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 raise sludge pumping option compared to standard pumped techniques.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a serious housing development, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating cost. The relocation additionally 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 removal unit and two 15.5m diameter main settling tanks adopted by biological therapy 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 and then flows by gravity to re-enter the method upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this crucial duty, MMB chosen the te-sewpas pulsed air carry pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW obligation side channel air blower, actuated air control valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to site totally assembled and tested. เกจวัดแรงดันน้ำประปา of air lifts a amount of sludge and discharges it from the sludge discharge pipe. A programmable timer within the PLC allows the frequency and period of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and guaranteeing constant desludging.
The unit can be positioned close to the tanks that it serves with flexible air delivery hoses routed through ducts to each of the desludge chambers. The air delivered is sizzling and consequently there is not a want 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 two 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 utilizing the air lift systems of various makes on our websites for the final 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially strong and we determined to retrofit extra methods rather than typical progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two methods was accomplished in April 2021.
Significant complete life price financial savings
The te-sewpas system provides significant complete life price savings when in comparison with conventional pumped systems. For a typical installation serving two tanks, just like the Stocksbridge venture, based mostly on an estimated 25% reduction in the electrical energy consumption and reduced upkeep necessities, te-sewpas supplies a 40% lower capital value and 50% discount in operational cost in comparability with a pumped desludge system.

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