ราคาเพรสเชอร์เกจ , Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air raise sludge pumping choice compared to conventional pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a significant housing growth, the transient to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating cost. The relocation additionally allowed for an improve from 13,000 population to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fine screens, a vortex grit elimination unit and two 15.5m diameter primary settling tanks followed by biological therapy in seven trickling filters with two 16.7m humus settlement tanks. Sludge produced in the humus settlement tanks 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 crucial obligation, MMB chosen the te-sewpas pulsed air raise pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation side 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 examined. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. A programmable timer within the PLC allows the frequency and length of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain constant desludging.
The unit may be located close to the tanks that it serves with versatile air delivery hoses routed through ducts to every of the desludge chambers. The air delivered is sizzling and consequently there isn’t a need for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 main or humus tanks with typical individual 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 using the usual control panel, MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech provided a useful design specification for this purpose. The challenge was completed in October 2019. “We’ve been utilizing the air lift methods of varied makes on our websites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is particularly robust and we decided to retrofit additional systems in place of standard progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two techniques was accomplished in April 2021.
Significant complete life value savings
The te-sewpas system supplies important complete life price savings when compared to typical pumped systems. For a typical installation serving two tanks, just like the Stocksbridge challenge, primarily based on an estimated 25% discount within the electrical energy consumption and decreased upkeep requirements, te-sewpas supplies a 40% decrease capital value and 50% reduction in operational cost compared to a pumped desludge system.
Share