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A kinetic study on bacterial sulfate reduction

机译：细菌硫酸盐还原的动力学研究

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摘要

The activity of anaerobic sulfate reduction was studied using sulfate-reducing bacteria isolated from the water produced from a Brazilian oil reservoir. The effects of the initial sulfate concentration on the anaerobic sulfate reduction and sulfide generation kinetics were investigated. The redox potential, the biomass solution content, and the sulfate and the sulfide solution content were measured. The results indicate that the sulfate conversion and the sulfide generation are both first-order processes for the initial sulfate concentration of 823, 1,282, and 1,790 mg/L. The results for the kinetic constants for the sulfate conversion indicate an inhibition with the enhancement of the initial sulfate solution content. The kinetic constants for the sulfide generation indicate that this reaction is almost independent of the initial sulfate solution content due to the presence of at least two in-series processes that are faster than the microbial conversion of the sulfate. The kinetic test using the water from an onshore oil field, with an initial sulfide content of 228 mg/L and sulfate content of 947 mg/ L, shows a sulfate conversion of 50 % in 528 h. The kinetic modeling for the net content of sulfate and sulfide indicates that the sulfate conversion is slower for this water than for the deionized water tests; however, the sulfide formation has almost the same conversion velocity. The reactions are first order in both cases.
机译：使用从巴西油库生产的水中分离出的硫酸盐还原细菌研究了厌氧硫酸盐还原的活性。研究了初始硫酸盐浓度对厌氧硫酸盐还原和硫化物生成动力学的影响。测量氧化还原电势，生物质溶液含量以及硫酸盐和硫化物溶液含量。结果表明，硫酸盐初始转化浓度为​​823、1282和1790 mg / L时，硫酸盐转化和硫化物生成都是一阶过程。硫酸盐转化的动力学常数的结果表明随着初始硫酸盐溶液含量的增加而受到抑制。硫化物生成的动力学常数表明，由于存在至少两个比硫酸盐的微生物转化要快的串联过程，该反应几乎与初始硫酸盐溶液含量无关。使用陆上油田水进行的动力学测试表明，初始硫化物含量为228 mg / L，硫酸盐含量为947 mg / L，在528小时内硫酸盐转化率为50％。硫酸盐和硫化物净含量的动力学模型表明，与去离子水测试相比，该水的硫酸盐转化速度更慢。然而，硫化物的形成具有几乎相同的转化速度。在两种情况下，反应都是一阶反应。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2013年第12期|1861-1869|共9页
  • 作者

    L. A. Bernardez; L. R. P. de Andrade Lima; E. B. de Jesus; C. L. S. Ramos; P. F. Almeida;

  • 作者单位

    Department of Bio-Interaction Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon, s, Vale do Canela, Salvador, Bahia 40110-902, Brazil;

    Department of Materials Science and Technology, Federal University of Bahia, C.P. 6974, Salvador, Bahia 41810-971, Brazil;

    Department of Materials Science and Technology, Federal University of Bahia, C.P. 6974, Salvador, Bahia 41810-971, Brazil;

    Department of Bio-Interaction Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon, s, Vale do Canela, Salvador, Bahia 40110-902, Brazil;

    Department of Bio-Interaction Sciences, Federal University of Bahia, Av. Reitor Miguel Calmon, s, Vale do Canela, Salvador, Bahia 40110-902, Brazil;

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

    Souring; Sulfate-reducing bacteria; Sulfide; Kinetics;

    机译：酸味;硫酸盐还原菌;硫化物;动力学;

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