Size (Peak day design capacity, gallons per day) - 5,000,001 - 10,000,000 | 20 |
Pretreatment - Fine screens, including microscreens | 3 |
Primary Treatment - Primary clarifiers | 4 |
Secondary Treatment - Activated sludge: Diffused or dispersed aeration | 10 |
Secondary Treatment - Secondary clarifiers with chemical addition | 7 |
Sludge Thickening and Dewatering - Gravity thickener basin | 3 |
Sludge Thickening and Dewatering - Belt filter press, plate-and-frame press, or vacuum filter | 8 |
Sludge Stabilization and Conditioning - Chemical stabilization with lime | 3 |
Solids Disposal - Off-site disposal | 1 |