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Immobilized bacteria cultures in continuous fermentative hydrogen production
Roman Zagrodnik
Abstract
The solution to limited fossil fuel supply is utilization of renewable energy sources. However, regardless of the source, the energy has to be delivered to the user through an efficient carrier, that can be used in a wide range of applications. Hydrogen is considered to be one of the most promising fuels of the future, and a potential substitute for fossil fuels. Biological hydrogen production provide an alternative method for generation of renewable hydrogen. Anaerobic bacteria produce H2 during dark fermentation of complex organic substrates by using protons as an electron sink. The by-products are mainly composed of volatile fatty acids (VFAs). However, VFAs could be utilized for additional H2 production during photofermentation process. Integration of these two bioprocesses could theoretically yield 12 mol of H2 per 1 mol of glucose, so they offer a dual function of waste reduction and hydrogen energy production. The main aim of this thesis was to create and investigate a single-stage continuously operated hybrid system based on a combination of dark and photo fermentation. In addition, immobilization of microorganisms on different carriers and a combination of different bacterial strains was studied. The main idea of this PhD thesis was optimization of the processes to obtain maximum production of hydrogen, with a maximum degree of reduction of organic compounds in the medium. Research was focused on understanding the influence of basic parameters such as pH, temperature, light intensity and hydraulic retention time on hydrogen production and composition of cellular metabolites in the tested systems.- Record ID
- UAM96870450e5ca47f983e7a3eff9ca927a
- Diploma type
- Doctor of Philosophy
- Author
- Title in Polish
- Immobilizowane kultury bakteryjne do produkcji wodoru w fermentowanych procesach ciągłych
- Title in English
- Immobilized bacteria cultures in continuous fermentative hydrogen production
- Language
- pol (pl) Polish
- Certifying Unit
- Wydział Chemii [nowa struktura organizacyjna] (SNŚ/WC)
- Scientific discipline (2.0)
- Status
- Finished
- Year of creation
- 2015
- Defense Date
- 08-12-2015
- Title date
- 08-12-2015
- Supervisor
- URL
- http://hdl.handle.net/10593/14074 Opening in a new tab
- Keywords in English
- Hydrogen, fermentation, immobilization, continuous processes, hybrid processes
- Abstract in English
- The solution to limited fossil fuel supply is utilization of renewable energy sources. However, regardless of the source, the energy has to be delivered to the user through an efficient carrier, that can be used in a wide range of applications. Hydrogen is considered to be one of the most promising fuels of the future, and a potential substitute for fossil fuels. Biological hydrogen production provide an alternative method for generation of renewable hydrogen. Anaerobic bacteria produce H2 during dark fermentation of complex organic substrates by using protons as an electron sink. The by-products are mainly composed of volatile fatty acids (VFAs). However, VFAs could be utilized for additional H2 production during photofermentation process. Integration of these two bioprocesses could theoretically yield 12 mol of H2 per 1 mol of glucose, so they offer a dual function of waste reduction and hydrogen energy production. The main aim of this thesis was to create and investigate a single-stage continuously operated hybrid system based on a combination of dark and photo fermentation. In addition, immobilization of microorganisms on different carriers and a combination of different bacterial strains was studied. The main idea of this PhD thesis was optimization of the processes to obtain maximum production of hydrogen, with a maximum degree of reduction of organic compounds in the medium. Research was focused on understanding the influence of basic parameters such as pH, temperature, light intensity and hydraulic retention time on hydrogen production and composition of cellular metabolites in the tested systems.
- Thesis file
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- File: 1
- doktorat-Roman Zagrodnik.pdf
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- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/phd/UAM96870450e5ca47f983e7a3eff9ca927a/
- URN
urn:amu-prod:UAM96870450e5ca47f983e7a3eff9ca927a