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 advantages of a pulsed air raise sludge pumping option in comparability with 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 temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating value. The relocation also allowed for an upgrade from thirteen,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 main settling tanks followed by organic 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 important obligation, MMB selected the te-sewpas pulsed air carry pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW obligation aspect channel air blower, actuated air control valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to website totally assembled and tested. 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 period of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain consistent desludging.
The unit may be positioned close to the tanks that it serves with flexible air delivery hoses routed via ducts to every of the desludge chambers. The air delivered is hot and as a result there is no want for thermal lagging or insulation. Each te-sewpas unit can serve as a lot as four 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 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 objective. หลักการทํางานของpressuregauge was completed in October 2019. “We’ve been using the air raise systems of varied makes on our sites 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 further systems in place of typical progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two methods was accomplished in April 2021.
Significant entire life price financial savings
The te-sewpas system provides significant whole life value savings when compared to typical pumped methods. For a typical set up serving two tanks, like the Stocksbridge venture, primarily based on an estimated 25% reduction within the electrical power consumption and lowered maintenance requirements, te-sewpas offers a 40% lower capital price and 50% reduction in operational value in comparability with a pumped desludge system.
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