Water Supply Vol 2 No 1 pp 11–16 © IWA Publishing 2002
Arsenic treatment technology for groundwaters
N. Selvin*, J. Upton**, J. Sims*** and J. Barnes****
*Severn Trent Water Ltd, Avon House, St Martins Road, Finham, Coventry, CV3 6PR, UK
**Severn Trent Water Ltd, Avon House, St Martins Road, Finham, Coventry, CV3 6PR, UK
***Severn Trent Water Ltd, Avon House, St Martins Road, Finham, Coventry, CV3 6PR, UK
****Severn Trent Engineering, Trinity Square, Horninglow Street, Burton Upon Trent, B16 9DD, UK
ABSTRACT
The new United Kingdom drinking water standard of 10  g/l arsenic will become a statutory obligation in 2003. To comply with the new standard, Severn Trent Water will require a new treatment process to be installed at 17 groundwater sites. The Company embarked on a development programme in 1995, with pilot studies commencing in 1996. Investigations have covered a range of potential treatment technologies including coagulation, ion exchange, reverse osmosis and adsorption. Adsorption with granular ferric media was found to be the best available technology for treating groundwater in Severn Trent.
The paper details the development work undertaken, which has focused on the evaluation of aluminium and ferric based granular medias. This has enabled the design and construction of the first arsenic adsorption plant in the UK, with an output of 20 Ml/d.
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