کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5148559 | 1497372 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancement of hydrogen and methane production from co-digestion of palm oil decanter cake and crude glycerol using two stage thermophilic and mesophilic fermentation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Two-stage thermophilic hydrogen fermentation and mesophilic methanogenic process for methane production with hydrogenic effluent from co-digestion of decanter cake (DC) and crude glycerol (GLC) was investigated. For the single stage, hydrogen reactor with 2% wvâ1 total solid (TS) of DC and crude glycerol was operated at 4 days hydraulic retention time (HRT) with varying glycerol loading of 0.75-1.5% GLC while methane reactor with 2% wvâ1 total solid (TS) of DC was operated at 13 days HRT. The maximum hydrogen production rate and hydrogen yield in the single stage obtained from the 1.5% GLC co-digestion condition were 461Â mL H2 Lâ1Â dâ1 and 23Â L H2Â kgâ1 TSadded, respectively. Crude glycerol was found to be an alternative pH-adjust substance in hydrogen reactor. At the condition of 0.75% GLC co-digestion, the pH was maintained in the range higher than 5.3 throughout the fermentation process. Semi-continuous methane production with 0.75% GLC hydrogenic effluent achieved the maximum methane production rate and methane yield about 736Â mL CH4 Lâ1Â dâ1 and 44Â L CH4Â kgâ1 TSadded compared with the single stage with 2% TSDC and the second stage with 1% GLC hydrogenic effluent. Total energy recovery from two-stage fermentation about 0.056Â kWh kgâ1 TSadded was achieved from the condition of 0.75% GLC hydrogenic effluent condition. It was improved by 6.2 and 1.6 times compared to the single stage in both hydrogen and methane reactor, respectively. This work demonstrated the practical enhancement of energy recovery and the efficiency of waste utilization by two-stage fermentation for hydrogen and methane production from decanter cake and crude glycerol.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 5, 2 February 2017, Pages 3440-3446
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 5, 2 February 2017, Pages 3440-3446
نویسندگان
Suwimon Kanchanasuta, Omjit Sillaparassamee,