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 compared to conventional pumped methods.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a significant housing improvement, the transient to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working cost. The relocation additionally allowed for an upgrade from 13,000 population to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fantastic screens, a vortex grit removing unit and two 15.5m diameter major settling tanks followed by organic treatment in seven trickling filters with two sixteen.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 first settlement tanks.
Simple, low opex sludge pumping
For this critical responsibility, MMB chosen the te-sewpas pulsed air carry pump system supplied by Te-Tech Process Solutions. เกจ์วัดแรงดันน้ำ -contained unit incorporates a four.6kW duty facet channel air blower, actuated air management valves, air manifold and management panel housed inside a weatherproof GRP enclosure and is delivered to website fully 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 making certain constant desludging.
The unit could be positioned near the tanks that it serves with versatile air supply hoses routed by way of ducts to each of the desludge chambers. The air delivered is sizzling and in consequence there is no need for thermal lagging or insulation. Each te-sewpas unit can serve as much as four primary or humus tanks with typical particular person air supply hose length as much as 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the 2 humus tanks. Rather than utilizing the standard management panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech provided a functional design specification for this objective. The challenge was accomplished in October 2019. “We’ve been using the air lift systems of assorted makes on our sites for the final 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is particularly robust and we determined to retrofit additional techniques instead of conventional progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two techniques was completed in April 2021.
Significant entire life price savings
The te-sewpas system offers significant entire life price savings when in comparison with typical pumped techniques. For a typical set up serving two tanks, just like the Stocksbridge venture, based mostly on an estimated 25% reduction in the electrical power consumption and lowered maintenance necessities, te-sewpas supplies a 40% lower capital price and 50% reduction in operational cost in comparison with a pumped desludge system.
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