Fig. 4From: Role in aromatic metabolites biodegradation and adverse implication of denitrifying microbiota in kitchen waste compostingEffect of denitrification on fulvic acid. (a) the concentration of fulvic acid; (b) the copies number of aromatic-degrading functional gene paak; (c) the aromatic metabolites significantly related to fulvic acid (P < 0.05)Back to article page