Water & Wastewater Treatment

WWT October 2017

Water & Wastewater Treatment Magazine

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Page 20 of 47

www.wwtonline.co.uk | WWT | XXXX 20XX | 21 Setting sail for new waters The Works James Brockett, EdiTor, WaTEr & WasTEWaTEr TrEaTmEnT S outh West Water is progressing well with its £60M project to build a new water treatment works to serve Plymouth, making use of an innovative treatment process which is being used for the first time at scale in the UK. Mayflower Water Treatment Works, which is under construction at a site near Roborough, north of the city, will replace the existing Crownhill WTW, which dates from the 1950s and has reached the end of its natural life. The biggest project in South West Water's 2015-20 business plan, the 90Ml/day works will supply up to 250,000 people with drinking water when it comes into operation in late 2018. The works will use an innovative combination of treatment processes supplied by Dutch water company PWN Technologies, consisting of suspended ion exchange, inline coagulation and ceramic membrane filtration, followed by UV disinfection. The process was tested in a pilot plant using water from the three local sources – Burrator Reservoir, the River Tamar, and the River Tavy - from April 2013 until June 2015, which confirmed that the new technology could successfully treat these raw water sources and produce high quality drinking water while minimising environmental impact. The process is a radical departure from traditional methods of treating surface water, and has already attracted interest from other UK water companies, as well as being set for further deployment by South West Water. Outside of the treatment process, the construction work involved in the project includes around 7km of water mains pipeline – to connect the new site with the existing distribution network leading www.wwtonline.co.uk | WWT | oCToBEr 2017 | 21 south West Water's new £60M Mayflower Water Treatment Works in Plymouth is pioneering a treatment process which will take UK surface water treatment into a new world Mayflower WTW near Plymouth is named a er the 17th century pioneer ship (bottom le )

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