Ethanol Production by a Flocculant Yeast Strain in a CSTR Type Fermentor with Cell Recycling

Hojo, Ossamu; Hokka, Carlos O.; Maior, Ana Maria Souto

doi:10.1007/978-1-4612-1604-9_48

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…Four industrial K. marxianus strains isolated from ''cocoa'' fermentations (Brazil) -CH2-2, CH9-1, CH8-1 and CH1-1 (Pereira et al, 1999). The set of S. cerevisiae laboratory strains (routinely used in research laboratory) included CEN.PK 113-7D (Pereira et al, 2010), NRRL Y-265 (Hojo et al, 1999) and an adapted laboratory strain of the flocculating yeast NRRL Y-265-ADAPT (Landaeta et al, 2013). For comparative propose, the K. marxianus CBS 6556 laboratory background strain was also included (Ribeiro et al, 2007).…”

Section: Yeastsmentioning

confidence: 99%

“…17.6 ± 0.4 41.1 ± 0.1 0.25 ± 0.00 83 ± 1 CA1187 0.0 ± 0.0 50.9 ± 2.0 0.49 ± 0.02 87 ± 3 CA1185 0.0 ± 0.0 51.3 ± 0.4 0.53 ± 0.00 88 ± 1 1762 BELG Portuguese beer plant 104.0 ± 1.7 0.9 ± 0.1 0.01 ± 0.00 18 ± 1 CEN.PK 113-7D Pereira et al (2010) 86.8 ± 6.9 0.7 ± 0.1 0.00 ± 0.00 5 ± 0 NRRL Y-265 Hojo et al (1999) 103.9 ± 0.4 2.0 ± 0.6 0.01 ± 0.00 39 ± 9 NRRL Y-265 ADAPT Landaeta et al (2013) 107.7 ± 0.6 0.9 ± 0.1 0.01 ± 0.00 28 ± 1…”

Section: Strainmentioning

confidence: 99%

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Industrial robust yeast isolates with great potential for fermentation of lignocellulosic biomass

Pereira

Romaní

Ruiz

et al. 2014

Bioresource Technology

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The search of robust microorganisms is essential to design sustainable processes of second generation bioethanol. Yeast strains isolated from industrial environments are generally recognised to present an increased stress tolerance but no specific information is available on their tolerance towards inhibitors that come from the pretreatment of lignocellulosic materials. In this work, a strategy for the selection of different yeasts using hydrothermal hydrolysate from Eucalyptus globulus wood, containing different concentrations of inhibitors, was developed. Ten Saccharomyces cerevisiae and four Kluyveromyces marxianus strains isolated from industrial environments and four laboratory background strains were evaluated. Interestingly, a correlation between final ethanol titer and percentage of furfural detoxification was observed. The results presented here highlight industrial distillery environments as a remarkable source of efficient yeast strains for lignocellulosic fermentation processes. Selected strains were able to resourcefully degrade furfural and HMF inhibitors, producing 0.8g ethanol/Lh corresponding to 94% of the theoretical yield.

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Section: Yeastsmentioning

confidence: 99%

Section: Strainmentioning

confidence: 99%

Industrial robust yeast isolates with great potential for fermentation of lignocellulosic biomass

Pereira

Romaní

Ruiz

et al. 2014

Bioresource Technology

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“…Continuous fermentation can increase productivity; however, it is not conducive to high cell-density culture, resulting in a low ethanol concentration and a significant loss of residual substrate. To increase the efficiency of the ethanol fermentation process, various cell culture methods have been investigated. − From a biotechnological perspective, metabolic reaction models of microbes are combined with optimization methods , in order to support microbiologists in the biotechnological improvement of microorganisms with industrial applications. From a bioprocess engineering perspective, fermentation processes with cell recycling units − have attracted considerable interest in recent years for their potential to achieve greater product concentrations and maximize productivity.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Optimization of Continuous Fermentations with Cell Recycling for Ethanol Production

Wang

Lin

2010

Ind. Eng. Chem. Res.

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In this study, we considered a bioprocess optimization problem for continuous ethanol fermentation with cell recycling. The aim of the optimization problem was to obtain the maximum overall productivity and conversion subject to the interval inequality constraints for residual glucose concentration and the total amount of glucose supplied. The residual glucose not only leads to a loss of revenue but also can create environmental problems, such that employing both constraints has benefits for both operating costs and environmental impact. A fuzzy goal attainment method was introduced to the multiobjective problem in order to obtain a trade-off solution. From the computational results, the overall productivity of the continuous fermentation process with cell recycling allowed for a higher dilution rate, such that the overall productivity was about 7.3-fold higher than that of a continuous mixed-flow fermentation process.

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Ethanol Production by a Flocculant Yeast Strain in a CSTR Type Fermentor with Cell Recycling

Cited by 2 publications

References 7 publications

Industrial robust yeast isolates with great potential for fermentation of lignocellulosic biomass

Industrial robust yeast isolates with great potential for fermentation of lignocellulosic biomass

Fuzzy Optimization of Continuous Fermentations with Cell Recycling for Ethanol Production

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