Yorkshire Water uses Te-Tech air-lift pumping for wastewater duties

เครื่องมือที่ใช้วัดความดัน , Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air lift sludge pumping option in comparability with 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 significant housing growth, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working price. The relocation additionally allowed for an improve from thirteen,000 inhabitants to 15,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fine screens, a vortex grit removal unit and two 15.5m diameter major settling tanks followed by biological 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 duty, MMB chosen the te-sewpas pulsed air lift pump system provided 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 control panel housed within a weatherproof GRP enclosure and is delivered to site absolutely 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 allows the frequency and period 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 located near the tanks that it serves with flexible air delivery hoses routed via ducts to every of the desludge chambers. The air delivered is scorching and as a result there is not any need 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 using the standard management panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech offered a practical design specification for this objective. The venture was completed in October 2019. “We’ve been using the air raise systems of assorted makes on our sites for the final 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is particularly sturdy and we determined to retrofit additional methods instead of standard progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two methods was accomplished in April 2021.
Significant entire life cost financial savings
The te-sewpas system provides significant whole life cost financial savings when compared to typical pumped methods. For a typical set up serving two tanks, just like the Stocksbridge venture, based on an estimated 25% reduction within the electrical power consumption and reduced upkeep requirements, te-sewpas offers a 40% decrease capital cost and 50% reduction in operational price in comparability with a pumped desludge system.
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