Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 37, Issue 20, Pages 15547-15555Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.01.035
Keywords
Anaerobic fermentation; Biohydrogen; Cellulose; Ethanol; Taguchi experimental design; Distillers grains
Categories
Funding
- Bureau of Energy, MOEA, Taiwan [99-D0137-2]
- National Science Council of Taiwan [NSC 99-2221-E-035-024-MY3, NSC 99-2221-E-035-025-MY3, NSC 99-2221-E-035-035-MY3]
- Feng Chia University [FCU-09G27102]
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The feasibility of hydrogen production from distillers grains substrate, an industrial cellulosic waste, was investigated. A substrate concentration of 80 g/L gave the maximum production at 50 degrees C and pH of 6.0 using sewage sludge. Four controllable factors with three levels: seed sludge (two sewage sludges and cow dung), temperature (40, 50, and 60 degrees C), pH (6, 7 and 8) and seed pretreatment (none, heat, and acid) were selected in Taguchi experimental design to optimize fermentation conditions. The peak hydrogen and ethanol productions were found with heat-treated cow dung seed, substrate concentration 80 g/L, 50 degrees C and pH 6. The peak hydrogen production rate and hydrogen yield were 7.9 mmol H-2/L/d and 0.40 mmol H-2/g-COD respectively whereas the peak ethanol production was 3050 mg COD/L and rate 0.22 g EtOH/L/d. A total bioenergy yield of 41 J/g substrate was obtained which was 21% and 79% from hydrogen and ethanol respectively. Crown Copyright (c) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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