EX-FERM ethanol production in packed bed fermentors: A three cycle operation employing chipped sugarcane

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

doi:10.1007/bf00147561

Cited by 7 publications

(2 citation statements)

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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%