Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air carry sludge pumping choice in comparability with standard pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a significant housing development, the transient 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 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 major settling tanks adopted by biological treatment in seven trickling filters with two sixteen.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 primary settlement tanks.
Simple, low opex sludge pumping
For this critical duty, MMB selected the te-sewpas pulsed air raise pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW responsibility aspect channel air blower, actuated air control valves, air manifold and management panel housed inside a weatherproof GRP enclosure and is delivered to site absolutely assembled and tested. Each pulse of air lifts a amount of sludge and discharges it from the sludge discharge pipe. A programmable timer within the PLC allows the frequency and period of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and guaranteeing constant desludging.
The unit may be positioned near the tanks that it serves with versatile air supply hoses routed via ducts to each of the desludge chambers. The air delivered is hot and consequently there is no need for thermal lagging or insulation. Each te-sewpas unit can serve up to four primary or humus tanks with typical particular person air delivery 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 using the standard control panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech offered a useful design specification for this purpose. The project was completed in October 2019. “We’ve been using the air lift techniques of varied makes on our sites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially sturdy and we determined to retrofit extra systems instead of typical progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two systems was completed in April 2021.
Significant entire life value savings
The te-sewpas system offers vital whole life cost savings when compared to conventional pumped systems. For เกจ์วัดแก๊สหุงต้ม up serving two tanks, just like the Stocksbridge venture, based on an estimated 25% reduction in the electrical power consumption and lowered upkeep requirements, te-sewpas supplies a 40% lower capital price and 50% reduction in operational value in comparison with a pumped desludge system.
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