The control of Algae Growth

The presence of algae gives to water an unpleasant odour, flavour and colour, obstructs the removal of turbidity, and may block or foul the distribution system or sand filters. Chlorine dioxide is even effective as an algaecide because of its ability to attack the pyrrolic chain ring of chlorophyll. Therefore, the control of algae growth is carried out by means of a dose of chlorine dioxide of about 0.5 - 1 mg/l; this is added to the water collection basin, preferably during night hours, to avoid its degradation following exposure to light.