Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air lift sludge pumping option compared to conventional 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 temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working price. The relocation additionally allowed for an upgrade from 13,000 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 followed by biological therapy 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 process upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this important duty, MMB selected the te-sewpas pulsed air raise pump system provided by Te-Tech Process Solutions. เกจวัดแรงดัน300psi -contained unit incorporates a four.6kW duty side 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 tested. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. A programmable timer in the PLC allows the frequency and length of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain consistent desludging.
The unit could be situated near the tanks that it serves with versatile air supply hoses routed via ducts to every of the desludge chambers. The air delivered is scorching and consequently there is no want for thermal lagging or insulation. Each te-sewpas unit can serve up to four 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 integrate the te-sewpas controls into the central PLC and Te-Tech supplied a functional design specification for this objective. The challenge was accomplished in October 2019. “We’ve been utilizing the air carry techniques of varied makes on our websites for the final 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is particularly robust and we determined to retrofit extra techniques instead of standard progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of these two methods was completed in April 2021.
Significant complete life value savings
The te-sewpas system supplies vital whole life value financial savings when in comparison with standard pumped methods. For a typical installation serving two tanks, just like the Stocksbridge venture, based mostly on an estimated 25% discount within the electrical power consumption and decreased maintenance necessities, te-sewpas offers a 40% decrease capital value and 50% reduction in operational value compared to a pumped desludge system.
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