ENVIRONMENTA WWTP applied a screw press 403 to treat DAF scum sludge. Here are the operating conditions and the cost analysis.
Operating cost analysis
| Item | Basis | Reference price | USD/kg dry solids |
|---|---|---|---|
| Labour | One operator | USD 700/month | 0.0049 |
| Power | 5.6 kW | USD 0.13/kWh | 0.0017 |
| Polymer | 3 kg/tonne dry solids | USD 2,800/tonne | 0.0084 |
| Water | 96 L/h | USD 0.50/m³ | 0.00006 |
Total Operating Cost
Total OPEX ≈ 0.015 USD/kg-DS = ~15 USD per ton-DS
Key Takeaways
- Even with DAF scum at 3.5% DS, screw press 403 maintains very low OPEX in this application.
- Polymer control and regular maintenance are crucial for stable cake dryness and cost reduction.
- Actual OPEX will vary depending on sludge type and the screw press model used.
- At G-LINK, we supply the equipment and coordinate support from equipment selection and polymer recommendations to maintenance guidance, helping clients improve efficiency and reduce lifecycle cost.
Welcome to consult with us if you would like to discuss your own sludge application.
All values use China-based reference prices (labour 700 USD/month, polymer 2,800 USD/ton, power 0.13 USD/kWh, water 0.5 USD/m³). Actual costs should be adjusted according to local tariffs and procurement costs.