Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air raise sludge pumping option compared to typical pumped techniques.
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 development, the brief 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 £15.65 million works consists of duty/standby nice screens, a vortex grit elimination unit and two 15.5m diameter major settling tanks adopted 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 and then flows by gravity to re-enter the process upstream of the primary settlement tanks.
ราคาpressuregauge , low opex sludge pumping
For this critical obligation, MMB chosen the te-sewpas pulsed air carry pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW responsibility aspect channel air blower, actuated air control valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to site totally 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 permits the frequency and duration of desludging to be adjusted to permit 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 flexible air supply hoses routed through ducts to every of the desludge chambers. The air delivered is hot and as a result there is not any need for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 primary or humus tanks with typical individual air delivery hose length 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 usual management 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 challenge was completed in October 2019. “We’ve been utilizing the air raise techniques of various 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 sturdy and we decided to retrofit further techniques in place of conventional progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of those two methods was completed in April 2021.
Significant complete life cost financial savings
The te-sewpas system provides vital complete life value financial savings when in comparability with conventional pumped techniques. For a typical set up serving two tanks, just like the Stocksbridge project, based mostly on an estimated 25% reduction in the electrical energy consumption and lowered upkeep requirements, te-sewpas supplies a 40% decrease capital price and 50% discount in operational price in comparability with a pumped desludge system.
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