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Modelling gas-liquid VOCs transport in two-liquid phase partitioning bioreactors

机译：模拟两液相分配生物反应器中的气液VOC传输

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摘要

A mechanistic model capable to accurately describe the mass transport of hexane in a two-liquid phase partitioning bioreactor (TLPB) constructed with silicone oil was developed. This work constitutes the first step in the development of simple and reliable models for the mathematical description of the off-gas treatment of volatile organic contaminants in TLPBs. The model (based on general mass balances and transport equations over off-gas rising bubbles) predicted a negative linear relationship between the fraction of organic phase and the logarithm of the pollutant fraction that remains in the gas phase. The average relative errors of the model predictions were lower than 7%. Under the tested range of operational conditions (organic phase fractions and stirring rates ranging from 5% to 30% and from 100 to 300 rpm, respectively) the maximum hexane fraction transferred from the gas to the liquid (aqueous + organic) phase increased at increasing stirring rates and silicone oil fractions up to 200 rpm and 20%, respectively. In addition, the proposed modelling approach quantified the proximity of the dispersion to thermodynamic equilibrium conditions, predicting thus the degree of mixing in the systems.
机译：建立了能够准确描述己烷在硅油构成的两液相分配生物反应器（TLPB）中的传质机理的机理模型。这项工作构成了开发简单可靠的模型的第一步，该模型用于对TLPB中的挥发性有机污染物进行废气处理的数学描述。该模型（基于一般质量平衡和尾气上升气泡的输运方程式）预测有机相的分数与残留在气相中的污染物的对数之间呈负线性关系。模型预测的平均相对误差低于7％。在测试的运行条件范围内（有机相馏分和搅拌速率分别为5％至30％和100至300 rpm），从气相转移到液相（水+有机）的最大己烷馏分随温度的升高而增加。搅拌速度和硅油馏分分别高达200 rpm和20％。另外，提出的建模方法量化了分散体与热力学平衡条件的接近度，从而预测了系统中的混合程度。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2010年第6期|1139-1145|共7页
  • 作者

    S. Bordel; M. Hernandez; S. Villaverde; R. Munoz;

  • 作者单位

    Department of Chemical Engineering and Environmental Technology, University of Valladolid, Paseo del Prado de la Magdalena s, 47011 Valladolid, Spain Department of Chemical and Biological Engineering, Chalmers University of Technology, Kemivagen 10, Goeteborg, Sweden;

    Department of Chemical Engineering and Environmental Technology, University of Valladolid, Paseo del Prado de la Magdalena s, 47011 Valladolid, Spain;

    Department of Chemical Engineering and Environmental Technology, University of Valladolid, Paseo del Prado de la Magdalena s, 47011 Valladolid, Spain;

    Department of Chemical Engineering and Environmental Technology, University of Valladolid, Paseo del Prado de la Magdalena s, 47011 Valladolid, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    gas-liquid mass transport; hexane; hydrophobic VOCs; silicone oil; two-liquid phase bioreactors;

    机译：气液传质己烷疏水性VOC;硅油;两液相生物反应器;

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