Biological hydrogen production from sugar beet molasses by agar immobilized R. capsulatus in a panel photobioreactor

Date

2018-03-18

Author

ELKAHLOUT, Kamal
SAĞIR, EMRAH
ALIPOUR, Siamak
Koku, Harun
Gündüz, Ufuk
EROĞLU, İNCİ
Yücel, Ayşe Meral

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Biohydrogen production from sugar beet molasses was investigated by using agar immobilized R. capsulatus YO3. A panel photobioreactor (1.4 L) was employed for a long-term hydrogen production in both indoor and outdoor conditions. The impact of several initial molasses concentrations on hydrogen production, yield and productivity were assessed. Indoor studies revealed that initial sucrose concentration in molasses should be kept below 20 mM to prevent inhibition of hydrogen production. The highest hydrogen productivity of 0.64 +/- 0.06 mmol H-2 L-1 h(-1) and yield of 12.2 +/- 1.5 mol H-2/mol sucrose were obtained in indoors throughout 20 days of operation. For outdoors, hydrogen production continued for 40 days including consecutive 10 rounds under natural outdoor conditions. In outdoor conditions, the maximum hydrogen productivity and yield were 0.79 +/- 0.04 mmol H-2 L-1 h(-1) and 5.2 +/- 0.4 mol H-2/mol sucrose respectively. These results indicate that the proposed system is promising for biohydrogen production from molasses at large-scale natural conditions. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Subject Keywords

Photobioreactor, Biological hydrogen, Cell immobilization, Rhodobacter capsulatus, Sugar beet molasses

URI

https://hdl.handle.net/11511/29858

DOI

https://doi.org/10.1016/j.ijhydene.2018.06.052

Collections

Graduate School of Natural and Applied Sciences, Conference / Seminar

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Citation Formats

K. ELKAHLOUT et al., “Biological hydrogen production from sugar beet molasses by agar immobilized R. capsulatus in a panel photobioreactor,” 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/29858.