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  • optimization of biohydrogen and methane recovery within a cassava ethanol wastewater/waste integrated management system

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 596
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     thermophilic co-fermentation of cassava stillage (cs) and cassava excess sludge (ces) were investigated for hydrogen and methane production. the highest hydrogen yield (37.1 ml/g-total-vs added) was obtained at vscs/vsces of 7:1, 17% higher than that with cs digestion alone. the ces recycle enhanced the substrate utilization and improved the buffer capacity. further increase the ces fraction led to changed vfa distribution and more hydrogen consumption. fish analysis revealed that both hydrogen producing bacteria and hydrogen consuming bacteria were enriched after ces recycled, and the acetobacteria percentage increased to 12.4% at vscs/vsces of 6:2. relatively high efficient and stable hydrogen production was observed at vscs/vsces of 5:3 without ph adjusted and any pretreatment. the highest total energy yield, the highest cod and vs degradation were obtained at vscs/vsces of 7:1. gfc analysis indicated that the hydrolysis behavior was significantly improved by ces recycle at both hydrogen and methane production phase.

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