Yorkshire Water uses 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 raise sludge pumping choice compared to typical 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 serious housing growth, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating price. The relocation also allowed for an improve from thirteen,000 inhabitants to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby nice screens, a vortex grit removing unit and two 15.5m diameter major settling tanks followed by biological therapy 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 method upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this crucial obligation, MMB selected the te-sewpas pulsed air lift pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW obligation facet channel air blower, actuated air management valves, air manifold and control panel housed inside a weatherproof GRP enclosure and is delivered to website fully assembled and examined. 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 duration of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and guaranteeing constant desludging.
The unit could be situated close to the tanks that it serves with versatile air delivery hoses routed via ducts to every of the desludge chambers. เกจวัดแรงดันน้ำมันเครื่อง delivered is scorching and consequently there is no want for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 primary or humus tanks with typical individual air delivery hose length up to 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the two humus tanks. Rather than using the standard control panel, MMB decided to combine the te-sewpas controls into the central PLC and Te-Tech provided a useful design specification for this function. The project was completed in October 2019. “We’ve been utilizing the air lift systems of varied 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 additional methods in place of typical progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two techniques was completed in April 2021.
Significant complete life price financial savings
The te-sewpas system provides vital whole life cost savings when in comparison with conventional pumped methods. For a typical installation serving two tanks, just like the Stocksbridge challenge, based mostly on an estimated 25% discount in the electrical power consumption and lowered upkeep requirements, te-sewpas provides a 40% lower capital cost and 50% discount in operational cost in comparability with a pumped desludge system.

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