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 lift sludge pumping choice compared to typical 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 major housing development, the transient to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating value. The relocation also allowed for an upgrade from thirteen,000 population to 15,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby nice screens, a vortex grit removal unit and two 15.5m diameter primary settling tanks followed by biological therapy in seven trickling filters with two sixteen.7m humus settlement tanks. Sludge produced in 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 critical responsibility, MMB selected the te-sewpas pulsed air raise pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW responsibility facet 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. 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 duration of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit could be situated near the tanks that it serves with versatile air delivery hoses routed via 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 up to 4 major or humus tanks with typical individual air delivery hose size up to 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 decided to combine the te-sewpas controls into the central PLC and Te-Tech provided a useful design specification for this purpose. The challenge was completed in October 2019. “We’ve been using 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 strong and we determined to retrofit further systems instead of conventional progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two methods was accomplished in April 2021.
nuova fima pressure gauge ราคา -sewpas system supplies significant whole life cost financial savings when in comparability with typical pumped methods. For a typical installation serving two tanks, like the Stocksbridge challenge, based on an estimated 25% reduction within the electrical power consumption and decreased maintenance requirements, te-sewpas provides a 40% lower capital price and 50% discount in operational value compared to a pumped desludge system.
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