Fig. 1
From: Global abundance patterns, diversity, and ecology of Patescibacteria in wastewater treatment plants
Global WWTP sample set used in this study. Sankey diagram showing the geographical source, plant types, and activated sludge process types of 565 analyzed WWTP samples. MBBR: moving bed bioreactor; MBR: membrane bioreactor; C: carbon removal; C, N: carbon removal with nitrification; C, N, DN: carbon removal with nitrification and denitrification; C, N, DN, P: carbon removal with nitrogen and enhanced biological phosphorus removal (EBPR)