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 typical pumped methods.
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 operating price. The relocation also allowed for an improve from 13,000 population to 15,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fantastic screens, a vortex grit removing unit and two 15.5m diameter primary settling tanks adopted 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 and then flows by gravity to re-enter the method upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this crucial responsibility, MMB selected the te-sewpas pulsed air lift pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW responsibility side channel air blower, actuated air management valves, air manifold and control panel housed inside a weatherproof GRP enclosure and is delivered to website 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 allows the frequency and period of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit could be situated close to the tanks that it serves with flexible air supply hoses routed via ducts to each of the desludge chambers. The air delivered is scorching and in consequence there is not any need for thermal lagging or insulation. เกจวัดถังแก๊ส -sewpas unit can serve as much as 4 main 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 utilizing the standard control panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech provided a functional design specification for this objective. The venture was accomplished in October 2019. “We’ve been using the air raise systems of assorted 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 systems instead of typical progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two methods was completed in April 2021.
Significant complete life price savings
The te-sewpas system supplies vital complete life price financial savings when compared to typical pumped methods. For a typical set up serving two tanks, just like the Stocksbridge challenge, primarily based on an estimated 25% reduction in the electrical energy consumption and reduced upkeep requirements, te-sewpas provides a 40% lower capital price and 50% discount in operational cost in comparability with a pumped desludge system.