Pretreatment and filtration (A1)

The type of pretreatment system required will depend on the quality of the input water. It may vary from a simple physical filter to a sand filter with an automatic back-flush mechanism. For heavy organic loads a flocculation system may be required and where the input water is alkaline the water will need to be acidified. See figures 1, 2, and 3.

Figure 1 Schematic water reticulation system, large capacity water storage

^{Image showing a schematic water reticulation system for a large capacity water storage unit}

Figure 2 Schematic Water Reticulation System

^{Image showing a Schematic Water Reticulation System}

Figure 3 Mechanical Filtration Unit (A1)

^{Image showing a Mechanical Filtration Unit}