Improvement of Biogas Production by Bioaugmentation

Kovács, Kornél Lajos and Ács, Norbert and Kovács, Etelka and Wirth, Roland and Rákhely, Gábor and Strang, Orsolya and Herbel, Zsófia and Bagi, Zoltán (2013) Improvement of Biogas Production by Bioaugmentation. BIOMED RESEARCH INTERNATIONAL, 2013. ISSN 2314-6133


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Biogas production technologies commonly involve the use of natural anaerobic consortia of microbes. The objective of this study was to elucidate the importance of hydrogen in this complex microbial food chain. Novel laboratory biogas reactor prototypes were designed and constructed. The fates of pure hydrogen-producing cultures of Caldicellulosiruptor saccharolyticus and Enterobacter cloacae were followed in time in thermophilic and mesophilic natural biogas-producing communities, respectively. Molecular biological techniques were applied to study the altered ecosystems. A systematic study in 5-litre CSTR digesters revealed that a key fermentation parameter in the maintenance of an altered population balance is the loading rate of total organic solids. Intensification of the biogas production was observed and the results corroborate that the enhanced biogas productivity is associated with the increased abundance of the hydrogen producers. Fermentation parameters did not indicate signs of failure in the biogas production process. Rational construction of more efficient and sustainable biogas-producing microbial consortia is proposed.

Item Type: Article
Subjects: Q Science / természettudomány > QH Natural history / természetrajz > QH301 Biology / biológia
Depositing User: MTMT SWORD
Date Deposited: 15 Oct 2013 09:41
Last Modified: 15 Oct 2013 09:41

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