Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air carry sludge pumping choice in comparability with typical pumped methods.
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 brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating value. The relocation additionally allowed for an upgrade from thirteen,000 inhabitants to fifteen,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby fine screens, a vortex grit removal unit and two 15.5m diameter primary settling tanks adopted by biological therapy 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 method 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 provided by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW responsibility side channel air blower, actuated air management valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to web site 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 allows the frequency and period of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit could be situated close to 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 as much as 4 main or humus tanks with typical individual air delivery hose length up to 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the two humus tanks. Rather than utilizing the standard control panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech supplied a functional design specification for this objective. The challenge was accomplished in October 2019. “We’ve been using the air lift systems 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 particularly sturdy and we decided to retrofit extra methods rather than conventional progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two methods was completed in April 2021.
digital pressure gauge -sewpas system supplies important entire life value savings when in comparison with typical pumped methods. For a typical installation serving two tanks, like the Stocksbridge project, based on an estimated 25% reduction within the electrical power consumption and reduced upkeep necessities, te-sewpas offers a 40% lower capital cost and 50% reduction in operational value compared to a pumped desludge system.
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