Anaerobic conversion of organic matter leads to the intermediate formation of volatile fatty acids (VFA), primarily butyrate, propionate and acetate. The present investigation examined methanogenesis from the VFA by microbial populations associated with natural and man-made cold habitats. Sites that were investigated included lake sediments, tundra wetland soil, sludge lagoons, manure store and anaerobic reactors operated at 3–9°C. Sharp increases in methanogenesis from VFA were observed as incubation temperatures were increased to 30°C. Low temperatures resulted in significant methane production, and butyrate was identified as an important VFA intermediate formed and degraded during sample incubations. The addition of butyrate and propionate to samples indicated that butyrate is degraded preferentially over propionate. Dilution of samples and, hence, microbial populations led to the accumulation of acetate and hydrogen when butyrate and propionate were degraded. Thus, at low temperatures, a highdensity of hydrogen- and acetate-utilizing methanogens is needed for methanogenesis from VFA to occur. An aggregation of proton-reducing acetogenic bacteria and methanogens accelerates this process.
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Research Article|
June 01 2000
Anaerobic production and degradation of volatile fatty acids in low temperature environments
A. N. Nozhevnikova;
A. N. Nozhevnikova
*Institute of Microbiology, Russian Academy of Sciences, Prospekt. 60-letiya Octyabrya 7, b. 2. 117811 Moscow, Russia
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S. Rebak;
S. Rebak
**Department of Agricultural, Environmental and System Technology, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
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O. R. Kotsyurbenko;
O. R. Kotsyurbenko
*Institute of Microbiology, Russian Academy of Sciences, Prospekt. 60-letiya Octyabrya 7, b. 2. 117811 Moscow, Russia
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S. N. Parshina;
S. N. Parshina
*Institute of Microbiology, Russian Academy of Sciences, Prospekt. 60-letiya Octyabrya 7, b. 2. 117811 Moscow, Russia
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C. Holliger;
C. Holliger
***Limnological Research Center of Swiss Federal Institute for Environmental Science and Technology, CH-6047 Kastanienbaum (LU), Switzerland
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G. Lettinga
G. Lettinga
**Department of Agricultural, Environmental and System Technology, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
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Water Sci Technol (2000) 41 (12): 39–46.
Citation
A. N. Nozhevnikova, S. Rebak, O. R. Kotsyurbenko, S. N. Parshina, C. Holliger, G. Lettinga; Anaerobic production and degradation of volatile fatty acids in low temperature environments. Water Sci Technol 1 June 2000; 41 (12): 39–46. doi: https://doi.org/10.2166/wst.2000.0236
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