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Appl Environ Microbiol. 1988 May; 54(5): 1126-1130
Copyright © 1988, American Society for Microbiology. All Rights Reserved.

Relationship between Methanogenic Cofactor Content and Maximum Specific Methanogenic Activity of Anaerobic Granular Sludges

Department of Microbiology, Faculty of Science, University of Nijmegen, NL-6525 ED Nijmegen, The Netherlands

ABSTRACT

In this study we investigated whether a relationship exists between the methanogenic activity and the content of specific methanogenic cofactors of granular sludges cultured on different combinations of volatile fatty acids in upflow anaerobic sludge blanket or fluidized-bed reactors. Significant correlations were measured in both cases between the contents of coenzyme F₄₂₀–2 or methanopterin and the maximum specific methanogenic activities on propionate, butyrate, and hydrogen, but not acetate. For both sludges the content of sarcinapterin appeared to be correlated with methanogenic activities on propionate, butyrate, and acetate, but not hydrogen. Similar correlations were measured with regard to the total content of coenzyme F₄₂₀–4 and F₄₂₀–5 in sludges from fluidized-bed reactors. The results indicate that the contents of specific methanogenic cofactors measured in anaerobic granular sludges can be used to estimate the hydrogenotrophic or acetotrophic methanogenic potential of these sludges.

^* Corresponding author.

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