Size (Peak day design capacity, gallons per day) - 5,000,001 - 10,000,000 | 20 |
Pretreatment - Fine screens, including microscreens | 3 |
Pretreatment - Grit removal | 2 |
Secondary Treatment - Activated sludge: Diffused or dispersed aeration | 10 |
Secondary Treatment - Secondary clarifiers | 4 |
Sludge Thickening and Dewatering - Belt filter press, plate-and-frame press, or vacuum filter | 8 |
Sludge Stabilization and Conditioning - Aerobic digestion | 5 |
Solids Disposal - Off-site disposal | 1 |
Disinfection - Ultraviolet light | 3 |