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Theoretical and Experimental Adhesion of Yeast Strains with High Chromium Removal Potential

机译:具有高脱铬潜能的酵母菌的理论和实验粘附

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摘要

Biofilm-based bioprocesses are increasingly used in wastewater treatment. Microbial adhesion constitutes the key step in stability of these depollution systems. For adhesion studies, physicochemical characterization of microbial cells and supports has proved to be of extreme importance. In this work, estimation of interaction between five yeast strains with a high potential for Cr (VI) removal using extended Derjaguin-Landau-Verwey and Overbeek (XDLVO) theory as a powerful predictive tool of adhesion was investigated. Predictions showed that wood husk could be a good support for the formation of tested yeast biofilm, beech and oak exhibit better properties than other wood species studied with 100% of potential for adhesion. From a thermodynamic point of view, pine and teak woods are not suitable for biofilm formation for all tested yeast strains, presenting positive values of free energy adhesion (Delta G(XDLVO)). Environmental scanning electronic microscopy (ESEM) and Matlab (R) image analysis confirmed that all tested yeast strains were able to adhere to pine wood and, except for Wickerhamomyces anomalus they were unable to adhere to oak wood. Adhesion experiments were found to be well related to the theoretical prediction. To our knowledge, this is the first study dealing with biofilm-mediated depollution from an adhesion point of view aiming to optimize the stability of the system. It allows expanding knowledge about adhesion phenomena of yeast strains on wooden surface and contributes to select the best biofilm-support combination that would be used in a performant biological system for chromium removal.
机译:基于生物膜的生物过程越来越多地用于废水处理。微生物附着是这些脱污染系统稳定性的关键步骤。对于粘附研究,已证明微生物细胞和支持物的理化特性极其重要。在这项工作中,研究了使用扩展的Derjaguin-Landau-Verwey和Overbeek(XDLVO)理论作为粘附力的强大预测工具,对五种具有高去除Cr(VI)潜力的酵​​母菌株之间的相互作用进行了研究。预测表明,木壳可能是形成经测试的酵母生物膜的良好支撑,山毛榉和橡树比其他研究过的具有100%附着力的木种具有更好的性能。从热力学角度来看,松木和柚木不适合所有测试酵母菌株的生物膜形成,其表现出自由能粘附的正值(Delta G(XDLVO))。环境扫描电子显微镜(ESEM)和Matlab(R)图像分析证实,所有测试的酵母菌株都能够粘附在松木上,除了异常柳条(Wickerhamomyces anomalus),它们都无法粘附在橡木上。发现粘合实验与理论预测密切相关。据我们所知,这是从粘附角度出发,旨在优化系统稳定性的第一项研究,涉及生物膜介导的污染。它允许扩展有关酵母菌株在木质表面上的粘附现象的知识,并有助于选择最佳的生物膜-载体组合,该组合将在高性能生物系统中用于去除铬。

著录项

  • 来源
    《Environmental Engineering Science》 |2017年第10期|693-702|共10页
  • 作者单位

    Univ Sidi Mohamed Ben Abdellah, Lab Biotechnol Microbienne, Fac Sci & Tech, Fes, Morocco;

    Univ Sidi Mohamed Ben Abdellah, Lab Biotechnol Microbienne, Fac Sci & Tech, Fes, Morocco|CNRS Univ Toulouse INPT, Lab Genie Chim, Toulouse, France;

    Univ Sidi Mohamed Ben Abdellah, Lab Biotechnol Microbienne, Fac Sci & Tech, Fes, Morocco;

    Univ Sidi Mohamed Ben Abdellah, Lab Biotechnol Microbienne, Fac Sci & Tech, Fes, Morocco|Univ Sidi Mohamed Ben Abdellah, Ctr Univ Reg Interface, Fes, Morocco;

    Univ Sidi Mohamed Ben Abdellah, Lab Biotechnol Microbienne, Fac Sci & Tech, Fes, Morocco;

    Univ Sidi Mohamed Ben Abdellah, Lab Biotechnol Microbienne, Fac Sci & Tech, Fes, Morocco|Univ Sidi Mohamed Ben Abdellah, Ctr Univ Reg Interface, Fes, Morocco;

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

    adhesion; wastewater; wood husk; XDLVO theory; yeast strains;

    机译:附着力;废水;木皮;XDLVO理论;酵母菌株;
  • 入库时间 2022-08-17 13:28:33

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