- Over 300 strains of bacteria have been found in activated sludge.
- The acclimated active sludge could degrade 78% of oil in 24h.
- Acetate was degraded by denitrifying activated sludge.
- Respirometer was used to monitor microbial activity in activated sludge.
- The trickling filter and activated sludge efficiencies cited required primary sedimentation and effluent circulation.