Size (Peak day design capacity, gallons per day) - 5,000,001 - 10,000,000 | 20 |
Pretreatment - Influent pumping | 2 |
Pretreatment - Mechanically cleaned screens | 2 |
Pretreatment - Grit removal | 2 |
Secondary Treatment - Activated sludge: Pure oxygen | 15 |
Secondary Treatment - Secondary clarifiers | 4 |
Sludge Thickening and Dewatering - Gravity thickener basin | 3 |
Sludge Thickening and Dewatering - Centrifuge | 6 |
Sludge Stabilization and Conditioning - Aerobic digestion | 5 |
Solids Disposal - Off-site disposal | 1 |
Disinfection - Liquid and powdered hypochlorites | 3 |
Disinfection - Additional points if hypochlorites are generated on-site | 2 |
Disinfection - Dechlorination with dechlorination agents other than gas | 3 |
Effluent Discharge - Plant pumping of effluent | 2 |