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 advantages of a pulsed air carry sludge pumping possibility compared to typical pumped techniques.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a serious housing development, the transient to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working cost. The relocation also allowed for an improve from thirteen,000 population to 15,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby nice screens, a vortex grit removal unit and two 15.5m diameter main settling tanks adopted by organic remedy 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 and then flows by gravity to re-enter the process upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this crucial obligation, MMB chosen the te-sewpas pulsed air lift pump system supplied by Te-Tech Process Solutions. เกจวัดแรงดันดิจิตอล -contained unit incorporates a 4.6kW duty side channel air blower, actuated air management valves, air manifold and management 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 allows the frequency and duration of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and guaranteeing consistent desludging.
The unit could be located near the tanks that it serves with versatile air supply hoses routed via ducts to each of the desludge chambers. The air delivered is sizzling and as a result there is no want for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 major or humus tanks with typical particular person air delivery hose size as a lot as 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the 2 humus tanks. Rather than utilizing the usual management panel, MMB decided to combine the te-sewpas controls into the central PLC and Te-Tech offered a useful design specification for this purpose. The challenge was accomplished in October 2019. “We’ve been utilizing the air carry systems of assorted makes on our websites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is particularly robust and we determined to retrofit additional systems in place of conventional progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of these two techniques was completed in April 2021.
Significant whole life cost financial savings
The te-sewpas system supplies important entire life price financial savings when compared to conventional pumped techniques. For a typical set up serving two tanks, just like the Stocksbridge challenge, based mostly on an estimated 25% reduction in the electrical energy consumption and reduced maintenance necessities, te-sewpas provides a 40% decrease capital cost and 50% discount in operational value in comparability with a pumped desludge system.
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