Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air raise sludge pumping choice in comparability with conventional pumped methods.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a serious housing development, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working cost. เกจวัดแรงดันน้ำ4หุน allowed for an upgrade from thirteen,000 inhabitants to 15,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby fine screens, a vortex grit removing unit and two 15.5m diameter main settling tanks adopted by biological treatment 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 and then flows by gravity to re-enter the method upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical obligation, MMB selected the te-sewpas pulsed air raise pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW responsibility facet channel air blower, actuated air control valves, air manifold and control panel housed inside a weatherproof GRP enclosure and is delivered to site absolutely 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 guaranteeing constant desludging.
The unit can be positioned near the tanks that it serves with flexible air supply hoses routed by way of ducts to every of the desludge chambers. The air delivered is scorching and consequently there is no want for thermal lagging or insulation. Each te-sewpas unit can serve as a lot as 4 major or humus tanks with typical particular person 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 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 venture was accomplished in October 2019. “We’ve been using the air raise techniques of varied makes on our websites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is particularly robust and we decided to retrofit further techniques in place of standard progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of these two techniques was accomplished in April 2021.
Significant complete life cost savings
The te-sewpas system offers significant whole life cost financial savings when compared to typical pumped techniques. For a typical installation serving two tanks, like the Stocksbridge venture, based mostly on an estimated 25% discount in the electrical power consumption and decreased upkeep requirements, te-sewpas supplies a 40% lower capital price and 50% discount in operational price in comparison with a pumped desludge system.
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