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

Value , Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air lift sludge pumping option in comparability with standard pumped techniques.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided to relocate Stocksbridge Wastewater Treatment Works 2km to the south to permit a major housing growth, the temporary to Mott MacDonald Bentley (MMB) was for reliability, sustainability and low working value. The relocation additionally allowed for an upgrade from 13,000 inhabitants to 15,000 for the 2030 design horizon.
The new £15.65 million works consists of duty/standby fine screens, a vortex grit removing unit and two 15.5m diameter primary settling tanks adopted by biological 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 method upstream of the primary settlement tanks.
Simple, low opex sludge pumping
For this important responsibility, MMB selected the te-sewpas pulsed air raise pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a four.6kW obligation side channel air blower, actuated air management valves, air manifold and management panel housed inside a weatherproof GRP enclosure and is delivered to site totally assembled and tested. Each pulse of air lifts a amount of sludge and discharges it from the sludge discharge pipe. A programmable timer 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 guaranteeing consistent desludging.
The unit can be situated near the tanks that it serves with flexible air supply hoses routed by way of ducts to each of the desludge chambers. The air delivered is hot and consequently there isn’t a need for thermal lagging or insulation. Each te-sewpas unit can serve up to 4 primary or humus tanks with typical particular person air delivery hose size as a lot as 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the 2 humus tanks. Rather than using the standard control panel, MMB determined to integrate the te-sewpas controls into the central PLC and Te-Tech provided a useful design specification for this objective. The challenge was completed in October 2019. “We’ve been using the air carry methods of various 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 robust and we decided to retrofit further techniques in place of standard progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two techniques was accomplished in April 2021.
Significant entire life cost savings
The te-sewpas system provides significant whole life price financial savings when in comparability with standard pumped techniques. For a typical installation serving two tanks, just like the Stocksbridge venture, based on an estimated 25% discount in the electrical power consumption and lowered upkeep 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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