FilterClear ™ Case Study: Loch Ascog Water Treatment Works (WTW) Background Loch Ascog WTW, on the Isle of Bute in Western Scotland, treats water abstracted water from the loch. The main treatment at the works was slow sand filtration followed by disinfection. The quality of the treated water was not compliant with the National Requirements of The Water Supply (Water Quality) Regulations 2000 in relation to: • Iron and manganese • Turbidit

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