A compact tubular photobioreactor for outdoor hydrogen production from molasses

Eroglu, Inci
Koku, Harun
Hydrogen can be produced sustainably by photofermentation of biomass. For an economically feasible operation, the process should be implemented outdoors using low-cost organic material. In the current study, molasses from a sugar factory was utilized for photofermentative hydrogen production. The experiment was run with Rhodobacter capsulatus YO3 (hup-) in fed-batch mode under outdoor conditions in Ankara between July 12, 2015 and July 24, 2015. The stacked U-tube photobioreactor (9 L) designed for outdoor photobiological hydrogen production by our group was used. The design consists of 4 stacked U-tubes and 2 vertical manifolds. During the operation, the sucrose concentration in the reactor was adjusted to 5 mM daily by diluting the molasses. Maintaining pH at the desired level (around 7.0) was the main challenge of the operation. The pH value was eventually stabilized at 5.9 and hydrogen production was sustained for 8 days with continuous feeding of molasses. The maximum productivity was found as 0.31 mol H-2/(m(3) h). In this study, a long term photobiological hydrogen production from molasses under outdoor conditions was demonstrated for the first time. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.


Design and analysis of tubular photobioreactors for biohydrogen production
Kayahan, Emine; Eroğlu, İnci; Koku, Harun; Department of Chemical Engineering (2015)
Hydrogen can be produced sustainably by utilizing organic wastes through photofermentation. In order to obtain an economically feasible operation, the photobioreactor design is of crucial importance. An optimal photobioreactor design should provide uniform velocity and light distribution, low pressure drop, low gas permeability and efficient gas-liquid separation. The aim of this study was to design a pilot-scale photobioreactor satisfying these criteria and to test the reactor under outdoor conditions with...
Biohydrogen production in an outdoor panel photobioreactor on dark fermentation effluent of molasses
Avcioglu, Sevler Gokce; Ozgur, Ebru; Eroglu, Inci; Yucel, Meral; Gündüz, Ufuk (2011-08-01)
Hydrogen is regarded as an ideal energy carrier if it is produced from renewable resources such as biomass. Sequential operation of dark and photofermentation allows a highly efficient production of hydrogen from biomass, as maximal conversion of the energy in the carbohydrates to hydrogen can be achieved. In this study photofermentative hydrogen production was carried out in a solar panel photobioreactor by Rhodobacter capsulatus wild type (DSM 1710) and Rhodobacter capsulatus hup(-) (YO3) strain on the mo...
Potential use of thermophilic dark fermentation effluents in photofermentative hydrogen production by Rhodobacter capsulatus
Ozgur, Ebru; Afsar, Nilufer; de Vrije, Truus; Yucel, Meral; Gündüz, Ufuk; Claassen, Pieternel A. M.; Eroglu, Inci (2010-01-01)
Biological hydrogen production by a sequential operation of dark and photofermentation is a promising route to produce hydrogen. The possibility of using renewable resources, like biomass and agro-industrial wastes, provides a dual effect of sustainability in biohydrogen production and simultaneous waste removal. In this study, photofermentative hydrogen production on effluents of thermophilic dark fermentations on glucose, potato steam peels (PSP) hydrolysate and molasses was investigated in indoor, batch ...
Biohydrogen production from beet molasses by sequential dark and photofermentation
Ozgur, Ebru; Mars, Astrid E.; Peksel, Beguem; Louwerse, Annemarie; Yucel, Meral; Gündüz, Ufuk; Claassen, Pieternel A. M.; Eroglu, Inci (2010-01-01)
Biological hydrogen production using renewable resources is a promising possibility to generate hydrogen in a sustainable way. In this study, a sequential dark and photofermentation has been employed for biohydrogen production using sugar beet molasses as a feedstock. An extreme thermophile Caldicellulosiruptor saccharolyticus was used for the dark fermentation, and several photosynthetic bacteria (Rhodobacter capsulatus wild type, R. capsulatus hup(-) mutant, and Rhodopseudomonas palustris) were used for t...
Long-term stable hydrogen production from acetate using immobilized Rhodobacter capsulatus in a panel photobioreactor
Elkahlout, Kamal; Sagir, Emrah; Alipour, Siamak; Koku, Harun; Gündüz, Ufuk; Eroglu, Inci; Yucel, Meral (2019-07-12)
Biological hydrogen production is attractive since renewable resources are utilized for hydrogen production. In this study, a novel panel photobioreactor (1.4 L) was constructed from Plexiglas with a network of nylon fabric support for agar immobilized bacteria complex. Two strains of Rhodobacter capsulatus DSM 1710 wild-type strain and Rhodobacter capsulatus YO3 (hup(-), uptake hydrogenase deleted mutant) with cell concentrations of 2.5 and 5.0 mg dcw/mL agar, respectively were entrapped by 4% (w/v) of aga...
Citation Formats
E. KAYAHAN, I. Eroglu, and H. Koku, “A compact tubular photobioreactor for outdoor hydrogen production from molasses,” INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, pp. 2575–2582, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37168.