RESUMO
Abstract Very high gravity (VHG) technology was employed on industrial scale to produce ethanol from molasses (fermented) as well as by-products formation estimation. The effect of different Brix° (32, 36 and 40) air-flow rates (0.00, 0.20, 0.40, and 0.60 vvm) was studied on ethanol production. The maximum ethanol production was recorded to be 12.2% (v/v) at 40 Brix° with 0.2 vvm air-flow rate. At optimum level aeration and 40 Brix° VHG, the residual sugar level was recorded in the range of 12.5-18.5 g/L, whereas the viable cell count remained constant up to 50 h of fermentation and dry matter production increased with fermentation time. Both water and steam consumption reduced significantly under optimum conditions of Brix° and aeration rate with compromising the ethanol production. Results revealed VHG with continuous air flow is viable technique to reduce the ethanol production cost form molasses at commercial scale.
Assuntos
Embrião de Galinha , Etanol/metabolismo , Microbiologia Industrial/métodos , Melaço/microbiologia , Saccharomyces cerevisiae/metabolismo , Fermentação , Hipergravidade , Microbiologia Industrial/instrumentação , Melaço/análise , Melaço/economia , Saccharomyces cerevisiae/genéticaRESUMO
Como una posible solución al problema de la producción de carne y leche, y para disminuir la pérdida de peso del ganado bovino durante al temporada de sequía en el trópico, se ofrece el proceso tecnológico de solidificación de la melaza en forma de bloques como complemento nutricional, elaborados en base de melaza y de algunos subproductos agroindustriales como cáscara de cítricos, grano seco de cervecería, soapstock, harina de sangre, entre otros, de valioso potencial alimenticio que se encuentran en abundancia en las regiones tropicales de nuestro país