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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 benefits of a pulsed air lift sludge pumping option in comparison with conventional 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 also allowed for an upgrade from 13,000 population to 15,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby nice screens, a vortex grit removing unit and two 15.5m diameter main settling tanks adopted by biological therapy in seven trickling filters with two sixteen.7m humus settlement tanks. Sludge produced within ราคาเกจวัดแรงดันน้ำ 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 important duty, MMB selected the te-sewpas pulsed air lift pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW responsibility side channel air blower, actuated air management valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to web 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 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 ensuring consistent desludging.
The unit may be situated close to the tanks that it serves with versatile air supply hoses routed by way of ducts to each of the desludge chambers. The air delivered is sizzling and in consequence there is no want for thermal lagging or insulation. Each te-sewpas unit can serve as much as four primary or humus tanks with typical individual air delivery hose length as a lot as 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the 2 humus tanks. Rather than utilizing the standard management panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech supplied a practical design specification for this objective. The project was accomplished in October 2019. “We’ve been utilizing the air lift techniques 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 sturdy and we decided to retrofit further systems in place of typical progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of these two systems was completed in April 2021.
Significant entire life cost savings
The te-sewpas system provides vital entire life cost savings when compared to typical pumped systems. For a typical set up serving two tanks, just like the Stocksbridge project, primarily based on an estimated 25% discount within the electrical energy consumption and lowered upkeep requirements, te-sewpas provides a 40% lower capital cost and 50% discount in operational price in comparison with a pumped desludge system.
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