Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7068858 | Bioresource Technology | 2018 | 34 Pages |
Abstract
Hydrogen generation from complex substrates composed of simple sugars has the potential to mitigate future worldwide energy demand. The biohydrogen potential of a sequential microaerobic dark- and photo-fermentative system was investigated using immobilized Rhodobacter capsulatus JP91. Biological hydrogen production from glucose was carried out using a batch process and a bench-scale bioreactor. Response surface methodology with a Box-Behnken design was employed to optimize key parameters such as inoculum concentration, oxygen concentration, and glucose concentration. The maximum hydrogen production (21â¯Â±â¯0.25â¯mmolâ¯H2/L) and yield (7.8â¯Â±â¯0.1â¯molâ¯H2/mol glucose) were obtained at 6â¯mM glucose, 4.5% oxygen and 62.5â¯v/v% inoculum concentration, demonstrating the feasibility of enhanced hydrogen production by immobilized R. capsulatus JP91 in a sequential system. This is the first time that a sequential process using an immobilized system has been described. This system also achieved the highest hydrogen yield obtained by an immobilized system so far.
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Authors
Emrah SaÄır, Meral Yucel, Patrick C. Hallenbeck,