Journal article
Biohydrogen production from glucose in upflow biofilm reactors with plastic carriers under extreme thermophilic conditions (70(degree)C)
Biohydrogen could efficiently be produced in glucose-fed biofilm reactors filled with plastic carriers and operated at 70°C. Batch experiments were, in addition, conducted to enrich and cultivate glucose-fed extremethermophilic hydrogen producing microorganisms from a biohydrogen CSTR reactor fed with household solid waste.
Kinetic analysis of the biohydrogen enrichment cultures show that substrate (glucose) likely inhibited hydrogen production when its concentration was higher than 1 g/L. Different start up strategies were applied for biohydrogen production in biofilm reactors operated at 70°C, and fed with synthetic medium with glucose as the only carbon and energy source.
A biofilm reactor, started up with plastic carriers, that were previously inoculated with the enrichment cultures, resulted in higher hydrogen yield (2.21 mol H2/mol glucose consumed) but required longer start up time (1 month), while a biofilm reactor direcdy inoculated with the enrichment cultures reached stable state much faster (8 days) but with very low hydrogen yield (0.69 mol H2/mol glucose consumed).
These results indicate that hydraulic pressure is necessary for successful immobilization of bacteria on carriers, while there is the risk of washing out specific high yielding bacteria. © 2008 Wiley Periodicals, Inc.
Language: | English |
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Publisher: | Wiley Subscription Services, Inc., A Wiley Company |
Year: | 2008 |
Pages: | 1034-1038 |
ISSN: | 10970290 and 00063592 |
Types: | Journal article |
DOI: | 10.1002/bit.21826 |
ORCIDs: | Angelidaki, Irini |