Veolia Water Solutions & Technologies will design and build an extension to the existing Sludge Pasteurisation Plant at Thames Water’s Mogden Sewage Treatment Works.
The work is part of a major upgrade that will see Mogden’s process capacity increased by 50%. The increased throughput means more sludge production at the works, and this will be digested to produce biogas fuel which will meet the GLA’s target of 20% energy for the entire works from a renewable source.
The works extension is required to limit the quantity of partially-treated storm water discharged following heavy rain by increasing the works capacity of 1,064Ml/day flow to full treatment and to meet a revised consent. The resulting increased flow to treatment will result in a higher sludge load to the Pasteurisation Plant and then to the Digesters; the Pasteurisation Plant being a process adopted to kill pathogens before the digested sludge is taken off site for disposal.
To provide the additional pasteurisation capacity needed, Principal Contractor Black & Veatch selected Veolia Water Solutions & Technologies. Each of the four new pasteurisation streams will comprise thickened sludge transfer pumps, a pasteurisation reactor, a heat exchanger, reactor blowers and pasteurised sludge transfer pumps. Each stream of the new plant will be controlled by a local control panel which will interface with the Mogden SCADA system. Site construction started in September 2011 and is scheduled for completion by January 2013.
For more information on Veolia Water Solutions and Technologies visit http://www.veoliawaterst.co.uk
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