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Resumen: El objetivo de este trabajo fue el de determinar la influencia del tamano del reactor en el crecimiento del hongo 2191 sobre rastrojo de maiz. Para esto se trabajo con tres tamanos de reactor, fundas de polietileno transparente con cargas de 0.25 kg (pequeno), 1.25 kg (mediano) y 2.5 kg (grande). Se encontro que los hongos crecen con mayor velocidad en los reactores pequenos, el tiempo necesario hasta el segundo brote es de 46 d, 51 para el mediano 60 para el grande. No obstante los tiempos de trabajo por parada son mayores para la funda pequena; ademas los cuerpos fructiferos producidos por el reactor de 0.25 kg son pequenos y con poco valor comercial, a diferencia de los otros que son grandes y de buen valor comercial. Se llego a encontrar que la funda mediana 1.25 kg es la que presenta el mejor tamano como reactor para obtener cuerpos fructiferos adecuados y un buen rendimiento biologico (54.4 %). Abstract: The aim of this study was to determine the influence of the bioreactor size in the growth kinetics of the fungi Pleurotus ostreatus using corn Stover as a substrate. Polyethylene sleeves were used as bioreactors in three sizes: 0.25 kg of substrate (small size reactor); 1.25 kg (medium size reactor), and 2.5 kg (large reactor). It was found that the edible mushroom grew faster when small size reactors were used. The second harvest was at 46 d for small reactor, 51 d for medium size reactor, and 60 d for large size reactor. However, time needed to prepared each batch is longer than other reactors; additionally, mushrooms did not have a commercially shape, these were very small and not uniform in shape. Taking into considerations, the commercial value of the, use a medium size reactor seems to be the best choice to have good biological yield and uniform shape of the mushroom.

Estudio de la influencia del tamaño del reactor en el crecimiento del hongo Pleurotus ostreatus 2191 sobre rastrojo de maíz