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首页> 外文期刊>Environmental Science & Technology >Microscale Investigation of Anaerobic Biogas Production under Various Hydrodynamic Conditions
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Microscale Investigation of Anaerobic Biogas Production under Various Hydrodynamic Conditions

机译：各种水动力条件下厌氧沼气生产的微观研究

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摘要

This work presents an investigation at micro-scale of various mechanisms affecting anaerobic reactions within the microdevices. In particular, the effect of different hydrodynamic conditions associated with the granular particles' size and density on the biogas production was studied in order to intensify the performance of the anaerobic reactor. The image analysis techniques offer an opportunity to observe and quantify the nucleation and growth of biogas bubble at microscale on a single granule. In addition, the flow conditions were perfectly controlled in the microdevice, and the liquid flow fields were measured by a microparticle image velocimetry (micro-PIV) system. The effect of real hydrodynamic conditions exerted directly on granules onto the maximum biogas production rate was described for the first time. Finally, the role of hydrodynamic conditions on the biogas production at microscale is discussed through a straightforward relationship between the shear rates exerted on the granule and the optimal biogas production rate. The investigation reveals that big granules could have satisfactory biogas production ability under relatively weak hydrodynamic conditions. Thus they would be priority selection for industrial reactors.
机译：这项工作提出了在微观尺度上影响微型设备内厌氧反应的各种机制的研究。特别地，研究了与颗粒大小和密度相关的不同流体动力学条件对沼气生产的影响，以增强厌氧反应器的性能。图像分析技术提供了一个机会，可以在单个颗粒上以微尺度观察和量化沼气气泡的形核和生长。此外，在微设备中可以很好地控制流动条件，并通过微粒图像测速（micro-PIV）系统测量液体的流场。首次描述了直接作用在颗粒上的真实水动力条件对最大沼气生产率的影响。最后，通过施加在颗粒上的剪切速率与最佳沼气产生率之间的直接关系，讨论了流体动力学条件对微型沼气产生的作用。研究表明，在相对较弱的流体动力条件下，大颗粒可以具有令人满意的沼气生产能力。因此，它们将是工业反应堆的优先选择。

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  • 来源
    《Environmental Science & Technology》 |2012年第16期|p.8698-8704|共7页
  • 作者

    Jin B. Zhang; J. Wu; S. Poncing; M. Hamelin; Huai Z. Li;

  • 作者单位

    Laboratory of Reactions and Process Engineering, University of Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001 Nancy cedex, France;

    State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, P.R. China;

    Laboratory of Reactions and Process Engineering, University of Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001 Nancy cedex, France;

    Direction of International Action, ADEME, 27 rue Louis Vicat 75737 Paris cedex 15, France;

    Laboratory of Reactions and Process Engineering, University of Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001 Nancy cedex, France;

  • 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
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