Monitoring the silica content of the Anion Bed will give an early indication of bed exhaustion

This process takes place until all the hydroxl ions on the resin are removed, known as bed 'exhaustion', when the levels of anions will rise in the water from the bed outlet. This is known as 'breakthrough’.

The Mixed Bed contains a mixture of both cation and anion exchange resins to reduce the dissolved solids concentration further, and produce the required treated water quality, which is then used as 'make-up' in the water/steam cycle.