ETHANOL PRODUCTION PROCESS BY CONTINUOUS FERMENTATION FROM YEAST CELLS (SCHEFFERSOMYCES STIPITIS) IMMOBILIZED IN PRETREATED CANE BAGASSE

The present disclosure is related to an ethanol production method using immobilized Scheffersomyces stipitis yeast in a non-conventional media (sugar cane bagasse), which is pretreated for packaging and activation in a glass column with a double jacket for temperature control. The complex medium tha...

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Hauptverfasser: Benigno ORTIZ MUÑIZ, María Guadalupe AGUILAR USCANGA, Beatriz GUTIÉRREZ RIVERA
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creator Benigno ORTIZ MUÑIZ
María Guadalupe AGUILAR USCANGA
Beatriz GUTIÉRREZ RIVERA
description The present disclosure is related to an ethanol production method using immobilized Scheffersomyces stipitis yeast in a non-conventional media (sugar cane bagasse), which is pretreated for packaging and activation in a glass column with a double jacket for temperature control. The complex medium that is used (HBC), is conditioned with salts, yeast extract and intermediate B honey to improve the efficiency of the ethanol production process. By comparing this method with a free cell system, half of the total glucose consumption time is reduced in a synthetic medium. In general, for the different culture media used (synthetic medium, intermediate B honey and HBC) a greater conversion of sugar is observed in the system with immobilized cells, regarding the conventional free cells system. For the fermentation with intermediate B honey using the immobilized yeast, the highest production of ethanol was reached after 60 hours (29 gL-1); and using free cells, the ethanol concentration after 60 hours of fermentation was smaller (10 gL-1). Therefore, it is considered that the evaluated immobilization system is relevant for ethanol production systems from renewable waste (second generation biofuels), from which complex culture media is obtained. Esta invención hace referencia a un método de producción de etanol, utilizando una levadura de Scheffersomyces stipitisinmovilizada enun soporte no convencional (bagazo de caña de azúcar), que es pretratado para su empaquetado y activación en una columna de vidrio con doble chaqueta para el control de temperatura. El medio complejo que es utilizado (HBC), es acondicionado con sales, extracto de levadura y miel intermedia"B", que mejoran la eficiencia del proceso de producción de etanol. Al comparar este método con un sistema de células libres, se reduce a la mitad el tiempo de consumo total de la glucosa en un medio sintético. En general, para los diferentes medios de cultivo utilizados (medio sintético, miel intermedia "B" e HBC), se observó una mayor conversión de azúcares en el sistema con células inmovilizadas con respecto al sistema convencional con células libres. Para la fermentación con miel intermedia "B" utilizando la levadura inmovilizada, se alcanzó a las 60 horas la mayor producción de etanol (29 gL-1), y utilizando células libres la concentración de etanol a las 60 horas de fermentación fue menor (10 gL-1). Por lo anterior, consideramos que el sistema de inmovilización evaluado es pertinente para sistemas de prod
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Esta invención hace referencia a un método de producción de etanol, utilizando una levadura de Scheffersomyces stipitisinmovilizada enun soporte no convencional (bagazo de caña de azúcar), que es pretratado para su empaquetado y activación en una columna de vidrio con doble chaqueta para el control de temperatura. El medio complejo que es utilizado (HBC), es acondicionado con sales, extracto de levadura y miel intermedia"B", que mejoran la eficiencia del proceso de producción de etanol. Al comparar este método con un sistema de células libres, se reduce a la mitad el tiempo de consumo total de la glucosa en un medio sintético. En general, para los diferentes medios de cultivo utilizados (medio sintético, miel intermedia "B" e HBC), se observó una mayor conversión de azúcares en el sistema con células inmovilizadas con respecto al sistema convencional con células libres. 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The complex medium that is used (HBC), is conditioned with salts, yeast extract and intermediate B honey to improve the efficiency of the ethanol production process. By comparing this method with a free cell system, half of the total glucose consumption time is reduced in a synthetic medium. In general, for the different culture media used (synthetic medium, intermediate B honey and HBC) a greater conversion of sugar is observed in the system with immobilized cells, regarding the conventional free cells system. For the fermentation with intermediate B honey using the immobilized yeast, the highest production of ethanol was reached after 60 hours (29 gL-1); and using free cells, the ethanol concentration after 60 hours of fermentation was smaller (10 gL-1). Therefore, it is considered that the evaluated immobilization system is relevant for ethanol production systems from renewable waste (second generation biofuels), from which complex culture media is obtained. Esta invención hace referencia a un método de producción de etanol, utilizando una levadura de Scheffersomyces stipitisinmovilizada enun soporte no convencional (bagazo de caña de azúcar), que es pretratado para su empaquetado y activación en una columna de vidrio con doble chaqueta para el control de temperatura. El medio complejo que es utilizado (HBC), es acondicionado con sales, extracto de levadura y miel intermedia"B", que mejoran la eficiencia del proceso de producción de etanol. Al comparar este método con un sistema de células libres, se reduce a la mitad el tiempo de consumo total de la glucosa en un medio sintético. En general, para los diferentes medios de cultivo utilizados (medio sintético, miel intermedia "B" e HBC), se observó una mayor conversión de azúcares en el sistema con células inmovilizadas con respecto al sistema convencional con células libres. Para la fermentación con miel intermedia "B" utilizando la levadura inmovilizada, se alcanzó a las 60 horas la mayor producción de etanol (29 gL-1), y utilizando células libres la concentración de etanol a las 60 horas de fermentación fue menor (10 gL-1). Por lo anterior, consideramos que el sistema de inmovilización evaluado es pertinente para sistemas de producción de etanol a partir de residuos renovables (biocombustibles de segunda generación), de los que se obtienen medios de cultivo complejos.</abstract><oa>free_for_read</oa></addata></record>
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subjects BEER
BIOCHEMISTRY
CHEMISTRY
COMPOSITIONS THEREOF
CULTURE MEDIA
ENZYMOLOGY
FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE
METALLURGY
MICROBIOLOGY
MICROORGANISMS OR ENZYMES
MUTATION OR GENETIC ENGINEERING
PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS
SPIRITS
VINEGAR
WINE
title ETHANOL PRODUCTION PROCESS BY CONTINUOUS FERMENTATION FROM YEAST CELLS (SCHEFFERSOMYCES STIPITIS) IMMOBILIZED IN PRETREATED CANE BAGASSE
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