Severn Trent Water deploys Bluewater Bio’s HYBACS technology to upgrade its Ashbourne sewage treatment works in Derbyshire

Posted: Friday 2nd March 2012

Bluewater Bio International, the provider of HYBACS®, a high-performance and highly cost-effective wastewater treatment technology, is pleased to announce that Severn Trent Water (LSE: SVT.L) (“Severn Trent”), through its key framework contractor MWH Treatment (“MWH”), has placed an order for Bluewater Bio’s HYBACS® wastewater treatment technology to upgrade the Ashbourne sewage treatment works (“STW”) in Derbyshire, which serves a population equivalent of approximately 35,000.

The order follows three years of close collaboration between Bluewater Bio and Severn Trent, during which time HYBACS® was evaluated in a containerised demonstration plant at Coleshill STW in Birmingham. Mark Jones, Waste Water R&D Manager for Severn Trent, explained: “Rarely do we come across such novel technologies as HYBACS® and following an extensive and lengthy on-site evaluation we were convinced that this could provide real cost effective solutions to the challenges we face. We believe that HYBACS® has great potential, especially as a ‘slot in’ process for the upgrading of existing sites due to its low operational cost and small additional hydraulic head requirements.”

Adrian Harris, Chief Operating Officer of Bluewater Bio, said: “We worked very closely with Mark’s R&D team during this evaluation period in which the HYBACS® plant demonstrated a very high performance and, in particular, the high level of nitrogen removal required both to meet and exceed the most stringent European treatment standards. We would like to thank Severn Trent for their commitment and support during this time.”

The demonstration of an enhanced level of nitrogen removal was especially important because the requirements under Europe’s Urban Waste Water Treatment Directive exceed those of the Total Nitrogen metric in South East Asia, where earlier versions of the technology originated.

The overall plant upgrade is being carried out by MWH to whom Bluewater Bio will supply four of its proprietary SMART™ unit reactors, which power the HYBACS® process. The upgrade is being undertaken as a result of an imminent increase in load to the works, of approximately 45 per cent, due to expansion by a major trader within the Ashbourne catchment. The selection of the HYBACS® process at Ashbourne followed an extensive review of alternative treatment options. These were assessed with a view to delivering the most efficient and cost beneficial solution with consideration given to a range of key factors, including: initial capital investment, ongoing operational costs, embodied and operational carbon, maximisation of the existing assets, constructability and delivery timescale, planning risk, and power requirement. The project team recognised that the HYBACS® solution delivered distinct advantages within these selection criteria over the other process options. The works are programmed to be completed in May 2012.

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