Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air lift sludge pumping choice in comparison with 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 major housing development, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working value. The relocation also allowed for an improve from 13,000 population to 15,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby nice screens, a vortex grit removing unit and two 15.5m diameter primary settling tanks adopted by organic treatment 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 after which flows by gravity to re-enter the process upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this important obligation, MMB chosen the te-sewpas pulsed air raise pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW duty 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. compound gauge ราคา of air lifts a amount of sludge and discharges it from the sludge discharge pipe. A programmable timer within the PLC permits the frequency and length of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain constant desludging.
The unit could be located close to the tanks that it serves with versatile air supply hoses routed by way of ducts to each of the desludge chambers. The air delivered is sizzling and in consequence there is not a want for thermal lagging or insulation. Each te-sewpas unit can serve as a lot as four major or humus tanks with typical particular person air supply hose length 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 standard control panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech provided a practical design specification for this function. The project was accomplished in October 2019. “We’ve been utilizing the air carry techniques of assorted 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 determined to retrofit additional systems 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 complete life price savings
The te-sewpas system offers significant entire life cost savings when compared to standard pumped techniques. For a typical set up serving two tanks, like the Stocksbridge project, primarily based on an estimated 25% reduction within the electrical power consumption and reduced upkeep requirements, te-sewpas offers a 40% decrease capital price and 50% reduction in operational cost compared to a pumped desludge system.
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