Yorkshire Water uses Te-Tech air-lift pumping for wastewater duties

Forbidden , Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air carry sludge pumping option compared to typical pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a major housing growth, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working cost. The relocation also allowed for an improve from thirteen,000 inhabitants to 15,000 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 main settling tanks followed by organic 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 method upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical responsibility, MMB chosen the te-sewpas pulsed air raise pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW responsibility aspect channel air blower, actuated air management valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to site absolutely assembled and examined. Each pulse of air lifts a amount 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 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 versatile air delivery hoses routed by way of ducts to every of the desludge chambers. The air delivered is sizzling and in consequence there is not any need for thermal lagging or insulation. Each te-sewpas unit can serve as much as four primary or humus tanks with typical individual air supply hose size 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 using the usual control panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech supplied a practical design specification for this function. The venture was completed in October 2019. “We’ve been using the air lift techniques 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 decided to retrofit additional methods instead of standard progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two methods was accomplished in April 2021.
Significant entire life value savings
The te-sewpas system offers significant whole life value financial savings when compared to conventional pumped methods. For a typical set up serving two tanks, just like the Stocksbridge challenge, primarily based on an estimated 25% discount in the electrical energy consumption and lowered maintenance requirements, te-sewpas supplies a 40% lower capital cost and 50% discount in operational price in comparability with a pumped desludge system.
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