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 advantages of a pulsed air raise sludge pumping choice in comparability with conventional pumped methods.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a significant housing growth, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating cost. 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 elimination unit and two 15.5m diameter primary 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 and then flows by gravity to re-enter the process upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this important obligation, MMB selected the te-sewpas pulsed air lift pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation aspect channel air blower, actuated air control valves, air manifold and management panel housed within 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 period of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain constant desludging.
The unit could be situated near the tanks that it serves with flexible air supply hoses routed via ducts to every of the desludge chambers. The air delivered is scorching and as a result there is not a want for thermal lagging or insulation. Each te-sewpas unit can serve up to four primary or humus tanks with typical particular person air delivery hose size as much as 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the two humus tanks. Rather than utilizing the usual management panel, MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech supplied a practical design specification for this purpose. เกจวัดแรงดันไฮดรอลิค was accomplished in October 2019. “We’ve been utilizing the air lift systems of varied makes on our websites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially sturdy and we decided to retrofit additional methods in place of standard progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two techniques was completed in April 2021.
Significant complete life cost financial savings
The te-sewpas system provides significant complete life cost financial savings when compared to standard pumped methods. For a typical installation serving two tanks, just like the Stocksbridge venture, primarily based on an estimated 25% reduction in the electrical energy consumption and reduced maintenance necessities, te-sewpas provides a 40% decrease capital cost and 50% reduction in operational cost compared to a pumped desludge system.

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