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Yorkshire Water makes use of Te-Tech air-lift pumping for wastewater duties

Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air lift sludge pumping possibility in comparability with standard pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a major housing improvement, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working price. The relocation additionally allowed for an upgrade from thirteen,000 population to 15,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby nice screens, a vortex grit removal unit and two 15.5m diameter main settling tanks followed by biological treatment in seven trickling filters with two 16.7m humus settlement tanks. Sludge produced within the humus settlement tanks is delivered to a chamber alongside the tanks after which flows by gravity to re-enter the process upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical responsibility, MMB selected the te-sewpas pulsed air carry pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW responsibility facet channel air blower, actuated air management valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to website absolutely assembled and tested. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. A programmable timer in the PLC permits the frequency and length of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and guaranteeing constant desludging.
The unit could be positioned near the tanks that it serves with flexible air delivery hoses routed via ducts to every of the desludge chambers. The air delivered is scorching and consequently there is no need for thermal lagging or insulation. Each te-sewpas unit can serve as a lot as four main or humus tanks with typical particular person air delivery hose length up to 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the 2 humus tanks. Rather than using เพชเชอร์เกจ , MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech provided a functional design specification for this purpose. The challenge was completed in October 2019. “We’ve been using the air raise systems of assorted makes on our sites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially robust and we decided to retrofit extra techniques instead of conventional progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of these two systems was accomplished in April 2021.
Significant entire life value financial savings
The te-sewpas system provides significant complete life cost financial savings when compared to conventional pumped techniques. For a typical installation serving two tanks, like the Stocksbridge project, primarily based on an estimated 25% reduction within the electrical energy consumption and decreased maintenance necessities, te-sewpas offers a 40% decrease capital value and 50% reduction in operational cost in comparison with a pumped desludge system.
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