The river water was pre-treated prior to demineralisation using a conventional cation-anion-mixed bed ion exchange system with intermediate degassing. During commissioning the demineralisation plant failed to meet the required 0.1μS/cm conductivity specification and the problem was traced to a high total organic carbon content in the river water.
The pre-treatment process provides good removal of high molecular weight humic acids but not the lower weight fulvic acids. These passed into the ion exchange plant causing organic fouling and a resultant high conductivity which threatened the commissioning programme and ongoing plant efficiency. The Project Manager had previous experience of a similar problem and knew exactly what to do: he called Veolia Water Technologies AQUAMOVE team.
The AQUAMOVE team provided two 25m3/h MORO mobile reverse osmosis units to treat the filtered water, removing the traces of organics and reducing the total dissolved solids (TDS) concentration prior to demineralisation.
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