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14/07/2010
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Two of NOV Mono's recently introduced EZstrip progressing cavity pumps have been installed at United Utilities Fairbourne wastewater treatment works in Wales to improve process efficiency.
 Mary Alexander, senior mechanical engineer at Imtech Process, the project contractor, explains that they are reducing downtime on a critical site process.
Fairbourne WwTW was constructed in 2003 and treats flows from Fairbourne and Bryn Coch pumping stations. Flows to the works pass through a two stage screening process into an anoxic zone and then into a submerged membrane bioreactor plant before final effluent is pumped out to sea.
The two new pumps replaced conventional maintain-in-place pumps on the return activated sludge (RAS) loop from one membrane bioreactor cell to another at 55m3/h.
Alexander says that, due the critical nature of the process, the pumps must operate continuously so an additional EZstrip pump has been supplied as a spare to United Utilities Operational Services, the site operator.
"We specified the Mono EZstrip pumps because, as well as offering a massive reduction in downtime for maintenance and repair, they eliminate the requirement for stator dismantling space, allowing the installation to be kept compact," sates Alexander.
"The Mono pumps are reliable and have been operating smoothly since their installation. We are very happy with their performance," she adds.
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Author
Brian Tinham
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