食品加工与技术杂志

抽象的

Integration of a Sugarmill, An Ethanol Distillery and a Single Cell Protein Plant Energetically

Oscar Almazán Del Olmo*, Indira Pérez Bermúdez

This paper reported an analysis for an energy integration of a Sugar Mill of a milling capacity of 6900 t/d of cane, an alcohol distillery of 500 Hl/d and a Single Cell Protein plant of 10 t/d is performed becoming a Biorefinery complex. All based on an option in which sugar mill supplies steam and electricity to satisfy needs of each plant  during season and  ensuring at this time enough surplus bagasse and straw, to cogenerate and satisfy steam and electricity demands of annexed plants in off season period. This way it was proven that a sugar mill could satisfy energy demands of these plants and also deliver 6,85 MW-h to national grid during milling season. In addition, 1054 t/d of surplus bagasse was obtained, that together with collected straw from cane harvesting, guaranty complex energy demand, for operating 100 days in off season,at designed production levels of all installations and delivering a surplus of 14,18 MW-h to national grid. With energy integration, Sugar Mill-Distillery-Single Cell Protein (SCP) plant production costs are reduced, because of saving energy consumption, in addition of eliminating all related emissions and environment impacts. A total cost saving gets US $ 3,065,385.00 CUC at harvest season. In addition to this an additional income to milling enterprise is added by selling electric energy to national grid  (price to be determined by contract).