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Case Study 2
Municipal Treatment with Centrifuge Dewatering
Conventional
activated sludge treatment, with primary 
and secondary clarification and chemical phosphorous removal.
| Population
serviced: |
600,000 |
| Average daily flow: | 100 MIGD(450 MLD) |
| Sludge production: | 30 t/day |
Application
| Equipment: |
High solids Sharples centrifuges |
| Old Mixer: | Direct in-line addition |
| New mixer: | 6” OPTIFLOCTM |
| Flow: | 100 - 130 IGPM (7.5 - 10 L/s) |
| Sludge type: | Anaerobically digested |
| Composition: | 55%
primary 45% secondary |
| Conditioner: | Allied Colloids, dry, cationic |
| Dosages to achieve plant targets of: | Conventional Mixing | Optifloc Mixing |
| Cake Solids ≥ 30% TS | 7.9 kg/t | 7.0 kg/t |
| Centrate TSS ≤ 1000 mg/L | 8.6 kg/t | 6.6 kg/t |
| Cake ≥ 30% TS and Centrate TSS ≤ 1000 mg/L | 8.6 kg/t | 7.0 kg/t |
Copyright
2003 Optifloc Systems