0 votes 0 votes The dominating microorganisms in an activated sludge process reactor are aerobic heterotrophs anaerobic heterotrophs autotrophs phototrophs Water and Waste Water Quality and Treatment gate2014-ce-2 water-and-waste-water-quality-and-treatment environmental-engineering activated-sludge-process + – Milicevic3306 asked Mar 25, 2018 • edited May 29, 2021 by Chandanachandu Milicevic3306 11.9k points answer See all 0 reply