Achieving sustainability through new technology and seasonal consenting: Cog Moors storm UV disinfection
Barcock, N.1 and Scannell, C.2,Metoc plc, UK, 2Dwr Cymru Welsh Water, UK
(free)
Cog Moors waste water treatment works (WwTW) is the first in the UK to benefit from a new
stormwater UV disinfection process. The storm treatment provides a more sustainable alternative to over 25,000m3 of storm storage, at one third of the capital cost, and significant reductions in total carbon emission. It also provides greater improvements bathing water quality than could be achieved through storage. A UV system can also accommodate future increases in population, and the potential effects of climate change, removing the need for future expansion of storm provision at the site. Since commissioning the Cog Moors UV plant has delivered consistently high performance.
This paper presents an overview of the scheme development, the UV plant the consenting
process and the development of a successful case for seasonal consenting, which provides
significant additional carbon and energy savings. UV treatment reduces carbon footprint and
annual OPEX by 50% when compared to storage, but seasonal consenting reduces these figures
to 10% and 20% respectively. Most significantly, seasonal operation reduces the UV plants
power consumption and CO2 emissions by 75%.
Keywords
Barry, bathing waters, Cog Moors, CSO, consenting, seasonal consenting, storage, storm water,
UV disinfection, waste water treatment works, WwTW.
