In search of a thermodynamic description of biomass yields for the chemotrophic growth of microorganisms
In search of a thermodynamic description of biomass yields for the chemotrophic growth of microorganisms
复制标题
寻找微生物化学营养生长的生物量产量的热力学描述
DOI：
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发表时间：
1992
影响因子：
3.8
通讯作者：
J. Van Dijken
中科院分区：
文献类型：
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作者：
J. Heijnen;J. Van Dijken
预测生物质产量的相关性是有价值的，并且已经发表了许多基于许多参数（YATP、YAve、ηo、Yc、吉布斯能量效率和焓效率）的建议。本文批判性地探讨了所提出的参数的一般适用性，以化能营养生长系统，热力学第二定律的明确关系，没有内在的问题，只有黑盒信息的要求的属性。似乎没有一个拟议的参数满足所有这些要求。特别地，各种能量效率参数遭受主要的固有问题。然而，本文将表明，单位产量生物质的吉布斯能量耗散（kJ/C-mod）是一个满足要求而没有内在问题的参数。发现了一个简单的相关性，其提供了吉布斯能量耗散/C-mol生物质作为C源性质的函数（表示为碳链长度和还原度）。这种耗散似乎几乎与电子受体的性质无关（例如，O2、NO3−、发酵）。因此，一个单一的相关性可以描述非常广泛的微生物生长系统。在这方面，吉布斯能量耗散比产热/C-mol生物质更有用，这强烈依赖于所使用的电子受体。有证据表明，甚至在某些生长系统中也可能发生净热吸收。
Correlations for the prediction of biomass yields are valuable, and many proposals based on a number of parameters (YATP, YAve, ηo, Yc, Gibbs energy efficiencies, and enthalpy efficiencies) have been published. This article critically examines the properties of the proposed parameters with respect to the general applicability to chemotrophic growth systems, a clear relation to the Second Law of Thermodynamics, the absence of intrinsic problems, and a requirement of only black box information. It appears that none of the proposed parameters satisfies all these requirements. Particularly, the various energetic efficiency parameters suffer from major intrinsic problems. However, this article will show that the Gibbs energy dissipation per amount of produced biomass (kJ/C‐mod) is a parameter which satisfies the requirements without having intrinsic problems. A simple correlation is found which provides the Gibbs energy dissipation/C‐mol biomass as a function of the nature of the C‐source (expressed as the carbon chain length and the degree of reduction). This dissipation appears to be nearly independent of the nature of the electron acceptor (e.g., O2, No3−, fermentation). Hence, a single correlation can describe a very wide range of microbial growth systems. In this respect, Gibbs energy dissipation is much more useful than heat production/C‐mol biomass, which is strongly dependent on the electron acceptor used. Evidence is presented that even a net heat‐uptake can occur in certain growth systems.