Yorkshire Water uses Te-Tech air-lift pumping for wastewater duties

Mike Froom, Business Development Director for Te-Tech Process Solutions in Southampton, UK, explores the advantages of a pulsed air lift sludge pumping option compared to standard pumped techniques.
A te-sewpas unit at Stocksbridge.
When Yorkshire Water decided 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 price. The relocation also allowed for an upgrade from thirteen,000 inhabitants to fifteen,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 primary 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 and then flows by gravity to re-enter the method upstream of the primary settlement tanks.
pressure gauge 4 นิ้ว , low opex sludge pumping
For this crucial obligation, MMB chosen the te-sewpas pulsed air carry pump system equipped by Te-Tech Process Solutions. The self-contained unit incorporates a 4.6kW duty facet channel air blower, actuated air control valves, air manifold and control panel housed inside a weatherproof GRP enclosure and is delivered to site absolutely assembled and tested. Each pulse of air lifts a quantity of sludge and discharges it from the sludge discharge pipe. A programmable timer within the PLC permits the frequency and duration of desludging to be adjusted to permit the sludge to consolidate thus eliminating any potential ‘rat-holing’ and ensuring constant desludging.
The unit can be situated close to the tanks that it serves with versatile air supply hoses routed via ducts to every of the desludge chambers. The air delivered is scorching and in consequence there is no need for thermal lagging or insulation. Each te-sewpas unit can serve up to four main or humus tanks with typical particular person air delivery hose length as a lot as 35m.
At Stocksbridge, a single Type B te-sewpas unit with duty/standby air blowers serves the two humus tanks. Rather than utilizing the usual control panel, MMB decided to combine the te-sewpas controls into the central PLC and Te-Tech supplied a useful design specification for this function. The project was completed in October 2019. “We’ve been using the air raise methods 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 sturdy and we decided to retrofit extra techniques in place of typical progressive cavity pumps at each Stillington and Sutton-on-the-Forest.” Installation of those two techniques was completed in April 2021.
Significant complete life cost financial savings
The te-sewpas system provides significant entire life cost financial savings when compared to standard pumped systems. For a typical set up serving two tanks, like the Stocksbridge venture, primarily based on an estimated 25% reduction in the electrical power consumption and reduced upkeep requirements, te-sewpas provides a 40% decrease capital cost and 50% reduction in operational price compared to a pumped desludge system.
Share

Leave a Comment