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 carry sludge pumping choice compared to conventional pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a major housing improvement, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working value. The relocation additionally allowed for an improve from thirteen,000 population to fifteen,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby fine screens, a vortex grit removal unit and two 15.5m diameter major settling tanks adopted by biological therapy 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 process upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this important responsibility, MMB selected the te-sewpas pulsed air raise pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW duty side channel air blower, actuated air control valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to website fully assembled and examined. เกจวัดแรงดันไฮดรอลิค 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 permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and guaranteeing constant desludging.
The unit could be located close to the tanks that it serves with versatile air delivery hoses routed through ducts to every of the desludge chambers. The air delivered is scorching and as a result there is not a want for thermal lagging or insulation. Each te-sewpas unit can serve as a lot as 4 main or humus tanks with typical individual air supply hose length up to 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the two humus tanks. Rather than using the standard management panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech supplied a useful design specification for this objective. The venture was accomplished in October 2019. “We’ve been using the air lift systems 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 strong and we determined to retrofit further systems in place of typical progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two systems was completed in April 2021.
Significant entire life cost financial savings
The te-sewpas system supplies vital complete life value financial savings when in comparability with standard pumped systems. For a typical set up serving two tanks, just like the Stocksbridge project, based mostly on an estimated 25% discount in the electrical power consumption and lowered upkeep requirements, te-sewpas offers a 40% decrease capital price and 50% discount in operational value compared to a pumped desludge system.
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