Balanços de massa na indústria sucroalcooleira

Abstract

They were conducted sectoral mass balance in a hypothetical sugar and ethanol industry. It was considered an industry that processes ten thousand tons of cane per day and intended broth extracted into equal parts for the manufacture of sugar and anhydrous ethanol. In the plant, the calculations mass balances were performed on the steps of receiving and preparation of cane, milling, sulfitation, decantation, filtration, evaporation and crystallization. The distillery, the steps considered were settling and filtering the broth, preparation of the wort, fermentation, centrifugation and distillation. The data required for the purposes of the calculation, as the results of laboratory analysis and process parameters, were taken from the literature. As a final result the mass balance, the quantities of sugar and ethanol predicted by calculations were, respectively, 114.72 kilograms per ton of cane and 83.97 liters per ton of sugarcane. The average productivity of the sugarcane industry in Brazil is 138 kg of sugar per ton of cane and 85 liters of ethanol per ton of cane (MAPA, 2009). The proximity between the results predicted by calculations and obtained by industries support the methodology adopted in this work.