Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air carry sludge pumping choice compared to standard pumped methods.
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 growth, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working cost. The relocation also allowed for an upgrade from thirteen,000 inhabitants to 15,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fine screens, a vortex grit removing unit and two 15.5m diameter major settling tanks followed by organic remedy 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 and then flows by gravity to re-enter the process upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this crucial responsibility, MMB chosen the te-sewpas pulsed air lift pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW responsibility aspect channel air blower, actuated air control valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to site fully assembled and examined. Each pulse of air lifts a amount of sludge and discharges it from the sludge discharge pipe. เกจวัดแรงดันลมดิจิตอล in the PLC allows the frequency and length of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit may be situated close to the tanks that it serves with flexible air supply hoses routed through ducts to each of the desludge chambers. The air delivered is sizzling and as a result there is no need for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 primary 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 two humus tanks. Rather than using the usual management panel, MMB decided to combine the te-sewpas controls into the central PLC and Te-Tech supplied a useful design specification for this function. The venture was accomplished in October 2019. “We’ve been using the air carry systems of assorted 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 sturdy and we decided to retrofit additional methods rather than standard progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two systems was completed in April 2021.
Significant complete life value financial savings
The te-sewpas system supplies significant entire life value savings when compared to standard pumped methods. For a typical installation serving two tanks, just like the Stocksbridge challenge, based mostly on an estimated 25% discount within the electrical power consumption and decreased upkeep requirements, te-sewpas provides a 40% decrease capital cost and 50% discount in operational value compared to a pumped desludge system.
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