Enhanced biogas yield from energy crops with rumen anaerobic fungi

0386710 - ÚŽFG 2013 RIV DE eng J - Článek v odborném periodiku
Procházka, J. - Mrázek, Jakub - Štrosová, Lenka - Fliegerová, Kateřina - Zábranská, J. - Dohányos, M.
Enhanced biogas yield from energy crops with rumen anaerobic fungi.
Engineering in Life Sciences. Roč. 12, č. 3 (2012), s. 343-351. ISSN 1618-0240. E-ISSN 1618-2863
Grant CEP: GA ČR GPP503/10/P394; GA MZe QI92A286
Institucionální podpora: RVO:67985904
Klíčová slova: Anaerobic digestion * Anaerobic fungi * Biogas yield
Kód oboru RIV: EI - Biotechnologie a bionika
Impakt faktor: 1.633, rok: 2012

Anaerobic fungi (AF) are able to degrade crop substrates with higher efficiency than commonly used anaerobic bacteria. The aim of this study was to investigate ways of use of rumen AF to improve biogas production from energy crops under laboratory conditions. In this study, strains of AF isolated from feces or rumen fluid of cows and deer were tested for their ability to integrate into the anaerobic bacterial ecosystem used for biogas production, in order to improve degradation of substrate polysaccharides and consequently the biogas yield. Batch culture, fed batch culture, and semicontinuous experiments have been performed using anaerobic sludge from pig slurry fermentation and different kinds of substrates (celluloses, maize, and grass silage) inoculated by different genera of AF. All experiments showed a positive effect of AF on the biogas yield and quality. AF improved the biogas production by 422%, depending on the substrate and AF species used. However, all the cultivation experiments indicated that rumen fungi do not show long-term survival in fermenters with digestate from pig slurry. The best results were achieved during fed batch experiment with fungal culture Anaeromyces (KF8), in which biogas production was enhanced during the whole experimental period of 140 days. This result has not been achieved in semicontinuous experiment, where increment in biogas production in fungal enriched reactor was only 4% after 42 days.
Trvalý link: http://hdl.handle.net/11104/0215989