Sludge dewatering is a critical process in wastewater treatment facilities. The PW Tech Volute Dewatering Press, represented by Envirep in Pennsylvania and surrounding regions, offers a groundbreaking solution that significantly outperforms traditional dewatering methods. Engineered for superior dewatering efficiency, long-term cost-effectiveness, and user-friendly operation, it represents the future of sludge management.

Here’s How The Volute Press Works

Sludge initially enters a mixing tank, where it thoroughly combines with a polymer. Subsequently, the sludge progresses through a flocculation tank, where gentle mixing occurs. From there, it flows into the dewatering drum, where the magic happens. The key to this process lies in the unique dewatering drum itself. This drum achieves both sludge thickening and pressing in a single, streamlined operation. Remarkably, it can handle sludge with concentrations as low as 0.1% solids directly from wastewater treatment processes, such as sequencing batch reactors or oxidation ditches, producing a solid cake with a solids content exceeding 25%.

The Volute Dewatering Press is a screw press, but unlike traditional screw presses, the Volute Dewatering Press features a unique dewatering drum. The constant movement of the moving rings cleans the narrow gaps between the moving and fixed rings, preventing clogging. The moving rings also cut into the sludge cake, allowing additional surface area for the release of water.

In the first part of the drum, the press gently thickens the sludge by removing most of the water. The screw then squeezes the sludge even tighter as it moves towards the end, where it comes out as a dry cake.

Unmatched Operational Efficiency and Low Maintenance

The PW Tech Volute Dewatering Press is designed for ease of operation and minimal maintenance:

• Fully Automated: The system is fully automated, requiring minimal operator attention beyond periodic inspection.
• Reduced Overhaul Frequency: Depending on operating conditions, a partial overhaul of the dewatering drums is typically only necessary every five to ten years. This quick, two-hour operation can be performed on-site with minimal disruption to plant operations.
• Minimal Wear: The enclosed dewatering process operates at speeds under 10 rpm, minimizing wear on components and extending equipment lifespan.

Key Benefits

The Volute Dewatering Press delivers a comprehensive suite of benefits that translate into significant operational improvements and cost savings for wastewater treatment facilities:

• High Cake Solids
• Low Power Usage
• Low Installed Cost
• Low O&M Requirements
• Small Footprint
• Fully Automated
• Reduced Wash Water Consumption
• Minimal Noise, Low Odors

The combined effect of low power and water usage and minimal labor requirements provides ongoing savings and superior environmental performance. An intuitive press control panel conveniently controls the entire operation.

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