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  • chemical and enzymatic sequential pretreatment of oat straw for methane production

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 695
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     oat straw was subjected to sequential pretreatment: acid/alkaline/enzymatic, to convert the lignocellulosic material in soluble sugars. the hydrolysates from acid pretreatment (2% hcl, 90 °c) and enzymatic pretreatment (cellulase, ph 4.5, 45 °c) were used as substrates in two lab-scale uasb reactors for methane production. the acid and enzymatic hydrolysates contained 25.6 and 35.3 g/l of total sugars, respectively, which corresponded to a cod of 23.6 and 30.5 g/l, respectively. the uasb reactor fed with acid hydrolysate achieved a maximum methane yield of 0.34 l ch4/g cod at an organic loading rate (olr) of 2.5 g cod/l-d. in the reactor fed with enzymatic hydrolysate the methane yield was 0.36 lch4/g cod at olr higher than 8.8 g cod/l-d. the anaerobic digestion of both hydrolysates was feasible without the need of a detoxification step. the sequential pretreatment of oat straw allowed to solubilize 96.8% of hemicellulose, 77.2% of cellulose and 42.2% of lignin.

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