De-chlorination
Excess chlorine in beverage and drinking water can reduce water quality—residual chlorine can react with organic matter to form trihalomethanes (THMs)—and it can also cause off-tastes. Activated carbon is used to remove excess chlorine and minimise these effects.
The mechanism for chlorine removal uses a catalytic rather than adsorption process and takes place on the activated carbon surface. The activated carbon surface is able to be further modified to enhance the natural catalytic reaction.
Activated Carbon base material type, particle size, pH, temperature, flow rate, and the presence of organics all have an influence on chlorine reduction efficiency, which is quantified by the half-value length. This is defined as the bed depth needed for a 50% reduction in chlorine.
To optimise dichlorination efficiency a contact time of at least five minutes is recommended. If THM’s are present, then a longer empty bed contact time of 10 minutes is recommended.
While both coconut shell and bituminous coal bases carbons can be used, coconut shell based activated carbons possess a higher hardness value leading to less operational attrition and provide a fast reaction time.
Jacobi AquaSorb Series
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