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 benefits of a pulsed air lift sludge pumping choice in comparability with typical pumped systems.
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 improvement, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working value. The relocation additionally allowed for an upgrade from 13,000 inhabitants to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fine screens, a vortex grit elimination unit and two 15.5m diameter main settling tanks followed by organic remedy 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 primary settlement tanks.
Simple, low opex sludge pumping

For this crucial obligation, MMB chosen the te-sewpas pulsed air carry pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation aspect channel air blower, actuated air management valves, air manifold and management panel housed inside a weatherproof GRP enclosure and is delivered to site totally assembled and examined. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. pressure gauge trerice ราคา 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 making certain constant desludging.
The unit may be positioned 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 is no need for thermal lagging or insulation. Each te-sewpas unit can serve up to four major or humus tanks with typical particular person air delivery hose length 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 integrate the te-sewpas controls into the central PLC and Te-Tech supplied a functional design specification for this function. The venture was accomplished in October 2019. “We’ve been using the air raise techniques 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 strong and we determined to retrofit extra techniques instead of conventional 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 savings

The te-sewpas system supplies important complete life value financial savings when in comparison with typical pumped techniques. For a typical installation serving two tanks, just like the Stocksbridge project, primarily based on an estimated 25% discount within the electrical power consumption and decreased upkeep requirements, te-sewpas offers a 40% lower capital cost and 50% discount in operational value compared to a pumped desludge system.
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