obtenciÓn de dextrano y fructosa, utilizando residuos agroindustriales con la cepa leuconostoc mesenteroides nrrl b512-f

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ID: 191095
2007
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Abstract
Debido al gran potencial biotecnológico que presentan los residuos agroindustriales, se desarrolló el presente trabajo para la obtención de oligosacáridos, utilizando como materia prima residuos de cascaras de naranja, piña y cachaza de caña panelera, a escala de laboratorio. Por medio de un diseño experimental se evaluó la concentración y tipo de sustrato y la temperatura del proceso con tres niveles, para lograr la mayor producción. El desarrollo experimental se llevó a cabo con un volumen de 100 mL y 250 mL. En la etapa final se obtuvo como resultado una producción de 3,4 g/L de dextrano y 5,04 g/L de fructosa, utilizando como sustrato cascaras de naranja con estas condiciones: temperatura de 30 °C y concentración de sustrato de 20 g/L; durante el proceso se midieron el consumo de sustrato y la concentración de biomasa y productos. Se observó el desarrollo del microorganismo con los sustratos empleados en la experimentación, sin adición de nutrientes, con una adaptación favorable a éstos. Finalmente, se realizó una caracterización preliminar del polímero obtenido, con lo que se concluyó que puede obtenerse dextrano de grado técnico para su uso como espesante en la industria de alimentos y en el área de tratamiento de aguas residuales como floculante.
Due to biotechnological potential that presents the agro-industrial remainders, the present work was developed about obtaining oligosaccharides using like raw material remainders of orange peels, pineapple peels, and panelera cane slowness, at level laboratory. An experimental design was used to evaluate type and concentration of substrate and process temperature at three levels, accordingly the greatest amount of dextran and fructose produced. All volumes worked were 100 mL and 250 mL. In the final phase, the result was a production of dextran 3.4 g/L and fructose 5.04 g/L, using orange peels as substrate, temperature at 30 °C and concentration of substrate of 20 g/L, determining for each sample: consumption of substrate, biomass, and amount of products. The growth of the microorganism was observed; correspondingly to a substrate without addition of nutrients with a favorable adaptation at medium supplied. Finally, an experimental characterization was developed, and it was concluded that technical grade dextran can be obtained used in food like thicker and waste water treatment.
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Authors ;Olga Viviana Rodríguez;Henry Hanssen
Journal applied mathematics letters
Year 2007
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