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Photofermentation as a third-stage of a dark fermentation-methanogenesis system to improve energy recovery
Date
2018-11-20
Author
Bayramoğlu, Tuba Hande
Koç, Engin
Akman, Melih Can
Eroğlu, İnci
Gündüz, Ufuk
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https://hdl.handle.net/11511/78012
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Photofermentative hydrogen production using dark fermentation effluent of sugar beet thick juice in outdoor conditions
Ozkan, Endam; Uyar, Basar; Ozgur, Ebru; Yucel, Meral; Eroglu, Inci; Gündüz, Ufuk (2012-01-01)
In the present study, photofermentative hydrogen production on thermophilic dark fermentation effluent (DFE) of sugar beet thick juice was investigated in a solar fed-batch panel photobioreactor (PBR) using Rhodobacter capsulatus YO3 (hup(-)) during summer 2009 in Ankara, Turkey. The DFE was obtained by continuous dark fermentation of sugar beet thick juice by extreme thermophile Caldicellulosiruptor saccharolyticus and it contains acetate (125 mM) and NH4+ (7.7 mM) as the main carbon and nitrogen sources, ...
Photofermentative hydrogen production using dark fermentation effluent of sugar beet thick juice by Rhodobacter Capsulatus
Özkan, Endam; Gündüz, Ufuk; Uyar, Başar; Department of Biotechnology (2011)
Biological hydrogen production through integration of dark and photo-fermentation by using biomass is a promising alternative for energy supply problems. The main purpose of this study was to investigate photobiological H2 production by the purple non-sulfur (PNS) bacteria Rb. capsulatus on dark fermentation effluent of sugar beet thick juice (DFESBTJ). Presence of NH4+ in effluents is an important parameter since NH4+ inhibit the nitrogenase enzyme activity. Therefore, the influence of different NH4+ conce...
Photofermentative hydrogen production from volatile fatty acids present in dark fermentation effluents
Uyar, Basar; Eroglu, Inci; Yucel, Meral; Gündüz, Ufuk (2009-05-01)
In the present study, the growth and hydrogen production of Rhodobacter sphaeroides O.U. 001, was investigated in media containing five different volatile fatty acids (VIA) individually (malate, acetate, propionate, butyrate and lactate) and in media containing mixtures of these acids that reflect the composition of dark fermentation effluents. The highest hydrogen production rate was obtained in malate (24 ml(hydrogen)/I(reactor)h) and the highest biomass concentration was obtained in acetate containing me...
Photoproduction of hydrogen by Rhodobacter capsulatus from thermophilic fermentation effluent
Uyar, Basar; Schumacher, Matthias; Gebicki, Jakub; Modigell, Michael (2009-08-01)
Rhodobacter capsulatus was used for the phototrophic hydrogen production on effluent solution derived from the thermophilic fermentation of Miscanthus hydrolysate by Thermotoga neapolitana. Pretreatments such as centrifugation, dilution, buffer addition, pH adjustment and sterilization were suggested for the effluent before being fed to the photofermentation. Batch-wise experiments showed that R. capsulatus grows and produces hydrogen on the pretreated effluent solution. Moreover, it was found that the hydr...
Photofermentative Hydrogen Production
Sağır, Emrah; Hallenbeck, Patrick C. (2019-01-01)
There are many biological paths to hydrogen production, each with potential advantages, but also with its own challenges to implementation. The nonsulfur photosynthetic bacteria use a process termed as photofermentation to harness solar energy for the close to stoichiometric conversion of various carbon substrates to hydrogen, releasing carbon dioxide. These organisms can potentially use various feedstocks, but are particularly adept at the light-driven production of hydrogen from organic acids. Thus they a...
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T. H. Bayramoğlu, E. Koç, M. C. Akman, İ. Eroğlu, and U. Gündüz, “Photofermentation as a third-stage of a dark fermentation-methanogenesis system to improve energy recovery,” 2018, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/78012.