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  • optimized alkaline pretreatment of sludge before anaerobic digestion

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 508
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     naoh was used to disintegrate a mixture composed mainly of primary sludge with biofilm sludge before anaerobic digestion in batch experiments. naoh pretreatment dissolved some organic substances, and the optimum dose was 0.1 mol/l. after the alkali-treated sludge was fed into the digesters, the higher ph delayed the start of digestion and reduced the biogas production during the initial stage, although the system recovered after a lag phase when the dose was lower than 0.04 mol/l. acid conditioning was necessary, but the increased salinity also impacted on the digestion efficiency. for sludge pretreatment, the optimum naoh dose was 0.1 mol/l, and the initial ph of the batch digesters needs to be controlled at less than eight. under optimized conditions, the organic degradation rate was 38.3% and the biogas yield was 0.65 l/g volatile suspended solid (vss), whereas these values for the control were 30.3% and 0.64 l/g vss, respectively.

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