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Generalized kinetics of ethanol fermentation and ethanol production in a calcium-alginate plate reactor.

机译：海藻酸钙平板反应器中乙醇发酵和乙醇生产的一般动力学。

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摘要

Ethanol from renewable sources has great potential for the alternatives of fossil fuels and commodity chemicals. Increasing the efficiency of ethanol fermentation processes and using low cost and stable feedstocks can make fermentation ethanol competitive with synthetic ethanol on a cost basis. The goals of this research were to investigate a fermentation system capable of handling of a particulate material and to develop a universal mathematical model for ethanol fermentation.;An immobilized cell reactor system was developed for continuous ethanol fermentation of a feedstock containing small particulate matter. Polyester fiber cloth coated with a mixture of Ca-alginate and yeast cells was used for immobilized cell support. The cloth plates were inserted vertically in the reactor to prevent blocking the flow path of particulates in the feedstock.;Immobilized cell density in the Ca-alginate gel coated polyester fabric was investigated, and ethanol productivities were studied for different fermentation conditions. Average immobilized cell loading of 0.006 g/cm;Using data for ethanol fermentation reported in the literature, a kinetic model for ethanol fermentation was developed. The model fit the literature data better than other models which have been suggested.;Using the new mathematical model, computer simulations were performed for fermentations using various feed glucose concentrations and various dilution rates with 10 plates in the reactor. The simulation followed experimental data during both steady and transient states.;The characteristics of batch fermentation in the new plate reactor were investigated using both a synthetic glucose medium and the liquid fraction of screened sorghum mashes having different particle size distributions. As the particle size of the feedstock increased, the ethanol fermentation rate decreased. Using the liquid fraction screened through 0.5 mm openings, continuous fermentation was carried out. The new immobilized plate reactor successfully fermented this feedstock.
机译：来自可再生资源的乙醇在替代化石燃料和日用化学品方面具有巨大潜力。提高乙醇发酵工艺的效率并使用低成本和稳定的原料可以使发酵乙醇在成本基础上与合成乙醇竞争。这项研究的目的是研究一种能够处理颗粒物质的发酵系统，并开发一种用于乙醇发酵的通用数学模型。研制了一种固定化细胞反应器系统，用于对含有小颗粒物质的原料进行连续的乙醇发酵。涂覆有藻酸钙和酵母细胞的混合物的聚酯纤维布用于固定的细胞载体。将布板垂直插入反应器中，以防止阻塞进料中颗粒的流动路径。研究了钙-海藻酸钠凝胶涂覆的聚酯织物中固定化的细胞密度，并研究了不同发酵条件下的乙醇生产率。平均固定细胞负荷为0.006 g / cm;使用文献中报道的乙醇发酵数据，建立了乙醇发酵动力学模型。该模型比文献中提出的其他模型更适合文献数据。使用新的数学模型，使用各种进料葡萄糖浓度和各种稀释率在反应器中放置10个平板，对发酵进行了计算机模拟。在稳态和瞬时状态下，模拟都是根据实验数据进行的。;使用合成葡萄糖培养基和不同粒度分布的筛选过的高粱的液体部分，研究了新型平板反应器中间歇发酵的特性。随着原料的粒度增加，乙醇发酵速率降低。使用通过0.5mm开口筛分的液体部分，进行连续发酵。新的固定式平板反应器成功地发酵了这种原料。

著录项

  • 作者

    Sung, Minki.;

  • 作者单位

    Texas A&M University.;

  • 授予单位 Texas A&M University.;
  • 学科 Developmental biology.;Mental health.
  • 学位 Ph.D.
  • 年度 1989
  • 页码 158 p.
  • 总页数 158
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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