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 typical pumped techniques.
A te-sewpas unit at Stocksbridge.
When เกจวัดแรงดันน้ำประปา determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a significant housing improvement, the transient 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 £15.65 million works consists of duty/standby nice 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 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 crucial duty, MMB chosen the te-sewpas pulsed air carry pump system supplied 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 control panel housed within a weatherproof GRP enclosure and is delivered to site totally assembled and examined. Each pulse of air lifts a amount 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 near the tanks that it serves with versatile air delivery hoses routed through ducts to every of the desludge chambers. The air delivered is hot and consequently there is not a need for thermal lagging or insulation. Each te-sewpas unit can serve up to four primary 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 usual management panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech offered a useful design specification for this purpose. The venture was completed in October 2019. “We’ve been using the air raise techniques of various makes on our sites for the final 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially strong and we decided to retrofit additional techniques rather than standard progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of these two methods was completed in April 2021.
Significant entire life cost financial savings
The te-sewpas system supplies important entire life value financial savings when in comparability with conventional pumped methods. For a typical set up serving two tanks, like the Stocksbridge venture, based on an estimated 25% reduction in the electrical energy consumption and decreased maintenance necessities, te-sewpas supplies a 40% lower capital cost and 50% reduction in operational cost compared to a pumped desludge system.
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