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• W2052566715 abstract "► The dark fermentation process of food wastes was studied over an extended period. ► Decreasing the HRT of the process negatively affected the specific gas production. ► Adsorption of CO 2 was successfully attained using a biomass type activated carbon. ► H 2 concentration in the range of 85–95% was obtained for the treated gas-stream. The production of H 2 by biological means, although still far from being a commercially viable proposition, offers great promise for the future. Purification of the biogas obtained may lead to the production of highly concentrated H 2 streams appropriate for industrial application. This research work evaluates the dark fermentation of food wastes and assesses the possibility of adsorbing CO 2 from the gas stream by means of a low cost biomass-based adsorbent. The reactor used was a completely stirred tank reactor run at different hydraulic retention times (HRTs) while the concentration of solids of the feeding stream was kept constant. The results obtained demonstrate that the H 2 yields from the fermentation of food wastes were affected by modifications in the hydraulic retention time (HRT) due to incomplete hydrolysis. The decrease in the duration of fermentation had a negative effect on the conversion of the substrate into soluble products. This resulted in a lower amount of soluble substrate being available for metabolisation by H 2 producing microflora leading to a reduction in specific H 2 production. Adsorption of CO 2 from a gas stream generated from the dark fermentation process was successfully carried out. The data obtained demonstrate that the column filled with biomass-derived activated carbon resulted in a high degree of hydrogen purification. Co-adsorption of H 2 S onto the activated carbon also took place, there being no evidence of H 2 S present in the bio-H 2 exiting the column. Nevertheless, the concentration of H 2 S was very low, and this co-adsorption did not affect the CO 2 capture capacity of the activated carbon." @default.
• W2052566715 created "2016-06-24" @default.
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• W2052566715 date "2012-01-01" @default.
• W2052566715 modified "2023-09-26" @default.
• W2052566715 title "Hydrogen production from food wastes and gas post-treatment by CO2 adsorption" @default.
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• W2052566715 doi "https://doi.org/10.1016/j.wasman.2011.09.003" @default.
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