ไดอะแฟรม , Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air carry sludge pumping option compared to standard pumped techniques.
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 improvement, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating price. The relocation additionally allowed for an improve from thirteen,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 removal unit and two 15.5m diameter primary settling tanks followed by organic therapy 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 first settlement tanks.
Simple, low opex sludge pumping
For this critical responsibility, MMB chosen the te-sewpas pulsed air lift pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a four.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 web site absolutely 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 duration of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and guaranteeing consistent desludging.
The unit may be situated close to the tanks that it serves with versatile air supply hoses routed through ducts to each of the desludge chambers. The air delivered is hot and as a result there is no want for thermal lagging or insulation. Each te-sewpas unit can serve as much as four major or humus tanks with typical particular person air delivery hose length 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 using the usual control panel, MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech provided a practical design specification for this objective. The challenge was accomplished in October 2019. “We’ve been utilizing the air carry methods of varied 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 extra systems in place of typical progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two methods was completed in April 2021.
Significant whole life cost financial savings
The te-sewpas system provides vital whole life price savings when compared to standard pumped methods. For a typical installation serving two tanks, like the Stocksbridge challenge, based on an estimated 25% discount in the electrical energy consumption and lowered upkeep necessities, te-sewpas supplies a 40% decrease capital cost and 50% discount in operational cost in comparison with a pumped desludge system.
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