下去除顽固性化合物的方法。正己烷用作代表疏水化合物的模型化合物。为了增加正己烷在滴流床空气生物滤池（TBAB）中的生物利用度，已将甲醇与正己烷混合引入。所研究的混合比例为：按体积计70％的甲醇：30％的正己烷和80％的甲醇：20％的正己烷。正己烷负载率（LRs）在0.9到13.2grrr〜（-3）h〜（-1）之间。取决于所使用的混合比例，甲醇LRs从4.6至64.5g m·（-1）h·（-1）变化而从2.3至45.2g m·（-3）h·（-1）变化。在连续加载操作条件下，研究了生物滤池的性能，甲醇与正己烷混合比的影响，沿生物滤池深度的去除曲线，COD /氮消耗和CO_2的产生。结果表明，对于小于13.2 g m〜（-3）h〜（-1）的正己烷LR，甲醇的存在显着增强了正己烷的降解。对于大于13.2gm〜（-3）h〜（-1）的正己烷LR，即使甲醇影响了正己烷的生物降解，其去除效率仍高于我们先前对存在的正己烷生物降解的研究。表面活性剂或在苯存在下。另一方面，甲醇的降解不受正己烷的存在影响。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第15期|p.176-182|共7页
  • 作者

    Abderrahman Zehraoui; Ashraf Aly Hassan; George A. Sorial;

  • 作者单位

    Environmental Engineering Program, School of Energy, Environmental, Biological and Medical Engineering, College of Engineering and Applied Science, University of Cincinnati, 701Engineering Research Center, 2624 Clifton Ave., Cincinnati, OH 45221-0012, USA;

    Office of Research and Development, NRMRL, US. Environmental Protection Agency, 26 West Martin Luther King Drive, Cincinnati, OH 45268, USA;

    Environmental Engineering Program, School of Energy, Environmental, Biological and Medical Engineering, College of Engineering and Applied Science, University of Cincinnati, 701Engineering Research Center, 2624 Clifton Ave., Cincinnati, OH 45221-0012, USA;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    biofiltration; n-Hexane; methanol; trickle-bed-air-biofilters (TBABs); VOCS;

    机译：生物过滤正己烷甲醇滴流式空气生物滤池（TBAB）;VOCS;

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