Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air carry sludge pumping possibility in comparability with typical pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a major housing improvement, the transient to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working cost. The relocation also allowed for an improve from 13,000 inhabitants to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fine screens, a vortex grit removal unit and two 15.5m diameter primary settling tanks adopted by biological remedy 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 and then flows by gravity to re-enter the method upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical responsibility, MMB selected the te-sewpas pulsed air lift pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW duty side channel air blower, actuated air control valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to site absolutely assembled and tested. Each pulse of air lifts a amount 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 ensuring consistent desludging.
The unit may be situated near the tanks that it serves with versatile air delivery hoses routed via ducts to each of the desludge chambers. The air delivered is hot and consequently there isn’t any need for thermal lagging or insulation. Each te-sewpas unit can serve as a lot as 4 primary or humus tanks with typical particular person air delivery hose length 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 control panel, MMB decided to combine the te-sewpas controls into the central PLC and Te-Tech provided a useful design specification for this function. The venture was completed in October 2019. “We’ve been utilizing the air lift methods of assorted 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 determined to retrofit further methods instead of typical progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of these two systems was accomplished in April 2021.
Significant complete life price financial savings
The te-sewpas system offers vital entire life cost savings when compared to standard pumped techniques. For เกจวัดแรงดัน250bar up serving two tanks, like the Stocksbridge venture, primarily based on an estimated 25% reduction in the electrical energy consumption and decreased upkeep requirements, te-sewpas provides a 40% lower capital cost and 50% discount in operational cost in comparability with a pumped desludge system.