Biological hydrogen production from olive mill wastewater with two-stage processes

Date

2006-09-01

Author

Eroglu, Ela
Eroglu, Inci
Gündüz, Ufuk
Turker, Lemi
Yucel, Meral

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In the present work two novel two-stage hydrogen production processes from olive mill wastewater (OMW) have been introduced. The first two-stage process involved dark-fermentation followed by a photofermentation process. Dark-fermentation by activated sludge cultures and photofermentation by Rhodobacter sphaeroides O.U.001 were both performed in 55 ml glass vessels, under anaerobic conditions. In some cases of dark-fermentation, activated sludge was initially acclimatized to the OMW to provide the adaptation of microorganisms to the extreme conditions of OMW. The highest hydrogen production potential obtained was 291H(2)/l(OMW) after photofermentation with 50% (v/v) effluent of dark fermentation with activated sludge. Photofermentation with 50% (v/v) effluent of dark fermentation with acclimated activated sludge had the highest hydrogen production rate (0.00811(-1) h(-1)).

Subject Keywords

Biological hydrogen production, Olive mill wastewater, Clay treatment, Coupled system, Photofermentation, Dark fermentation

URI

https://hdl.handle.net/11511/30531

Journal

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

DOI

https://doi.org/10.1016/j.ijhydene.2006.06.020

Collections

Graduate School of Natural and Applied Sciences, Article

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Photosynthetic bacterial growth and productivity under continuous illumination or diurnal cycles with olive mill wastewater as feedstock Eroglu, Ela; Gündüz, Ufuk; Yucel, Meral; Eroglu, Inci (2010-06-01) Photofermentative hydrogen production from olive mill wastewater by Rhodobacter sphaeroides O.U.001 was investigated under different regimes of illumination. The analysis included measurements of biomass accumulation, H(2)-production, high-value bio-product accumulation (polyhydroxybutyrate and carotenoid) and measurements of the medium pH as a function of growth and productivity. Batch cultures were grown under continuous light (CL) or 12 h light/12 h dark (12L/12D) diurnal cycles. Growth under CL or 12L/1...
Effect of iron and molybdenum addition on photofermentative hydrogen production from olive mill wastewater Eroglu, Ela; Gündüz, Ufuk; Yucel, Meral; Eroglu, Inci (2011-05-01) Photofermentative hydrogen production from olive mill wastewater (OMW) by Rhodobacter sphaeroides O.U.001 was assessed under iron and molybdenum supplementation. Control cultures were only grown with 2% OMW containing media. The analysis included measurements of biomass accumulation, hydrogen production, pH variations of the medium, and changes in the chemical oxygen demand (COD) of the wastewater. Growth under control and Mo-supplemented experiments yielded about the same amount of biomass (similar to 0.4 ...
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...
Treatment of olive mill wastewater by different physicochemical methods and utilization of their liquid effluents for biological hydrogen production Eroglu, Ela; Erolu, Inci; Gündüz, Ufuk; Yucel, Meral (2009-04-01) in this study various two-stage processes were investigated for biological hydrogen production from olive mill wastewater (OMW) by Rhodobacter sphaeroides O.U.001. Two-stage processes consist of physicochemical pretreatment of OMW followed by photofermentation for hydrogen production. Explored pretreatment methods were chemical oxidation with ozone and Fenton's reagent, photodegradation by UV radiation, and adsorption with clay or zeolite. Among these different two-stage processes, strong chemical oxidants ...
Biological hydrogen production from olive mill wastewater and its applications to bioremediation Eroğlu, Ela; Eroğlu, İnci; Department of Chemical Engineering (2006) Hydrogen production by photosynthetic bacteria occurs under illumination in the presence of anaerobic atmosphere from the breakdown of organic substrates, which is known as photofermentation. In this study, single-stage and two-stage process development were investigated for photofermentative hydrogen production from olive mill wastewater by Rhodobacter sphaeroides O.U.001 within indoor and outdoor photobioreactors. It was proven that diluted olive mill wastewater (OMW) could be utilized for photobiological...

Citation Formats

E. Eroglu, I. Eroglu, U. Gündüz, L. Turker, and M. Yucel, “Biological hydrogen production from olive mill wastewater with two-stage processes,” INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, pp. 1527–1535, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30531.