Bacteroides, similarly to Clostridia, secrete proteases to hydrolyse proteins to
the amino acids, which are further degraded to fatty acetate, propionate, butyrate, and ammonia. Klocke et al. (2008) suggested the phylum Bacteroidetes to be a part of microbial biogas consortia with Bacteroides detected as a predominant genus. In this study, however, Bacteroidetes were represented by members of three families: Bacteroidaceae (from 0.1% to 6.8% of total reads), Porphyromonadaceae (from 0.1% to 7.2% of total reads), and Prevotellaceae (from undetected to 24% of total reads).