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  • stable operation during pilot-scale anaerobic digestion of nutrient-supplemented maize/sugar beet silage

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 503
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     biogas production from maize/sugar beet silage was studied under mesophilic conditions in a continuous stirred tank reactor pilot-scale process. while energy crop mono-digestion is often performed with very long hydraulic retention times (hrts), the present study demonstrated an efficient process operating with a 50-day hrt and a corrected total solids (tscorr) based organic loading rate of 3.4 kg/m3 d. the good performance was attributed to supplementation with both macro- and micronutrients and was evidenced by good methane yields (318 m3/ton tscorr), which were comparable to laboratory maximum expected yields, plus low total volatile fatty acid concentrations (<0.8 g/l). a viscoplastic and thixotropic digester fluid behaviour was observed, and the viscosity problems common in crop mono-digestion were not seen in this study. the effluent also complied with swedish certification standards for bio-fertilizer for farmland application. nutrient addition thus rendered a stable biogas process, while the effluent was a good quality bio-fertilizer.

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