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  • anaerobic co-digestion of excess brewery yeast in a granular biomass reactor to enhance the production of biomethane

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 656
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the anaerobic co-digestion of brewery yeast using granular biomass was studied on the lab, pilot and full-scale. the study shows no adverse effects in the co-digestion of yeast and wastewater in concentrations up to 1.1 (v/v)%. in concentrations up to 2.3% the process is manageable; however, not advisable. in concentrations over 2.8% the process exhibits failure due to the overload with suspended solids. an average specific biogas production of 0.560 m3 kg−1 of volatile solids was achieved. full-scale operation with 0.7% yeast concentration showed a 38.5% increase in the biogas production and a 26.2% increase in the organic loading rate, which resulted in an increase of the biomethane/natural-gas substitute ratio from 10% to 16%. the influence of the yeast addition on the structure of the microbial biomass showed up to 7% dissimilarity in the archaeal and a 32% dissimilarity in the bacterial biomass community, which did not present any difficulties.

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