Ozone is a blue gas with a relative molar mass of 48 and
molecular formula of O{-3}. It converts back into oxygen after its oxidising
process. This makes it the most eco-friendly treatment known today. Ozone is
the ultimate in disinfection. When drinking water is treated with chlorine
(chlorine is a highly carcinogenic chemical), the residual chlorine in water is
also consumed along with the water.
On the other hand ozone, having half the life of only about
20 minutes, unreacted ozone reduces to oxygen, leaving no trace of toxicity in
water. The water is free from chlorine. Ozone reacts with impurities such as
micro organisms including bacteria, virus, spores, mould and fungi. Chemicals
such as chlorine neutralise them. As ozone destroys all micro organisms and it
removes disagreeable odours, the resultant water is absolutely safe, pure,
fresh and healthy. Ozonised water is colourless and odourless.
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The advantage of the use of ozone in water is that it does
not leave a dangerous chemical residue like many conventional treating
chemicals. Ozone generators produce ozone by passing oxygen through an
electrical field. Then the generated ozone is bubbled through the water to be
treated in a specially designed vessel to control rate of injection. The amount
of ozone to diffuse in water depends on the contamination of water. Courtesy : The
Hindu
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