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Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air raise sludge pumping choice compared to typical 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 serious housing growth, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating cost. The relocation additionally allowed for an upgrade from thirteen,000 population 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 main settling tanks followed 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 after which flows by gravity to re-enter the method upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this crucial duty, MMB selected the te-sewpas pulsed air raise pump system provided by Te-Tech Process Solutions. digital pressure gauge ราคา -contained unit incorporates a four.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 web 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 may be situated close to the tanks that it serves with flexible air delivery hoses routed through ducts to each of the desludge chambers. The air delivered is sizzling and in consequence there isn’t a want 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 length up to 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the two humus tanks. Rather than utilizing the usual control panel, MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech provided a useful design specification for this objective. The venture was accomplished in October 2019. “We’ve been utilizing the air lift methods of varied makes on our websites for the final 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially robust and we decided to retrofit extra methods rather than conventional progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two techniques was completed in April 2021.
Significant complete life price financial savings
The te-sewpas system provides important complete life price financial savings when compared to conventional pumped systems. For a typical set up serving two tanks, like the Stocksbridge challenge, based mostly on an estimated 25% reduction in the electrical energy consumption and decreased maintenance requirements, te-sewpas offers a 40% lower capital price and 50% discount in operational cost compared to a pumped desludge system.
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