Clay Mills upgrade delivers long-term benefits with Chemineer's mixers
18/11/2015 Chemineer (part of NOV)
Sixteen Chemineer™ anoxic mixers, manufactured by NOV, have completed two years of uninterrupted service at Clay Mills STW, Severn Trent Water's new Bio-P Activated Sludge Plant. The Clay Mills upgrade was a £40 million design and construct contract by MWH Treatment as part of the e5 Alliance.Serving a domestic population of approximately 100,000 in the brewing town of Burton upon Trent, the works receives a very significant trade load, resulting in a population equivalent (PE) of 421,879 with a FFT (flow to full treatment) of 112,665m3/d and a DWF (dry weather flow) of 47,000m3/d. As part of AMP5, Clay Mills was given a revised and more stringent quality obligation under the UWWTD (urban waste water treatment directive) P (phosphorus) removal legislation.
In the Activated Sludge Plant (ASP), which has a volume of 30,000m3 split into four double-pass lanes, the slow speed, paddle-type GT Chemineer anoxic mixers have been suspending waste sludge solids and providing complete basin mixing, as Richard Thomson, e5 Project Manager, explains:
"The Chemineer anoxic mixers have proved to be very robust and reliable. They have continually eliminated oxygen incorporation from the liquid surface with no swirl or vortex. They have a proven track record of performance on a number of Severn Trent sites including their largest at Minworth".
Built with a high-efficiency gearbox specifically for agitator service, the modular Chemineer GT mixers have an optimized gear design and lighter weight shaft diameter requirements that makes them very energy-efficient. They also have a quick and easy seal change capability that saves time and reduces maintenance costs.
Throughout the upgrade, close collaboration and knowledge-sharing between the e5 partners and the supply chain produced innovations that generated value engineering savings of £2.6M.
For more information, please contact:
Chemineer (a NOV Mono company)
Process Solutions Group
7 Cranmer Road
West Meadows
Derby
DE21 6XT
Tel: +44 1332 363175
Fax: +44 1332 290323
Email: chemineeruk@nov.com
Web: www.chemineer.com
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