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首页> 外文期刊>Applied Microbiology and Biotechnology >BTEX catabolism interactions in a toluene-acclimatized biofilter
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BTEX catabolism interactions in a toluene-acclimatized biofilter

机译：甲苯适应性生物滤池中的BTEX分解代谢相互作用

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BTEX substrate interactions for a toluene-acclimatized biofilter consortium were investigated. Benzene, ethylbenzene, o-xylene, m-xylene and p-xylene removal efficiencies were determined at a loading rate of 18.07 g m−3 h−1 and retention times of 0.5–3.0 min. This was also repeated for toluene in a 1:1 (m/m) ratio mixture (toluene: benzene, ethylbenzene, or xylene ) with each of the other compounds individually to obtain a final total loading of 18.07 g m−3 h−1. The results obtained were modelled using Michaelis–Menten kinetics and an explicit finite difference scheme to generate v max and K m parameters. The v max/K m ratio (a measure of the catalytic efficiency, or biodegradation capacity, of the reactor) was used to quantify substrate interactions occurring within the biofilter reactor without the need for free-cell suspended and monoculture experimentation. Toluene was found to enhance the catalytic efficiency of the reactor for p-xylene, while catabolism of all the other compounds was inhibited competitively by the presence of toluene. The toluene-acclimatized biofilter was also able to degrade all of the other BTEX compounds, even in the absence of toluene. The catalytic efficiency of the reactor for compounds other than toluene was in the order: ethylbenzene>benzene>o-xylene>m-xylene>p-xylene. The catalytic efficiency for toluene was reduced by the presence of all other tested BTEX compounds, with the greatest inhibitory effect being caused by the presence of benzene, while o-xylene and p-xylene caused the least inhibitory effect. This work illustrated that substrate interactions can be determined directly from biofilter reactor results without the need for free-cell and monoculture experimentation.
机译：研究了甲苯适应性生物滤池联盟的BTEX底物相互作用。测定了苯，乙苯，邻二甲苯，间二甲苯和对二甲苯的去除效率，其负载率为18.07 g m-3 h-1 ，保留时间为0.5–3.0分钟。对于甲苯与其他化合物分别以1：1（m / m）的混合物（甲苯：苯，乙苯或二甲苯）的混合物重复上述操作，最终总装载量为18.07 gm-3 h-1 。使用Michaelis–Menten动力学和显式有限差分方案对所得结果进行建模，以生成v max 和K m 参数。使用v max / K m 比（反应器的催化效率或生物降解能力的量度）来量化生物滤池反应器中发生的底物相互作用，而无需悬浮游离细胞和单培养实验。发现甲苯增强了反应器对对二甲苯的催化效率，而所有其他化合物的分解代谢都因甲苯的存在而竞争性地受到抑制。即使在没有甲苯的情况下，适应甲苯的生物滤池也能够降解所有其他BTEX化合物。该反应器对除甲苯以外的化合物的催化效率的顺序为：乙苯>苯>邻二甲苯>间二甲苯>对二甲苯。所有其他测试的BTEX化合物的存在都会降低甲苯的催化效率，其中最大的抑制作用是苯的存在，而邻二甲苯和对二甲苯的抑制作用则最小。这项工作表明，可以直接从生物滤池反应器结果确定底物相互作用，而无需进行游离细胞和单培养实验。

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  • 来源
    《Applied Microbiology and Biotechnology》 |2001年第1期|122-128|共7页
  • 作者

    C. A. du Plessis; J. M. Strauss; K.-H. J. Riedel;

  • 作者单位

    Department of Microbiology and Biochemistry University of the Orange Free State PO Box 339 Bloemfontein 9301 South Africa e-mail: CAduPlessis@Billiton.co.za Fax: +27-11-7927097;

    Department of Microbiology and Biochemistry University of the Orange Free State PO Box 339 Bloemfontein 9301 South Africa e-mail: CAduPlessis@Billiton.co.za Fax: +27-11-7927097;

    Department of Microbiology and Biochemistry University of the Orange Free State PO Box 339 Bloemfontein 9301 South Africa e-mail: CAduPlessis@Billiton.co.za Fax: +27-11-7927097;

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