Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air raise sludge pumping choice 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 permit a significant housing development, the transient to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating price. The relocation also allowed for an upgrade from thirteen,000 population to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby nice screens, a vortex grit removing unit and two 15.5m diameter main settling tanks adopted by organic therapy in seven trickling filters with two sixteen.7m humus settlement tanks. Sludge produced in เพชเชอร์เกจ is delivered to a chamber alongside the tanks after which flows by gravity to re-enter the process upstream of the first settlement tanks.
Simple, low opex sludge pumping
For this critical responsibility, MMB selected the te-sewpas pulsed air raise pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation facet channel air blower, actuated air management valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to website fully assembled and examined. Each pulse of air lifts a amount 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 permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and guaranteeing consistent desludging.
The unit can be located close to the tanks that it serves with flexible air delivery hoses routed by way of ducts to every of the desludge chambers. The air delivered is scorching and as a result there is no want for thermal lagging or insulation. Each te-sewpas unit can serve as a lot as 4 main or humus tanks with typical particular person air supply hose size up to 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 management panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech supplied a useful design specification for this objective. The venture was completed in October 2019. “We’ve been utilizing the air raise techniques of varied makes on our sites for the final 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially strong and we decided to retrofit extra systems in place of conventional progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two methods was completed in April 2021.
Significant entire life value financial savings
The te-sewpas system provides vital whole life cost savings when compared to typical pumped methods. For a typical installation serving two tanks, just like the Stocksbridge project, based mostly on an estimated 25% reduction within the electrical energy consumption and decreased maintenance necessities, te-sewpas provides a 40% lower capital value and 50% reduction in operational value compared to a pumped desludge system.