Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air lift sludge pumping possibility in comparability with standard pumped methods.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a major housing development, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working cost. The relocation also allowed for an upgrade from thirteen,000 inhabitants to 15,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby nice screens, a vortex grit removal unit and two 15.5m diameter main settling tanks adopted by organic therapy 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 and then flows by gravity to re-enter the method upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical obligation, MMB selected the te-sewpas pulsed air carry pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW responsibility facet channel air blower, actuated air management 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 within the PLC permits the frequency and period of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and guaranteeing consistent desludging.
The unit can be positioned near the tanks that it serves with flexible air delivery hoses routed through 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 as much as four primary or humus tanks with typical particular person 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 2 humus tanks. Rather than utilizing the usual management panel, MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech offered a useful design specification for this purpose. The venture was accomplished in October 2019. “We’ve been utilizing the air lift 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 strong and we determined to retrofit additional techniques rather than conventional progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two techniques was accomplished in April 2021.
เกจวัดแรงดันไนโตรเจนราคา -sewpas system provides important whole life value financial savings when in comparison with standard pumped methods. For a typical installation serving two tanks, like the Stocksbridge challenge, based on an estimated 25% reduction within the electrical power consumption and lowered maintenance necessities, te-sewpas provides a 40% lower capital value and 50% discount in operational price compared to a pumped desludge system.
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