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  • alkaline pretreatment methods followed by acid hydrolysis of saccharum spontaneum for bioethanol production

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 531
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     different alkaline pretreatment methods (naoh, naoh + 10% urea and aqueous ammonia) were optimized for maximum delignification of saccharum spontaneum at 30 °c. maximum delignification were obtained as 47.8%, 51% and 48% from naoh (7% naoh, 48 h, and 10% biomass loading), naoh + urea (7% naoh + 10% urea, 48 h and 10% biomass loading) and 30% ammonia (40 days and 10% biomass loading) respectively. h2so4 60% (v/v), 10% biomass loading at 30 °c for 4 h, were optimized conditions to solubilize the cellulose and hemicellulose from solid residue obtained after different optimized alkaline pretreatments. slurry thus obtained was diluted to obtain final acid concentration of 10% (v/v) for real hydrolysis of cellulose and hemicellulose at 100 °c for 1 h. among all pretreatment methods applied, the best result 0.58 g (85%) reducing sugars/g of initial biomass after acid hydrolysis was obtained from aqueous ammonia pretreated biomass. scheffersomyces stipitis cbs6054 was used to ferment the hydrolysate; ethanol yield (yp/s) and productivity (rp) were found to be 0.35 g/g and 0.22 g/l/h respectively.

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