Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air carry sludge pumping option in comparability with standard pumped methods.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water determined 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 additionally allowed for an improve from 13,000 inhabitants to fifteen,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby fine screens, a vortex grit removal unit and two 15.5m diameter major settling tanks adopted by biological treatment in seven trickling filters with two sixteen.7m humus settlement tanks. Sludge produced within the humus settlement tanks is delivered to a chamber alongside the tanks after which flows by gravity to re-enter the method upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical obligation, MMB chosen the te-sewpas pulsed air lift pump system provided by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW responsibility aspect channel air blower, actuated air management valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to site totally 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 permits the frequency and duration of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring consistent desludging.
The unit may be positioned near the tanks that it serves with versatile air delivery hoses routed by way of ducts to every of the desludge chambers. The air delivered is hot and as a result there is not a need for thermal lagging or insulation. Each te-sewpas unit can serve up to four main or humus tanks with typical particular person air delivery hose size up to 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the 2 humus tanks. Rather than utilizing the usual management panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech supplied a functional design specification for this objective. The challenge was completed in October 2019. “ ชนิดของpressuregauge ’ve been using the air raise techniques of various makes on our sites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is particularly strong and we decided to retrofit further methods in place of typical progressive cavity pumps at each 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 supplies vital entire life price financial savings when compared to typical pumped techniques. For a typical set up serving two tanks, like the Stocksbridge challenge, primarily based on an estimated 25% discount in the electrical power consumption and lowered upkeep requirements, te-sewpas offers a 40% lower capital price and 50% discount in operational value in comparison with a pumped desludge system.
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