Bristol Water has upgraded its Banwell Water Treatment Plant in Somerset with the installation of a Siemens Memcor submerged ultrafiltration plant protected by an automatic Bollfilter system (www.bollfilter.co.uk). The Memcor Continuous Ultrafiltration (CS) System provides a barrier against Cryptosporidium, other bacteria and suspended solids, and consists of six racks of submerged membrane filtration cells each containing 240 individual membrane modules. Raw water is drawn through the membrane cell walls and up through fine tubes in each cell to provide filtration to 0.1 micron, with automatic backflushing to maintain filtration performance.
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