Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Investigation of the effects of initial substrate and biomass concentrations and light intensity on photofermentative hydrogen gas production
Date
2014-01-01
Author
Akman, Melih Can
Erguder, Tuba Hande
Gündüz, Ufuk
Eroglu, Inci
Metadata
Show full item record
Item Usage Stats
171
views
0
downloads
Cite This
Biohydrogen, which can be produced by dark fermentation and photofermentation processes, is a renewable and clean approach for hydrogen production. In this study, it was aimed to determine the operational conditions which satisfy the highest photofermentative hydrogen production rate in batch reactors. To that purpose, the effects of initial substrate concentration, initial volatile suspended solids (VSS) concentration and light intensity on photofermentation process were investigated by using Response Surface Methodology (RSM). The photofermantative process was followed by using pure strain of purple non-sulfur (PNS) bacteria: Rhodobacter capsulatus DSM1710. Results indicated that, under the studied conditions, hydrogen production yields and rates varied in the range of 0.27 mmol H2/L.h and 0.91 mmol H2/L.h, respectively. RSM results revealed that the highest hydrogen production rate of 1.04 mmol/Lreactor.h can be obtained when acetate concentration, initial R.capsulatus concentration and the light intensity values were 35.35 mM, 0.27 g VSS/L and 263.6 W/ m2 (3955 lux), respectively. Optimum Substrate/Initial biomass concentration ratio (S/Xo), leading to the maximum hydrogen production rate, was found as 7.7 g Acetate/g VSS (8.3 g Chemical Oxygen Demand/g VSS). Moreover, the light intensity was found to be an important factor affecting the hydrogen production rate as well as S/Xo ratio.
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84925010566&origin=inward
https://hdl.handle.net/11511/70861
Conference Name
20th World Hydrogen Energy Conference, WHEC , 15-20 June 2014
Collections
Department of Environmental Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
Investigation of the effects of initial substrate and biomass concentrations and light intensity on photofermentative hydrogen gas production by Response Surface Methodology
Akman, Melih Can; Bayramoğlu, Tuba Hande; Gündüz, Ufuk; EROĞLU, İNCİ (2015-04-27)
Biohydrogen, which can be produced by dark fermentation and photofermentation processes, is a renewable and clean approach for hydrogen production. In this study, it was aimed to determine the operational conditions which satisfy the highest photofermentative hydrogen production rate in batch reactors. To that purpose, the effects of initial substrate concentration, initial volatile suspended solids (VSS) concentration and light intensity on photofermentation process, and their interactive effects were inve...
Investigation Of Influencing Factors For Biological Hydrogen Production By R. Capsulatus In Tubular Photo-Bioreactors
Boran, E.; Ozgur, E.; Gebicki, J.; van der Burg, J.; YÜCEL, MUSTAFA; Gündüz, Ufuk; Modigel, M.; Eroglu, I. (2009-05-13)
Biological hydrogen production processes are considered as an environmentally friendly way to produce hydrogen. They offer the chance to produce hydrogen from renewable energy sources, like sunlight and biomass. This study aims the process development for a photo-fermentative hydrogen production by photosynthetic purple-non-sulfur bacteria, Rhodobacter capsulatus, in a large scale (80L) tubular photo-bioreactor, in outdoor conditions, using acetate as carbon source. It was shown that Rhodobacter capsulatus ...
Investigation of sugar metabolism in rhizopus oryzae
Büyükkileci, Ali Oğuz; Hamamcı, Haluk; Department of Biotechnology (2007)
Rhizopus oryzae is a filamentous fungus, which can produce high amounts of L(+)-lactic acid and produces ethanol as the main by-product. In an effort to understand the pyruvate branch point of this organism, fermentations under different inoculum and glucose concentrations were carried out. At low inoculum size (1x103 spores ml-1), high amount of lactate (78 g l-1) was produced, whereas high ethanol concentration (37 g l-1) was obtained at high inoculum sizes (1x106 spores ml-1). Decreasing working volume i...
Analysis of velocity profiles in concentrated solid-liquid mixtures using ultrasound doppler velocimetry
Taşkın, Ahmet Fırat; Ayrancı Tansık, İnci; Uludağ, Yusuf; Department of Chemical Engineering (2021-7)
Stirred tanks are widely used for a variety of processes in industry such as solid dispersion, crystallization and dissolution processes. Several parameters are used to optimize these stirred tank processes such as impeller type, tank geometry and impeller speed. The flow field in the stirred tank is complex and varies depending on these parameters. In these processes diffusion and chemical reaction rate depend on the flow field and velocity fluctuations; therefore, information about the flow field is valua...
Application of density functional theory to propylene to propylene oxide catalytic reaction
Onay, Deniz; Önal, Işık; Fellah, Mehmet Ferdi; Department of Chemical Engineering (2015)
Current propylene oxide production highly relies on costly and environmentally disadvantageous processes. Direct propylene epoxidation on heterogeneous surface is desired to replace these processes. With this ultimate goal in mind, propylene epoxidation has been investigated on Cu2O(001) and RuO2(110) surfaces. Different elementary steps of the reaction mechanism that result in propylene oxide formation are analyzed on these catalytic models by using Density Functional Theory (DFT) calculations via Vienna A...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
M. C. Akman, T. H. Erguder, U. Gündüz, and I. Eroglu, “Investigation of the effects of initial substrate and biomass concentrations and light intensity on photofermentative hydrogen gas production,” KDJ Convention CenterGwangju, South Korea, 2014, vol. 2, p. 1276, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84925010566&origin=inward.