Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air lift sludge pumping possibility compared to standard pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a serious housing growth, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating price. The relocation also allowed for an improve from 13,000 population to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fine screens, a vortex grit removal unit and two 15.5m diameter main settling tanks adopted by organic remedy in seven trickling filters with two 16.7m humus settlement tanks. Sludge produced in เกจวัดแรงดัน 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 crucial duty, MMB chosen the te-sewpas pulsed air raise pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation facet channel air blower, actuated air management valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to site 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 period of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring consistent desludging.
The unit can be located near the tanks that it serves with versatile air supply hoses routed by way of ducts to every of the desludge chambers. The air delivered is sizzling and consequently there is not a want for thermal lagging or insulation. Each te-sewpas unit can serve as much as four major or humus tanks with typical particular person air supply hose size 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 using the usual control panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech supplied a practical design specification for this purpose. The challenge was accomplished in October 2019. “We’ve been utilizing the air carry systems 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 especially robust 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 completed in April 2021.
Significant complete life value savings
The te-sewpas system provides important complete life cost financial savings when compared to typical pumped techniques. For a typical set up serving two tanks, like the Stocksbridge challenge, 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 compared to a pumped desludge system.
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