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

เกจอาร์กอน , Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air raise sludge pumping option in comparison with conventional pumped techniques.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a major housing growth, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working value. The relocation also allowed for an upgrade from thirteen,000 inhabitants to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fantastic screens, a vortex grit removal unit and two 15.5m diameter main settling tanks followed by biological 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 after which flows by gravity to re-enter the method upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this critical duty, MMB chosen the te-sewpas pulsed air carry pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation facet channel air blower, actuated air control valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to web site totally 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 length 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 positioned near the tanks that it serves with versatile air delivery hoses routed via ducts to every of the desludge chambers. The air delivered is scorching and consequently there is not a want 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 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 using the usual control panel, MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech offered a useful design specification for this function. The venture was completed in October 2019. “We’ve been using the air raise methods 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 decided to retrofit extra methods in place of conventional progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two techniques was completed in April 2021.
Significant entire life cost financial savings
The te-sewpas system offers vital whole life value financial savings when in comparability with conventional pumped systems. For a typical set up serving two tanks, just like the Stocksbridge challenge, based on an estimated 25% discount in the electrical energy consumption and lowered upkeep necessities, te-sewpas offers a 40% lower capital cost and 50% discount in operational price in comparison with a pumped desludge system.
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