Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air raise sludge pumping possibility in comparison with conventional 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 improvement, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working price. เกจ์แรงดัน 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 nice screens, a vortex grit removing unit and two 15.5m diameter main settling tanks followed by organic treatment 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 primary settlement tanks.
Simple, low opex sludge pumping
For this critical duty, MMB selected the te-sewpas pulsed air raise pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW obligation side channel air blower, actuated air management valves, air manifold and control panel housed inside a weatherproof GRP enclosure and is delivered to web site fully assembled and examined. Each pulse of air lifts a amount of sludge and discharges it from the sludge discharge pipe. A programmable timer within the PLC permits the frequency and length of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit can be positioned close to the tanks that it serves with versatile air supply hoses routed by way of ducts to every of the desludge chambers. The air delivered is scorching and consequently there is not any want for thermal lagging or insulation. Each te-sewpas unit can serve as much as 4 main or humus tanks with typical individual air supply hose size 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 utilizing the standard control panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech provided a useful design specification for this objective. The challenge was accomplished in October 2019. “We’ve been using the air raise systems of assorted makes on our sites for the final 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is particularly strong and we decided to retrofit extra techniques in place of standard progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two methods was accomplished in April 2021.
Significant entire life cost savings
The te-sewpas system offers vital complete life cost savings when in comparison with standard pumped techniques. For a typical set up serving two tanks, like the Stocksbridge project, based on an estimated 25% reduction within the electrical energy consumption and decreased upkeep requirements, te-sewpas offers a 40% decrease capital price and 50% discount in operational cost compared to a pumped desludge system.