Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air raise sludge pumping possibility compared to 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 major housing growth, the transient to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working value. The relocation additionally allowed for an improve from 13,000 inhabitants to fifteen,000 for the 2030 design horizon.
The new £15.sixty five million works consists of duty/standby fantastic screens, a vortex grit removal unit and two 15.5m diameter main settling tanks followed by biological therapy in seven trickling filters with two 16.7m 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 process upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this important obligation, MMB chosen the te-sewpas pulsed air lift pump system supplied by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation side channel air blower, actuated air management valves, air manifold and management panel housed within a weatherproof GRP enclosure and is delivered to web site totally 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 guaranteeing consistent desludging.
The unit could be situated 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 hot and consequently there is not a want for thermal lagging or insulation. เกจวัดแรงดัน -sewpas unit can serve up to four major or humus tanks with typical particular person air supply hose length as much as 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the 2 humus tanks. Rather than utilizing the standard control panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech provided a practical design specification for this objective. The challenge was completed in October 2019. “We’ve been utilizing the air lift methods of varied makes on our sites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially sturdy and we decided to retrofit extra methods rather than conventional progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two methods was completed in April 2021.
Significant entire life price financial savings
The te-sewpas system supplies significant whole life price savings when in comparison with conventional pumped methods. For a typical set up serving two tanks, just like the Stocksbridge project, based mostly on an estimated 25% discount within the electrical power consumption and reduced upkeep necessities, te-sewpas supplies a 40% decrease capital price and 50% discount in operational price in comparison with a pumped desludge system.
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