Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air raise sludge pumping possibility compared to standard pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a major housing growth, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating price. เกจแรงดันลม allowed for an improve from thirteen,000 population to fifteen,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby fantastic screens, a vortex grit removing unit and two 15.5m diameter main settling tanks followed by biological treatment in seven trickling filters with two sixteen.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 critical responsibility, MMB selected the te-sewpas pulsed air lift pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW duty aspect channel air blower, actuated air management valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to site totally assembled and tested. Each pulse of air lifts a amount of sludge and discharges it from the sludge discharge pipe. A programmable timer in the PLC allows the frequency and period of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain consistent desludging.
The unit may be situated 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 as a result there is not a need for thermal lagging or insulation. Each te-sewpas unit can serve up to four main or humus tanks with typical particular person air supply hose length 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 management panel, MMB decided to combine the te-sewpas controls into the central PLC and Te-Tech offered a functional design specification for this function. The project was completed in October 2019. “We’ve been using the air lift techniques of varied 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 determined to retrofit extra methods rather than conventional 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 savings
The te-sewpas system provides important complete life price financial savings when compared to typical pumped methods. For a typical set up serving two tanks, like the Stocksbridge challenge, based on an estimated 25% reduction within the electrical energy consumption and decreased upkeep necessities, te-sewpas offers a 40% decrease capital value and 50% reduction in operational value compared to a pumped desludge system.
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