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 |
Primary Treatment - Primary clarifiers | 4 |
Secondary Treatment - Activated sludge: Diffused or dispersed aeration | 10 |
Secondary Treatment - Secondary clarifiers | 4 |
Advanced Waste Treatment - Granular media filtration | 8 |
Advanced Waste Treatment - Nitrification by extended aeration only | 2 |
Advanced Waste Treatment - pH adjustment | 3 |
In-plant Odor Control - Adsorption with activated carbon or equal adsorbent | 3 |
Sludge Thickening and Dewatering - Gravity thickener basin | 3 |
Sludge Thickening and Dewatering - Gravity belt thickener | 4 |
Solids Disposal - Off-site disposal | 1 |
Disinfection - Ultraviolet light | 3 |