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COMPUTER-AIDED PROCESS AND ECONOMIC ANALYSIS OF INTEGRATED MICROBIAL PROCESSES FOR FIBER,FEED AND FERTILIZER PRODUCTION FROM SISAL BIOMASS RESIDUES. P.V.PANNIRSELVAM, F.C.G.SOUZA, W.S.NOVAES, E.M.PAIVA Department of Chemical
Engineering, UFRN, Natal/RN BRAZIL, Biomass residues from sisal are not yet well utilized as they are very resistant for microbial conversion due to its highly complex polymeric lignocellulosic solid structure. Two technology were developed; the first based on physical pretreatment, anaerobic fermentation and separation of the gas, organic liquid fertilizer and solid feed , and the second the micro algae Spurilina production in high rate photo bioreactor.Later a third technology were included to cogenerate thermal and electrical energy need for sustainable operation of the system with bio energy .The integration of these system are analyzed in this work from the process design and economic evaluation view point.The objective of this work is to elucidate the technical complexity and high cost associated with integrated total biomass waste utilization project from sisal fiber production in Brazil using cogeneration energy technology .A case study was carried out for sustained production of fuel, feed and fertilizer from sisal residues wastes that require large scale equipments and presents problems related with the bioprocess modeling,mass and energy balance studies, equipment sizing ,process optimization and scale up challenges.Based on the analysis of the case study number of conclusions are drawn regarding cost break down and economical viability of the system simulated for industrial scale production of fibers.This analysis was performed using software tool for computer aided bioprocess design called Superpro Design to make economic analysis of making fibers from sisal. The results obtained show the economic parameters and the cost benefit of the cogeneration project associated with drying of sisal fiber produced in Brazil.
Key words: Biomass wastes ,process design,economic evaluation. |
