Author(s): Menert, A., M. Michelis, E. Rikmann, V. Blonskaja, M. Kaljurand, T. Kallaste
In: Menert, A., M. Michelis, E. Rikmann, V. Blonskaja, M. Kaljurand, T. Kallaste (2010). Fermentation of biodegradable waste for production of renewable energy sources [In Estonian, abstract in English]. In: E. Vollmer, A. Normak (eds) Investigation and usage of renewable energy sources: Twelfth Conference Proceedings: Tartu, Estonia, 2010. Estonian University of Life Sciences. Pp. 49-59.
Type: Conference paper
Link to SEI author(s):
Biolagunevate jäätmete fermentatsioon taastuvate energiaallikate saamiseks (Fermentation of biodegradable waste for production of renewable energy sources)
It was found that even partial thermal pre-treatment (10% of raw sludge) increased the production of biogas up to 20%. Considering products of metabolism during anaerobic digestion the acetoclastic metanogenesis dominated. Culture independent technique - denaturing gradient gel electrophoresis (DGGE) was used in order to determine the impact of different pretreatment methods on the microbial community structure. Most of the bacteria identified were representatives of the phyla Chloroflexi and Bacteroidetes; all the identified archae were shown to represent the genus Methanosarcina - anaerobic methanogens,the main biogas producers occurring in landfills, WWtPs, in sea sediments and mammal guts. These archaea are able to produce methane by all three known methanogenic pathways - the hydrogenothrophic, acetoclastic and methylotrophic pathway.
Download the conference paper (PDF: 314kb)