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 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 allow a major housing development, the brief to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working value. The relocation also allowed for an upgrade from thirteen,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 removal unit and two 15.5m diameter major settling tanks followed by organic 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 and then flows by gravity to re-enter the process upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this critical responsibility, MMB chosen the te-sewpas pulsed air raise pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW duty aspect channel air blower, actuated air management valves, air manifold and control panel housed within a weatherproof GRP enclosure and is delivered to website totally assembled and examined. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. เกจวัดแรงดันsumo 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 making certain consistent desludging.
The unit can be located close to the tanks that it serves with flexible air delivery hoses routed through ducts to every of the desludge chambers. The air delivered is sizzling and consequently there isn’t any need for thermal lagging or insulation. Each te-sewpas unit can serve as much as 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 two humus tanks. Rather than using 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 purpose. The venture was accomplished in October 2019. “We’ve been using the air lift techniques of assorted 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 strong and we determined to retrofit extra techniques 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 value financial savings
The te-sewpas system offers significant entire life value financial 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 power consumption and lowered maintenance requirements, te-sewpas provides a 40% lower capital price and 50% reduction in operational value compared to a pumped desludge system.
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