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  • scaling up of ethanol production from sugar molasses using yeast immobilized with alginate-based mcm-41 mesoporous zeolite composite carrier

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 597
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     microporous and mesoporous zeolites, including zsm-5, h-β, h-y, and mcm-41, were modified with 3-aminopropyl-triethoxysilane (aptes), then inorganic fillers, such as abovementioned zeolites or mesoporous materials, (α-alooh or γ-al2o3), were mixed with alginate embedded with yeast; and finally these carriers were cross-linked through the double oxirane. the alginate-based immobilized yeast with mcm-41 exhibited much shorter fermentation time and higher ethanol concentration than pure alginate and other composite carriers with the highest cell concentration of 4.8 × 109 cells/ml. the composite carrier maintains the highest ethanol productivity of 6.55 g/l/h for 60 days in continuous fermentation process, implying good operational durability for commercial applications. the reason for the higher bio-catalytical function of the immobilized yeast might lay in the uniformly yeast distribution in the bio-reactor and high yeast cell concentration, which contributed by the improved transmission of fermentation media and combined effects of yeast adsorption by mcm-41 and embedment by alginate.

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