Abstract
The aim of the present work was to investigate the dynamics of microbial community at DNA and RNA level and the role of bamA and mcrA gene during anaerobic digestion of phenol and p-cresol. Anaerobic digestion was conducted in batch reactors and microbial community dynamics was analysed. Results showed that active microbial community was quite dissimilar in comparison to the total microbial community. Syntrophorhabdus and Bacillus were the dominant active bacterial genera whereas Methanosaeta together with Methanobacterium showed the highest potential activity in the Archaea domain indicating a relevant role of these microorganisms in the anaerobic process. Ecological Networks revealed dissimilar interactions at DNA and RNA level, being the latter a better descriptor of the known roles of dominant OTUs. QRT-PCR results showed that expression of bamA gene correlated positively with instantaneous degradation rate proving for first time its functionality and its relationship with the kinetics of the process.
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