Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air raise sludge pumping option in comparison with standard pumped systems.
A te-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 additionally allowed for an upgrade from thirteen,000 population to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fantastic screens, a vortex grit removing unit and two 15.5m diameter primary settling tanks followed by organic treatment 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 primary settlement tanks.
Simple, low opex sludge pumping
For this important obligation, MMB chosen the te-sewpas pulsed air raise pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW obligation aspect channel air blower, actuated air control valves, air manifold and management panel housed inside a weatherproof GRP enclosure and is delivered to website fully assembled and examined. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. A programmable timer in the PLC permits the frequency and duration of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain consistent desludging.
The unit can be positioned near the tanks that it serves with versatile air delivery hoses routed via ducts to every of the desludge chambers. The air delivered is scorching and as a result there is not a want for thermal lagging or insulation. Each te-sewpas unit can serve up to four primary or humus tanks with typical individual air supply hose size up to 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the 2 humus tanks. Rather than using the usual control panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech provided a functional design specification for this objective. เกจวัดแรงดันpsi was accomplished in October 2019. “We’ve been utilizing the air carry methods of assorted makes on our websites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially robust and we decided to retrofit further methods in place of conventional progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two techniques was completed in April 2021.
Significant complete life value financial savings
The te-sewpas system offers significant whole life value savings when compared to conventional pumped systems. For a typical set up serving two tanks, like the Stocksbridge venture, primarily based on an estimated 25% discount within the electrical energy consumption and reduced upkeep necessities, te-sewpas provides a 40% lower capital cost and 50% discount in operational value in comparability with a pumped desludge system.
Share