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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)
6.5 chemical sciences
Status
Finished
Year of creation
2015
Defense Date
08-12-2015
Title date
08-12-2015
Supervisor
Marek Łaniecki Marek Łaniecki,, Wydział Chemii [nowa struktura organizacyjna] (SNŚ/WC)Szkoła Nauk Ścisłych [nowa struktura organizacyjna] (SNŚ)
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
  • 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

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