Fig. 2: Global average percent relative abundance of the most abundant known PAOs (genera).

Abundance is shown across (A) different process configurations (N plants = 480; C - carbon removal; C,N - carbon removal and nitrification; C,N,DN - carbon removal, nitrification and denitrification; C,N,DN,P - carbon removal, nitrification, denitrification and phosphorus removal), and (B) across the world in plants with N and P-removal (C,N,DN,P) plants (N plants = 111). The same is shown for Tetrasphaera species in C and (D) Taxa without species classification are shown as individual ASVs. Data comes from the global survey of microbial communities in WWTPs (Dueholm et al. [20]).