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Bioreactor Systems for Thermophilic Fermentative Hydrogen Production: Evaluation and Comparison of Appropriate Systems by Christian Peintner; Ahmad A. Zeidan; Wolfgang Schnitzhofer is a Environmental Science article available to read on EtoBox.

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Numerous different bioreactor systems are applied for hydrogen production by dark fermentation. Thermophilic fermentations are gaining an increased interest due to the high hydrogen yields associated with them. In order to reach the best thermophilic fermentation system, 2 types of bioreactors, a trickling bed and a fluidized bed system, were constructed and operated under similar conditions. Both systems were designed to meet the requirements of thermophilic fermentations, such as reduction of hydrogen partial pressure, system immanence as its best as well as increasing cell densities. For comparing the 2 systems, the extreme thermophilic organism Caldicellulosiruptor owensensis OL T and a glucose-containing medium were employed. Parameters like hydraulic retention time, glucose concentration and stripping gas amount were varied. Each bioreactor system exhibited certain advantages; the trickling bed system enabled yields close to 3 mol-H 2 (mol-glucose) À1 and productivities of 0.2 L L À1 h À1 , but the application of stripping gas seemed to be obligatory. The fermentations in the fluidized bed system were characterized by slightly higher productivities (0.25 L L À1 h À1 ), but ge

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Author

Christian Peintner; Ahmad A. Zeidan; Wolfgang Schnitzhofer

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0959-6526)

Published

2010

Language

EN

Field

Environmental Science (Physical Sciences)