Microalgal biomass as a feedstock for bio-hydrogen production

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In the present work, H-2 production from microalgal biomass via dark fermentation was optimized by response surface methodology (RSM). Substrate concentration and initial pH were varied from 3 to 117 g dry cell weight (dcw)/L and 4.2-9.8, respectively. During the fermentation, pH was not controlled. The optimal condition was found at 76 g dcw/L and initial pH of 7.4, under which yielded 31.2 mL H-2/g dcw. The results of ANOVA verify that the relationship between substrate concentration and initial pH was slightly interdependent or significantly interactive. Besides, the monitoring alkalinity and pH during the confirmation test clearly showed that dark fermentative H-2 production (DFHP) from microalgal biomass was feasible without addition of external alkaline owing to the disruption of cell wall, which provided buffer capacity (max. 3800 mg as CaCO3/L). Therefore, although it involved a batch test, this approach would promote the practical viability of DFHP from microalgal biomass. The main organic acids were acetic and butyric acids which are general metabolites found in successful DFHP. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2012-10
Language
English
Article Type
Article
Keywords

CHLORELLA-VULGARIS; REACTOR SYSTEM; SEWAGE-SLUDGE; PH CONTROL; WASTE; FERMENTATION; OPTIMIZATION; BIOHYDROGEN; BIOFUELS; ALGAE

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.37, no.20, pp.15533 - 15539

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2012.02.017
URI
http://hdl.handle.net/10203/103848
Appears in Collection
CE-Journal Papers(저널논문)
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