Clear Water Tank Lime Dosing & Mixing Oswestry Water Treatment Works Shropshire, UK The Problem Oswestry WTW consists of an inlet works and a series of gravity sand filters before the untreated water enters the Clear Water Tank (CWT). Chlorine dosing takes place at the three CWT inlets and lime slurry dosing takes place near the two CWT outlets. The lime dosing is required to adjust the pH of the water. The existing lime slurr

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