Yorkshire Water makes use of Te-Tech air-lift pumping for wastewater duties

Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air carry sludge pumping possibility compared to conventional pumped systems.
A te-sewpas unit at Stocksbridge.
When เกจวัดco2 decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a significant housing improvement, 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 population to 15,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fine screens, a vortex grit removing unit and two 15.5m diameter main settling tanks followed by biological treatment 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 process upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this crucial duty, MMB selected the te-sewpas pulsed air raise pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW duty aspect channel air blower, actuated air control valves, air manifold and management panel housed inside a weatherproof GRP enclosure and is delivered to website absolutely assembled and examined. เกจวัดแรงดูด 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 making certain consistent desludging.
The unit can be located near the tanks that it serves with flexible air supply hoses routed through ducts to each of the desludge chambers. The air delivered is hot and in consequence there isn’t a want for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 primary or humus tanks with typical individual air supply hose length as a lot 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 standard control panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech provided a functional design specification for this purpose. The challenge was completed in October 2019. “We’ve been utilizing the air lift methods 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 extra systems in place of typical progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two methods was accomplished in April 2021.
Significant whole life price savings
The te-sewpas system supplies significant complete life value financial savings when compared to conventional pumped techniques. For a typical installation serving two tanks, just like the Stocksbridge project, based mostly on an estimated 25% reduction within the electrical power consumption and decreased maintenance requirements, te-sewpas supplies a 40% lower capital cost and 50% discount in operational cost compared to a pumped desludge system.
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