期刊
JOURNAL OF POWER SOURCES
卷 169, 期 1, 页码 131-139出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2007.01.050
关键词
dark fermentation; hydrogen; waste treatment; factorial design; optimization; desirability function
Various mixtures incorporating a simulated organic fraction of municipal solid wastes and blood from a poultry slaughterhouse were used as substrate in a dark fermentation process for the production of hydrogen. The individual and interactive effects of hydraulic retention time (HRT), solid content in the feed (%TS) and proportion of residues (%Blood) on bio-hydrogen production were studied in this work. A central composite design and response surface methodology were employed to determine the optimum conditions for the hydrogen production process. Experimental results were approximated to a second-order model with the principal effects of the three factors considered being statistically significant (P < 0.05). The production of hydrogen obtained from the experimental point at conditions close to best operability was 0.97 L Lr-1 day(-1). Moreover, a desirability function was employed in order to optimize the process when a second, methanogenic, phase is coupled with it. In this last case, the optimum conditions lead to a reduction in the production of hydrogen when the optimization process involves the maximization of intermediary products. (c) 2007 Elsevier B.V. All rights reserved.
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