High Efficiency QPRESS® Rotary Screw Press Technology for Whangamata STP
The Whangamata and Pauanui STPs were recently upgraded to increase reliability of the Sludge Processing System and also to reduce energy demand and maintenance associated with the existing high speed centrifuges.
HUBER QPRESS® was selected due to its proven track record throughout New Zealand, energy efficiency, high performance and all stainless steel fabrication.
Project Highlights
- Dewatering of thickened waste activated sludge from 3.5 to 20%DS
- Greater than 95% capture
- 90% less power demand over the existing system
- 83% volume reduction
- Commissioned in 2023
Sustainability Highlights
- QPRESS® has been certified by Climate Active (Australia) as Carbon Neutral
- Low energy demand reduces CO2 emissions by 90% as compared to other high-speed technologies
Technology Highlights
- Slow screw speed of 0.2 – 0.7 rpm
- Complete stainless steel fabrication including the base frame and main case
- All enclosed with hinged lids to allow inspection and maintenance
- Triple stage wedgewire basket, clog free design with high durability
- Patented internal wiper has demonstrated greater than 3 year life in ANZ applications
- No need for further downstream treatment of filtrate to achieve 95% capture
QPRESS® is a sludge dewatering technology that results in 85 – 95% volume reduction of liquid sludges produced in water and wastewater treatment, leading to a reduction in transport costs. The unit is available in four sizes to cater for a variety of capacities and a containerised version, HySludge® is also available.
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