Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air raise sludge pumping possibility compared to typical 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 price. The relocation also allowed for an improve from 13,000 inhabitants 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 major settling tanks followed by organic therapy in seven trickling filters with two sixteen.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 process upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical responsibility, MMB chosen the te-sewpas pulsed air carry pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW obligation side channel air blower, actuated air control valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to site fully 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 can be situated close to the tanks that it serves with versatile air delivery hoses routed through ducts to each of the desludge chambers. The air delivered is hot and as a result there is not any want for thermal lagging or insulation. Each te-sewpas unit can serve as a lot as 4 main 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 two humus tanks. Rather than utilizing the standard management panel, MMB decided to combine the te-sewpas controls into the central PLC and Te-Tech provided a practical design specification for this purpose. The venture was completed in October 2019. “We’ve been utilizing the air carry 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 particularly sturdy and we determined to retrofit further methods rather than standard progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” pressure gauge ไฮ ด รอ ลิ ค of these two techniques was accomplished in April 2021.
Significant whole life value financial savings
The te-sewpas system supplies important complete life price financial savings when compared to typical pumped methods. For a typical installation serving two tanks, just like the Stocksbridge project, primarily based on an estimated 25% reduction in the electrical energy consumption and reduced upkeep necessities, te-sewpas offers a 40% lower capital value and 50% discount in operational value compared to a pumped desludge system.
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