Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air carry sludge pumping option in comparability with conventional pumped techniques.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided 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 price. เกจวัดแรงดันเชื้อเพลิง allowed for an improve from 13,000 inhabitants to 15,000 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 primary settling tanks followed by biological remedy 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 and then flows by gravity to re-enter the method upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical responsibility, MMB selected the te-sewpas pulsed air carry pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW duty side channel air blower, actuated air control valves, air manifold and control panel housed inside a weatherproof GRP enclosure and is delivered to website totally assembled and examined. 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 permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring 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 sizzling and in consequence there is no need for thermal lagging or insulation. Each te-sewpas unit can serve up to four primary or humus tanks with typical particular person air delivery hose size up to 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the two humus tanks. Rather than using the standard management panel, MMB decided to combine the te-sewpas controls into the central PLC and Te-Tech offered a practical design specification for this function. The challenge was completed in October 2019. “We’ve been utilizing the air lift systems 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 sturdy and we decided to retrofit further methods rather than typical progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of these two systems was completed in April 2021.
Significant whole life value savings
The te-sewpas system provides vital whole life cost financial savings when compared to conventional pumped techniques. For a typical set up serving two tanks, just like the Stocksbridge challenge, based on an estimated 25% reduction in the electrical energy consumption and reduced maintenance requirements, te-sewpas offers a 40% lower capital value and 50% discount in operational value in comparability with a pumped desludge system.
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