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The genera with significantly different (p < 0.05, n = 3) OTU numbers among ABR, MFC-ABR and initial sludge and their annotated functions in FAPROTAX. The background color of each genus indicate its phylum. The circles filled with different colors indicate the functions of the corresponding genus. The bars in the outmost layer indicate the enhanced-fold of the genus in MFC-ABR and ABR, relative to the genus in initial sludge.
