Yorkshire Water makes use of Te-Tech air-lift pumping for wastewater duties

Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the benefits of a pulsed air raise sludge pumping option compared to typical pumped systems.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a significant housing improvement, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low operating cost. The relocation also 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 nice screens, a vortex grit removing unit and two 15.5m diameter main settling tanks followed by biological therapy in seven trickling filters with two sixteen.7m humus settlement tanks. Sludge produced in 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 duty, MMB selected the te-sewpas pulsed air carry pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW obligation side channel air blower, actuated air control valves, air manifold and control panel housed inside a weatherproof GRP enclosure and is delivered to website absolutely 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 duration of desludging to be adjusted to allow the sludge to consolidate thus eliminating any potential ‘rat-holing’ and making certain constant desludging.
spmk700 could be located near the tanks that it serves with versatile air delivery hoses routed via ducts to each of the desludge chambers. The air delivered is sizzling and as a result there is no want for thermal lagging or insulation. Each te-sewpas unit can serve up to four major or humus tanks with typical individual air delivery hose size 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 usual control panel, MMB decided to integrate the te-sewpas controls into the central PLC and Te-Tech offered a practical design specification for this function. The project was accomplished in October 2019. “We’ve been using the air lift methods of assorted makes on our websites for the last 20–25 years,” says Yorkshire Water’s Wastewater Asset Planning Sponsor Jan Buczylo, “The te-sewpas is especially strong and we decided to retrofit extra methods rather than typical progressive cavity pumps at both Stillington and Sutton-on-the-Forest.” Installation of these two systems was completed in April 2021.
Significant entire life value financial savings
The te-sewpas system offers vital complete life price savings when in comparison with standard pumped systems. For a typical installation serving two tanks, like the Stocksbridge venture, based mostly on an estimated 25% discount in the electrical power consumption and decreased maintenance necessities, te-sewpas supplies a 40% lower capital value and 50% discount in operational cost compared to a pumped desludge system.
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