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首页> 外文期刊>Bioprocess and Biosystems Engineering >Kinetic modelling of the sequential production of lactic acid and xylitol from vine trimming wastes
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Kinetic modelling of the sequential production of lactic acid and xylitol from vine trimming wastes

机译：葡萄修剪废料顺序生产乳酸和木糖醇的动力学模型

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摘要

A mathematical model describing the kinetics of the sequential production of lactic acid and xylitol from detoxified-concentrated vine trimming hemicellulosic hydrolysates by Lactobacillus rhamnosus and Debary-omyces hansenii, respectively, was developed from the basic principles of mass balance in two stages considering as main reactions: (1) glucose and xylose consumption by L rhamnosus; and (2) xylitol and arabitol production by D. hansenii. The model allows to evaluate the yields and productivities under microaerobic and oxygen restricted conditions (in particular the effects caused by purging the oxygen with nitrogen), which were particularly important during the xylose to xylitol bioconversion by yeasts. The model was tested using experimental data obtained from detoxified-concentrated hemicellulosic hydrolysates, after CaCO_3 addition in both types of fermentation processes, without purges (microaerobic conditions) or purging oxygen with nitrogen (oxygen-limited conditions) after sampling in order to reduce the oxygen dissolved. L. rhamnosus was removed by microfiltration before adding D. hansenii at the beginning of the second stage. Mass balance-based and logistic functions were successfully applied to develop the model of the system which properly predicts the consumption of sugars as well as the metabolites produced and yields. The dynamics of fermentation were also adequately described by the developed model.
机译：根据鼠李糖乳杆菌和汉逊德巴利-酵母菌的质量平衡基本原理，建立了一个数学模型，该模型描述了鼠李糖乳杆菌和汉逊德巴利-酵母菌分别从解毒浓缩的藤条修剪半纤维素水解物中依次生产乳酸和木糖醇的动力学。 ：（1）鼠李糖消耗葡萄糖和木糖； （2）汉森D. hansenii生产的木糖醇和阿拉伯糖醇。该模型可以评估微需氧和氧气受限条件下的产量和生产率（特别是通过用氮气吹扫氧气引起的影响），这在酵母将木糖转化为木糖醇的过程中尤为重要。使用从解毒浓缩的半纤维素水解产物获得的实验数据对模型进行测试，在两种发酵过程中添加CaCO_3后，在采样后不进行吹扫（微有氧条件）或用氮气吹扫氧气（氧气受限的条件）以减少氧气溶解。通过微滤除去鼠李糖乳杆菌，然后在第二阶段开始时添加汉森氏杆菌。基于质量平衡和逻辑功能成功地开发了系统模型，该模型可以正确预测糖的消耗以及产生的代谢物和产量。所开发的模型也充分描述了发酵动力学。

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  • 来源
    《Bioprocess and Biosystems Engineering》 |2011年第7期|p.869-878|共10页
  • 作者

    Carlos Garcia-Dieguez; Jose Manuel Salgado; Enrique Roca; Jose Manuel Dominguez;

  • 作者单位

    Group of Sustainable Processes and Products Engineering and Management, Department of Chemical Engineering/School of Engineering, USC, University of Santiago de Compostela, Rua Lope Gomez de Marzoa s, 15782 Santiago de Compostela, Spain;

    Department of Chemical Engineering,University of Vigo (Campus Ourense),As Lagoas s, 32004 Ourense, Spain,Laboratory of Agro-food Biotechnology,CITI-University of Vigo, Tecnopole, Parque Tecnologico de Galicia, San Cibrao das Vifias, Ourense, Spain;

    Group of Sustainable Processes and Products Engineering and Management, Department of Chemical Engineering/School of Engineering, USC, University of Santiago de Compostela, Rua Lope Gomez de Marzoa s, 15782 Santiago de Compostela, Spain;

    Department of Chemical Engineering,University of Vigo (Campus Ourense),As Lagoas s, 32004 Ourense, Spain,Laboratory of Agro-food Biotechnology,CITI-University of Vigo, Tecnopole, Parque Tecnologico de Galicia, San Cibrao das Vifias, Ourense, Spain;

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  • 正文语种 eng
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  • 关键词

    debaryomyces hansenii; kinetic modelling; lactic acid; lactobacillus rhamnosus; logistic model,trimming wastes; xylitol;

    机译：汉森德巴利酵母动力学建模乳酸鼠李糖乳杆菌物流模型;减少浪费;木糖醇;

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