Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air lift sludge pumping option compared to conventional pumped techniques.
เกจแรงดัน -sewpas unit at Stocksbridge.
When Yorkshire Water determined 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 price. The relocation also allowed for an upgrade from thirteen,000 population to 15,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fine screens, a vortex grit elimination unit and two 15.5m diameter primary settling tanks followed by organic therapy in seven trickling filters with two 16.7m humus settlement tanks. Sludge produced in the humus settlement tanks 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 important responsibility, MMB selected the te-sewpas pulsed air carry pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW duty side 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 examined. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. A programmable timer within the PLC permits the frequency and length of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit may be situated close to 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 any need 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 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 useful design specification for this objective. The project was completed in October 2019. “We’ve been using the air lift methods of various 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 robust and we decided to retrofit extra methods rather than 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 price savings
The te-sewpas system provides important complete life value savings when compared to typical pumped techniques. For a typical installation serving two tanks, like the Stocksbridge challenge, primarily based on an estimated 25% discount within the electrical power consumption and decreased upkeep necessities, 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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