Yorkshire Water uses Te-Tech air-lift pumping for wastewater duties

Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air raise sludge pumping option in comparison with typical pumped methods.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a significant housing growth, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating cost. The relocation also allowed for an upgrade from thirteen,000 inhabitants 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 primary 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 and then flows by gravity to re-enter the process upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical duty, MMB selected the te-sewpas pulsed air lift pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation facet channel air blower, actuated air management valves, air manifold and control panel housed inside a weatherproof GRP enclosure and is delivered to site totally 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 allows the frequency and duration 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 located close to the tanks that it serves with versatile air delivery hoses routed via ducts to every of the desludge chambers. The air delivered is hot and in consequence 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 individual air delivery hose size 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 utilizing เกจวัดแรงดันลม , MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech provided a practical design specification for this objective. The venture was completed in October 2019. “We’ve been utilizing the air lift techniques of various 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 decided to retrofit further methods rather than typical progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of these two systems was accomplished in April 2021.
Significant entire life price financial savings
The te-sewpas system supplies vital complete life price financial savings when compared to conventional pumped methods. For a typical set up serving two tanks, like the Stocksbridge challenge, based mostly on an estimated 25% discount within the electrical energy consumption and lowered maintenance requirements, te-sewpas provides a 40% decrease capital value and 50% reduction in operational value in comparability with a pumped desludge system.

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