Burnhill Green sewage treatment plant improves efficiency with packaged pumping systems

STAFFORDSHIRE, UK, Aug. 6, 2009 -- Severn Trent Water has installed two high performance Mutrators from NOV Mono at its Burnhill Green sewage treatment works in Staffordshire...

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STAFFORDSHIRE, UK, Aug. 6, 2009 -- As part of an ongoing initiative to improve efficiency and reduce maintenance costs, Severn Trent Water has installed two high performance Mutrators® from NOV® Mono® at its Burnhill Green sewage treatment works in Staffordshire.

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Typical installation of a Mono Mutrator packaged pumping system.
Mono Mutrators are packaged pumping systems that combine a Mono macerator and Mono progressing cavity pump to macerate any solids within a flow and protect the pump from blockages. They were specified by Severn Trent Water to replace its existing CMD40 Mutrators, which had continued to perform efficiently for nearly thirty years, and now needed replacing. The new equipment has been installed for the transfer of raw sewage at a capacity of 13 m³/h to a high level Rotating Biological Contactor (RBC).

Neil Horton, Project Engineer for Adroit Construction Services, the framework contractor on the project, commented: "We were very happy with the performance of the existing units at Burnhill Green and therefore wanted a 'like for like' replacement.

"Mono's service was excellent. We simply informed Mono of the model number of the existing Mutrators and they quickly supplied us with the latest design. The new Mono Mutrators are not only saving us energy but also reducing our maintenance costs."

By combining a Mono progressing cavity pump, together with a tri-hammer macerator fitted in the suction line, the Mono Mutrator is able to lift the raw sewage from the collection sump into the cutting chamber to finely macerate any solids prior to entry into the pump. Blockages are therefore eliminated and when the pumping cycle ends, large unmacerated solids fall back into the sump, clearing the suction pipe for the next duty run.

The Mono Mutrator is available in various design options to suit different wastewater handling applications and can be installed either vertically or horizontally to give the lowest possible design/construction costs. It has a number of drive options for optimum pump speed and reduced power consumption, and is also able to pump long distances and high heads.

The positive displacement action of the Mono pump offers the benefits of smooth and controlled transfer of the sewage through small bore pipes into the main sewage system for further treatment. Being a positive displacement pump, head is independent of speed. This, combined with correct pump selection, leads to low wear rates, minimal spares usage, lower running costs and less downtime, minimizing least whole life costs. On many high head pumping duties, Mono Mutrators can consume less than 50% of the energy of conventional sewage pumps.

For more information on Mono's Mutrator units, or any of Mono's high performance packaged solutions, visit www.mono-pumps.com.

Based in Manchester, NOV® Mono® is Europe's leading designer and manufacturer of pumps, parts, grinders, screens and packaged systems, supplying many different sectors including, water and wastewater, food and beverage, chemical and pharmaceutical, oil and gas, minerals and mining and paper and pulp. Mono's product range includes heavy and light duty industrial transfer pumps, widethroat pumps, hygienic pumps, dosing pumps, solar pumps, as well as Munchers® and screens.

NOV® Mono® Group
The NOV Mono Group is a worldwide leader in pumps, parts, grinders, screens and packaged systems. With revenues in excess of $170 million, the NOV Mono Group has 700 authorised distributors across the globe and employs over 750 people.

National Oilwell Varco (NOV)
National Oilwell Varco is a leading provider of oilfield products and services to the worldwide oil and gas industry and has been since 1841. The company's headquarters are in Houston, USA and it has over 100 subsidiaries with over 1,000 sites around the world, employing 36,000 people. National Oilwell Varco, which has a turnover of $14 billion, acquired Mono in 2003.


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