Case studies and testimonials
Industrial references
Tackling highly inorganic and greasy primary sludge from glass bottle manufacturing to significantly reduce sludge disposal costs with VOLUTE DUO™
Glass manufacturing, France
- VOLUTE DUO™ Dewatering Press
- Glass
- Primary sludge
- Glass manufacturing, France
This glass bottle manufacturing plant produces wastewater which, after sedimentation, generates sludge with a very high inorganic content (>80%). Additionally, the sludge contains grease that is applied to the molds in the manufacturing process. These characteristics present a challenge for sludge flocculation and dewatering. The client was nevertheless looking for a dewatering solution to reduce the volume of sludge and therefore the costs linked to disposal.
Installation details
The VOLUTE DUO™ screw press was put to the test to prove its dewatering capabilities on this greasy and inorganic sludge. The result is very positive for the customer. Cake dryness over 66% represents a reduction of more than 60% of the total volume of sludge to be disposed of and the excellent filtrate quality allows the water to be reused in the manufacturing process. The design of the VOLUTE DUO™ including a dynamic mixer offers better flocculation efficiency and also reduces polymer dosage.
Wastewater treatment plant conditions and performance data
| Details: | |
|---|---|
| Model: | RVP-241 |
| Sludge type: | Primary sedimented |
| Total solids (TS): | 22.4% |
| Inorganic content: | 81.6% |
| Flow rate: | 0.34 m³/h |
| DS throughput: | 76.3 kg-DS/h |
| Cake solids content: | 66.6% |
| Active poly dosage: | 3.6 g/kg-DS (polymer COEX88) |
| Capture rate: | 99.9% |