Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air lift sludge pumping choice in comparison with typical pumped techniques.
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 value. The relocation also allowed for an improve from thirteen,000 inhabitants to 15,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby fine screens, a vortex grit elimination unit and two 15.5m diameter primary settling tanks adopted by biological treatment in seven trickling filters with two sixteen.7m humus settlement tanks. Sludge produced within เกจวัดแรงดันไนโตรเจนราคา is delivered to a chamber alongside the tanks after which 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 carry pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW duty aspect channel air blower, actuated air control valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to website absolutely assembled and examined. 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 duration of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit can be located near the tanks that it serves with flexible air supply hoses routed via ducts to every of the desludge chambers. The air delivered is hot and in consequence there is not any want for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 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 usual control panel, MMB decided to combine the te-sewpas controls into the central PLC and Te-Tech supplied a practical design specification for this objective. The venture was accomplished in October 2019. “We’ve been utilizing the air raise techniques of varied 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 strong and we determined to retrofit additional techniques in place of standard progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two techniques was accomplished in April 2021.
Significant whole life price financial savings
The te-sewpas system offers significant entire life price savings when compared to typical pumped systems. For a typical set up serving two tanks, just like the Stocksbridge challenge, based on an estimated 25% reduction in the electrical power consumption and lowered maintenance requirements, te-sewpas offers a 40% decrease capital cost and 50% reduction in operational cost in comparability with a pumped desludge system.
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