Determination of the percentage of ethanol produced by <i>Saccharomyces cerevisiae</i> from semi-purified glycerin

Díaz, Cecilia; Sierra, Yohanina; Hernández, Jenny Alexandra

doi:10.1088/1742-6596/1126/1/012008

Cited by 1 publication

(1 citation statement)

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“…The ethanol production by S. cerevisiae atcc 9763 was obtained between 16 and 24 h; the production of ethanol estimate by the model was 15 to 18 g/L with hydrolysates of acid treatment; however, the theoretical yield was 78 to 92 % by Saccharomyces cerevisiae. At an experimental and industrial level, only between 87-95 of the theoretical yield of ethanol is reached in the fermentation [31].…”

Section: Resultsmentioning

confidence: 99%

Hydrolysis of Red Beet Bagasse and Modeling of Hydrolysates for Bioethanol Production

Jiménez-Islas

Ríos-Rivera

Sánchez

et al. 2021

Cien.Ing.Neogranadina

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Red beets in Mexico are used in the colorants industry, but their juice bagasse (RBB) can be carbohydrates for ethanol production. The present study aims to the pretreatment of bagasse of red beet using acid (H2SO4) and alkali (NaOH) to improve the availability of sugars. Also, describe quantitatively in the hydrolysates the microbial growth, substrate consumption, and ethanol production with simulation using data kinetics of red beet and logistic, Pirt, and Luedeking-Piret equations. Experiments with H2SO4 at sterilization conditions resulted in lower phenolic formation and increased hydrolysis to 32 %. Logistic, Pirt, and Luedeking-Piret equations were used to quantitatively describe the hydrolysates the microbial growth, substrate consumption, and ethanol production, respectively. In the alkali treatment, a significant mean difference was found (p < 0.05) in substrate mass and reaction time. The maximum yield of 38 g/L of total sugars at 72 h of reaction was obtained from 6 g RBB and H2SO4 at 0.5 N. The ethanol yield was 15 to 18 g/L representing about 78 to 92 % of the theoretical yield.

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Section: Resultsmentioning

confidence: 99%