Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air lift sludge pumping option compared to conventional pumped methods.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to allow a serious housing development, 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 15,000 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 main settling tanks followed by organic treatment 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 first settlement tanks.
Simple, low opex sludge pumping

For this critical duty, MMB chosen the te-sewpas pulsed air raise pump system provided by Te-Tech Process Solutions. เกจวัดแรงดัน -contained unit incorporates a 4.6kW responsibility facet channel air blower, actuated air management valves, air manifold and management panel housed inside a weatherproof GRP enclosure and is delivered to site fully assembled and examined. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. A programmable timer in the PLC allows the frequency and duration of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain consistent desludging.
The unit can be located near the tanks that it serves with versatile air delivery hoses routed by way of ducts to each of the desludge chambers. The air delivered is sizzling and in consequence there is no need for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 primary or humus tanks with typical particular person air supply hose size as much 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 standard control panel, MMB determined to combine the te-sewpas controls into the central PLC and Te-Tech offered a practical design specification for this objective. The venture was accomplished in October 2019. “We’ve been utilizing the air lift systems 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 robust and we determined to retrofit extra systems instead of conventional progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” pressure gauge of those two techniques was accomplished in April 2021.
pressure gauge 10 bar -sewpas system provides significant whole life price savings when in comparability with typical pumped methods. For a typical set up serving two tanks, just like the Stocksbridge challenge, based on an estimated 25% discount within the electrical energy consumption and lowered upkeep requirements, te-sewpas offers a 40% decrease capital price and 50% discount in operational value in comparison with a pumped desludge system.
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