Yorkshire Water makes use of Te-Tech air-lift pumping for wastewater duties

Up-sell , Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air carry sludge pumping possibility in comparability with standard pumped methods.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a serious housing improvement, the transient to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working price. The relocation additionally allowed for an improve from 13,000 inhabitants to 15,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby fantastic screens, a vortex grit elimination unit and two 15.5m diameter primary settling tanks followed by organic remedy in seven trickling filters with two 16.7m 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 method upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical duty, 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 control valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to web site absolutely 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 guaranteeing consistent desludging.
The unit may be situated close to the tanks that it serves with flexible air supply hoses routed via ducts to every of the desludge chambers. The air delivered is sizzling and as a result there isn’t a want for thermal lagging or insulation. Each te-sewpas unit can serve as much as 4 major or humus tanks with typical particular person 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 control panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech offered a useful design specification for this purpose. The challenge was completed in October 2019. “We’ve been utilizing the air lift methods 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 particularly strong and we decided to retrofit extra methods instead of standard progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Complete of these two techniques was completed in April 2021.
Significant complete life value financial savings
The te-sewpas system provides vital entire life cost savings when in comparison with typical pumped methods. For a typical set up serving two tanks, like the Stocksbridge project, based on an estimated 25% discount in the electrical energy consumption and reduced upkeep necessities, te-sewpas offers a 40% lower capital price and 50% reduction in operational price in comparability with a pumped desludge system.
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