Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air carry sludge pumping option compared to standard pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a significant housing development, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating value. The relocation additionally allowed for an upgrade from 13,000 population to 15,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby fine screens, a vortex grit elimination unit and two 15.5m diameter main settling tanks adopted by biological remedy 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 after which 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 equipped by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW duty aspect channel air blower, actuated air management valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to website 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 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 can be situated close to the tanks that it serves with flexible air supply hoses routed through ducts to every of the desludge chambers. The air delivered is hot and in consequence there is not a want for thermal lagging or insulation. Each te-sewpas unit can serve as a lot as four primary or humus tanks with typical individual air delivery hose length as much as 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 determined to integrate the te-sewpas controls into the central PLC and Te-Tech offered a useful design specification for this objective. The project was completed in October 2019. “We’ve been using 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 strong and we determined to retrofit extra systems rather than conventional progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two systems was completed in April 2021.
Significant whole life price financial savings
The te-sewpas system offers vital whole life price savings when in comparison with conventional pumped methods. For จำหน่ายเกจวัดแรงดัน serving two tanks, like the Stocksbridge venture, based on an estimated 25% reduction in the electrical energy consumption and decreased maintenance necessities, te-sewpas provides a 40% lower capital value and 50% reduction in operational price in comparability with a pumped desludge system.
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