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The EGL team have worked on some of Australia’s
largest ozone/GAC water treatment plants. These
plants uses ozone/GAC to produce high quality re-use water
from treated sewage for up to 40 000 people.
The use of ozonation and Granular Activated
Carbon (GAC) filtration is water treatment is increasing
due to higher standards required for drinking water and general
deterioration is catchments through factors such as pollution
and Blue Green Algae.
Ozonation is used in advanced water
treatment to oxidize break up organic materials such as
pesticides, blue green algae toxins and compounds causing
undesired taste
and odour. Ozone can be generated from atmospheric air or liquid oxygen. It
is applied to the water in special contactors designed to
provide maximize contacting
efficiency while preventing formation of undesired by-products.
Normally ozonation
is followed by filtration through Granular Activated Carbon
(GAC). The GAC effectively removes the oxidized organic materials following
ozonation both through physical adsorption and biologically through organisms
which grow
on the media. When operating in a biological mode, GAC filtration is often
referred to as Biological Activated Carbon (BAC) filtration.
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