EX-FERM ethanol production using chipped sugarcane in packed bed fermenters

Cabrera, S. de; Arriola, M. C. de; Morales, Eduardo Marin; Micheo, F. de; Rolz, C.

doi:10.1007/bf00507999

Cited by 18 publications

(4 citation statements)

References 18 publications

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“…Before using a slant culture macro and microscopic checking procedures were carried out to ensure lack of contaminants. Inoculum preparation was done following the techniques described previously (de Cabrera et al, 1981(de Cabrera et al, , 1982a(de Cabrera et al, , 1982b. The two yeast strains behaved statisticallv similar in terms of suear consum~tion.…”

Section: Microorganismsmentioning

confidence: 99%

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Effects of Sugarcane Chip Sizes on Their Conversion to Ethanol Using the Ex-Ferm Process

Rolz

Cabrera

Arriola

1986

Chemical Engineering Communications

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The sugar concentrations in the bulk of the solution, in the pressed juice and in the residual solid and the ethanol concentration in the bulk of the solution and the pressed juice were obtained for two S. cerevisiae strains and three fresh sugarcane particle size in a static EX-FERM process at 3YC. The data show that cane particle size affects the sugar concentration in the bulk of the solution decreasing the extraction rates as the size increased. As a direct consequence the maximum amount of sugar in the bulk of the solution was higher for the smaller particle size. Yeast presumably physically interacted with the cane particles penetrating and adsorbing on the solid, so that there was also an in situ sucrose conversion within the solid matrix. Ethanol concentration within the solids was higher than in the bulk of the solution specially in the first hours of the fermentation due to this effect. Chip size had a strong effect on batch time required to reduce sugar concentration within the cane solid matrix. The time for the smaller chip size was about 60% of the one for the larger particles.

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Section: Microorganismsmentioning

confidence: 99%

“…The EX-FERM process was developed at ICAITI as a simultaneous extraction and fermentation of the sugars in sugarcane chips (Rolz et al, 1979(Rolz et al, , 1983de Cabrera et al, 1981de Cabrera et al, , 1982ade Cabrera et al, , 1982b. This concept has also been tested in other countries.…”

Section: Introductionmentioning

confidence: 97%

Effects of Sugarcane Chip Sizes on Their Conversion to Ethanol Using the Ex-Ferm Process

Rolz

Cabrera

Arriola

1986

Chemical Engineering Communications

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“…This bioprocess can be carried out in a bioreactor system which combines tubular bioreactor with stirred tank bioreactor (6). Packed bed tubular bioreactors are a good alternative for semi-solid bioprocess as ethanol production from sugar beet cossettes (7). Mario For simulations of flow and microbial conversion reactions, related to modeling of simultaneous extraction and fermentation process in a single sugar beet cossette a software package OpenFOAM was used.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamic (CFD) modeling of simultaneous extraction and fermentation process in a single sugar beet cossette

Novák

Trontel

Slavica

et al. 2017

The EuroBiotech Journal

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For simulations of flow and microbial conversion reactions, related to modeling of simultaneous extraction and fermentation process in a single sugar beet cossette a software package OpenFOAM was used. The mass transfer of the components (sucrose, glucose, fructose and ethanol) in the studied system was controlled by the convection and diffusion processes. Microbial conversion rates and yield coefficients were experimentally determined and/or estimated by mathematical simulation. Dimensions of the model sugar beet cossette (SBC) were: average length of cosettes 40.10 mm, average thickness 3.32 mm and average width 3.5 mm, and represented in the model as a square-shape cross-section mathematical simulation. Dimensions of the model sugar beet cossette (SBC) were: average length of cosettes 40.10 mm, average thickness 3.32 mm and average width 3.5 mm, and represented in the model as a square-shape cross-section used to study the mass transfer and microbial conversion rates on the scale of single sugar beet cossette in the short time scales (up to 25 s). This model can be used for simulation of extractant flow around single sugar beet cossette as well as for description of simultaneous extraction and fermentation process in the studied system.

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“…Eng. 1983, 83-3064); (ii) using a Tilby separator to remove pith from 10to 20-cm stalk billets and fermenting juice pressed from the pith (12,13,19,23); and (iii) using the EX-FERM process, in which sugar from small chips is extracted and fermented simultaneously in an aqueous solution (2,(17)(18)(19)(20).…”

mentioning

confidence: 99%

Intermediate-Scale, Semicontinuous Solid-Phase Fermentation Process for Production of Fuel Ethanol from Sweet Sorghum

Gibbons

Westby

Dobbs

1986

Appl Environ Microbiol

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A novel, semicontinuous solid-phase fermentation system was used to produce fuel ethanol from sweet sorghum. The process was at an intermediate scale. In the process, dried and shredded sweet sorghum was rehydrated to 70% moisture, acidified to pH 2.0 to 3.0, and either pasteurized (12 h at 70 to 80°C) or not pasteurized before spray inoculation with a broth culture of Saccharomyces cerevisiae. Fermented pulp exited the semicontinuous fermentor after a retention time of 72 h and contained approximately 6% (vol/vol) ethanol. Ethanol yields from dry sweet sorghum were 176 to 179 liters/10 3 kg (85% of theoretical). Production costs for a greatly scaled-up (×1,400) conceptual version of this system were projected by calculation to average $0.47/liter for 95% ethanol. The calculated energy balance (energy output/energy input ratio) was estimated to be 1.05 when pasteurization was included and 1.31 when pasteurization was omitted. In calculating the energy balances, the output energy of the protein feed byproduct and the input energy for growing the sweet sorghum were not considered. A design for the scaled-up plant (farm scale) is provided.

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EX-FERM ethanol production using chipped sugarcane in packed bed fermenters

Cited by 18 publications

References 18 publications

Effects of Sugarcane Chip Sizes on Their Conversion to Ethanol Using the Ex-Ferm Process

Effects of Sugarcane Chip Sizes on Their Conversion to Ethanol Using the Ex-Ferm Process

Computational fluid dynamic (CFD) modeling of simultaneous extraction and fermentation process in a single sugar beet cossette

Intermediate-Scale, Semicontinuous Solid-Phase Fermentation Process for Production of Fuel Ethanol from Sweet Sorghum

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