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

เกจวัดแรงดัน1บาร์ , Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air lift sludge pumping option 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 allow a major housing growth, the transient to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating price. The relocation additionally 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 nice screens, a vortex grit removal unit and two 15.5m diameter primary settling tanks followed by organic remedy 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 primary settlement tanks.
Simple, low opex sludge pumping
For this critical obligation, MMB chosen the te-sewpas pulsed air raise pump system supplied 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 website absolutely assembled and examined. 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 period of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit can be located near the tanks that it serves with flexible air delivery hoses routed by way of ducts to each of the desludge chambers. The air delivered is hot and consequently there isn’t a need for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 major or humus tanks with typical individual 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 decided to integrate the te-sewpas controls into the central PLC and Te-Tech provided a functional design specification for this function. The challenge was completed in October 2019. “We’ve been utilizing the air lift systems of various 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 determined to retrofit further systems rather than conventional progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two techniques was completed in April 2021.
Significant complete life value financial savings
The te-sewpas system supplies vital whole life value savings when compared to conventional pumped systems. For a typical installation serving two tanks, like the Stocksbridge venture, primarily based on an estimated 25% reduction in the electrical power consumption and lowered maintenance requirements, te-sewpas supplies a 40% decrease capital cost and 50% discount in operational price in comparison with a pumped desludge system.
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