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 possibility in comparison with conventional pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a significant housing improvement, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating cost. The relocation also allowed for an improve from thirteen,000 population to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby nice screens, a vortex grit removal unit and two 15.5m diameter main settling tanks followed by biological therapy in seven trickling filters with two 16.7m 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 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 provided by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation side channel air blower, actuated air control valves, air manifold and control panel housed inside a weatherproof GRP enclosure and is delivered to site totally assembled and examined. Each pulse of air lifts a amount of sludge and discharges it from the sludge discharge pipe. A programmable timer in the PLC permits the frequency and period of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain constant desludging.
เกจวัดแรงดันเชื้อเพลิง can be located near the tanks that it serves with flexible air delivery hoses routed by way of ducts to every of the desludge chambers. The air delivered is scorching and in consequence there is not a need for thermal lagging or insulation. Each te-sewpas unit can serve as much as 4 primary or humus tanks with typical individual air supply hose length as much as 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the two humus tanks. Rather than utilizing the standard management panel, MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech offered a practical design specification for this objective. The challenge was completed in October 2019. “We’ve been utilizing the air raise methods of assorted makes on our websites for the final 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially sturdy and we decided to retrofit extra techniques instead of standard progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two techniques was accomplished in April 2021.
Significant complete life cost savings
The te-sewpas system offers vital complete life cost savings when compared to typical pumped methods. For a typical installation serving two tanks, just like the Stocksbridge challenge, based on an estimated 25% discount in the electrical energy consumption and lowered maintenance necessities, te-sewpas supplies a 40% lower capital value and 50% discount in operational cost compared to a pumped desludge system.

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