Biohydrogen production by Rhodobacter capsulatus in solar tubular photobioreactor on thick juice dark fermenter effluent

Date

2012-08-01

Author

Boran, Efe
Ozgur, Ebru
Yucel, Meral
Gündüz, Ufuk
Eroglu, Inci

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The purpose of this study was to operate a pilot scale solar tubular photobioreactor (90 L) for photofermentative hydrogen production from thick juice dark fermenter effluent (DEE) by photosynthetic purple-non-sulfur bacterium, Rhodobacter capsulatus. The tubular photobioreactor was equipped with internal cooling tubes for effective temperature control, which is essential for stable, long-term operation. The photobioreactor was operated in fed-batch mode throughout September 2009 in Ankara, Turkey. R. capsulatus had a rapid growth with a specific growth rate of 0.025 h(-1) in the exponential phase. The growth was modeled and the parameters were compared with the results obtained in artificial medium. An exponential relationship was found between daily specific growth rates during fedbatch operation and daily total light energy received. The average molar productivity calculated according to daylight time was 0.15 mol H-2/(m(3) h). The yield obtained was 0.4 mol H-2/mol acetic acid consumed. The hydrogen yield factor was related to the daily total light energy received. Acetic acid utilization for different metabolic pathways was investigated. Maximum COD removal efficiency throughout the operation was calculated as 68%. This study showed that sequential operation of dark and photofermentation is a promising route to produce biological hydrogen from thick juice.

Subject Keywords

Thick juice, Dark fermenter effluent, Photofermentation, Rhodobacter capsulatus, Tubular photobioreactor, Biohydrogen

URI

https://hdl.handle.net/11511/30906

Journal

JOURNAL OF CLEANER PRODUCTION

DOI

https://doi.org/10.1016/j.jclepro.2012.03.020

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

E. Boran, E. Ozgur, M. Yucel, U. Gündüz, and I. Eroglu, “Biohydrogen production by Rhodobacter capsulatus in solar tubular photobioreactor on thick juice dark fermenter effluent,” JOURNAL OF CLEANER PRODUCTION, pp. 150–157, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30906.