Size (Peak day design capacity, gallons per day) - 100,001 - 500,000 | 9 |
Pretreatment - Flow equalization basin | 1 |
Pretreatment - Mechanically cleaned screens | 2 |
Pretreatment - Comminutor, barminutor, grinders | 2 |
Secondary Treatment - Activated sludge: Diffused or dispersed aeration | 10 |
Secondary Treatment - Activated bio-filter without aeration | 8 |
Secondary Treatment - Secondary clarifiers | 4 |
Advanced Waste Treatment - Chemical and physical treatment following secondary treatment | 15 |
Advanced Waste Treatment - Biological or combined chemical and biological nutrient removal | 12 |
Solids Disposal - Off-site disposal | 1 |
Disinfection - Liquid and powdered hypochlorites | 3 |
Disinfection - Additional points if hypochlorites are generated on-site | 2 |
Effluent Discharge - Plant pumping of effluent | 2 |