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 carry sludge pumping possibility compared to standard 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 major housing improvement, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating price. ตัววัดแรงดันน้ำ allowed for an upgrade from thirteen,000 inhabitants 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 main settling tanks followed by biological treatment in seven trickling filters with two sixteen.7m humus settlement tanks. Sludge produced in 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 obligation, MMB chosen the te-sewpas pulsed air lift pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW duty aspect channel air blower, actuated air management valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to website totally assembled and examined. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. A programmable timer within the PLC permits the frequency and period of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit could be situated near the tanks that it serves with versatile air delivery hoses routed through ducts to every of the desludge chambers. เกจแรงดันสูง delivered is scorching and as a result 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 individual air delivery hose size up to 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 determined to combine the te-sewpas controls into the central PLC and Te-Tech offered a useful design specification for this function. The challenge was completed in October 2019. “We’ve been utilizing the air raise methods 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 especially sturdy and we determined to retrofit extra methods rather than conventional progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two methods was completed in April 2021.
Significant entire life value financial savings
The te-sewpas system provides vital complete life value financial savings when compared to conventional pumped methods. For a typical set up serving two tanks, just like the Stocksbridge project, based on an estimated 25% discount within the electrical power consumption and lowered maintenance requirements, te-sewpas offers a 40% decrease capital value and 50% reduction in operational price in comparability with a pumped desludge system.
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