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首页> 外文期刊>Environmental toxicology and chemistry >INFLUENCE OF HEAVY METALS ON MICROBIAL GROWTH KINETICS INCLUDING LAG TIME: MATHEMATICAL MODELING AND EXPERIMENTAL VERIFICATION
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INFLUENCE OF HEAVY METALS ON MICROBIAL GROWTH KINETICS INCLUDING LAG TIME: MATHEMATICAL MODELING AND EXPERIMENTAL VERIFICATION

机译：重金属对包括滞后时间在内的微生物生长动力学的影响：数学建模和实验验证

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摘要

Heavy metals can significantly affect the kinetics of substrate biodegradation and microbial growth, including lag times and specific growth rates. A model to describe microbial metabolic lag as a function of the history of substrate concentration has been previously described by Wood et al. (Water Resour Res 31:553-563) and Ginn (Water Resour Res 35:1395-1408). In the present study, this model is extended by including the effect of heavy metals on metabolic lag by developing an inhibitor-dependent functional to account for the metabolic state of the microorganisms. The concentration of the inhibiting metal is explicitly incorporated into the functional. The validity of the model is tested against experimental data on the effects of zinc on Pseudomonas species isolated from Lake Coeur d'Alene sediments, Idaho. USA, as well as the effects of nickel or cobalt on a mixed microbial culture collected from the aeration tank of a wastewater treatment plant in Athens, Greece. The simulations demonstrate the ability to incorporate the effect of metals on metabolism through lag, yield coefficient, and specific growth rates. The model includes growth limitation due to insufficient transfer of oxygen into the growth medium.
机译：重金属会显着影响底物生物降解和微生物生长的动力学，包括滞后时间和比生长速率。 Wood等人先前已经描述了一种描述微生物代谢滞后随底物浓度的变化而变化的模型。 （Water Resour Res 31：553-563）和Ginn（Water Resour Res 35：1395-1408）。在本研究中，通过开发重金属依赖抑制剂的功能来解释微生物的代谢状态，从而扩展了重金属对代谢滞后的影响，从而扩展了该模型。抑制性金属的浓度明确地并入功能中。针对锌对从爱达荷州科达伦湖沉积物中分离出的假单胞菌物种的影响的实验数据，测试了该模型的有效性。美国，以及镍或钴对从希腊雅典废水处理厂曝气池收集的混合微生物培养物的影响。模拟显示了通过滞后，产量系数和比生长速率吸收金属对代谢的影响的能力。该模型包括由于氧气无法充分转移到生长培养基中而导致的生长限制。

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  • 来源
    《Environmental toxicology and chemistry》 |2009年第10期|2020-2029|共10页
  • 作者

    S. Sevinc Sengoer; Sutapa Barua; Petros Gikas; Timothy R. Ginn; Brent Peyton; Rajesh K. Sani; Nicolas F. Spycher;

  • 作者单位

    Department of Civil and Environmental Engineering, University of California at Davis, Davis, California 95616, USA;

    Department of Chemical and Biological Engineering, Montana State University Bozeman, Montana 59717-3920, USA;

    Department of Civil and Environmental Engineering, University of California at Davis, Davis, California 95616, USA Special Service of Public Works for Greater Athens Sewerage and Sewage Treatment,Hellenic Ministry of Environmental Planning and Public Works, Varvaki 12, 11474 Athens, Greece;

    Department of Civil and Environmental Engineering, University of California at Davis, Davis, California 95616, USA;

    Department of Chemical and Biological Engineering, Montana State University Bozeman, Montana 59717-3920, USA;

    Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City,South Dakota 57701, USA;

    Earth Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, 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

    growth inhibition kinetics; heavy metals; metabolic lag; modeling;

    机译：生长抑制动力学;重金属;代谢滞后造型;

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