Posted by on Monday, January 9, 2012 Under: Disinfection

Bromine is a disinfectant that works in a similar way to chlorine, in that it oxidises pollution on contact. The active disinfectant produced by the addition of chlorine-based disinfectants is hypochlorous acid, whereas the active disinfectant produced by the addition of bromine-based disinfectants is hypobromous acid.

Bromine-based disinfectants are not widely used in conventional commercial pools, largely because it is known to sometimes cause a condition known as ‘bromine itch’ in some swimmers. Also, in has been found that bromine is not as effective as chlorine at controlling microbiological contamination. Bromine-based disinfectants are sometimes used in large leisure pools and spa pools for reasons that are explained below.

There are two ways of producing the active disinfectant (hypobromous acid):

1. Bromochlorodimethlyhydantion (BCDMH)

This method tends to get used by small pool and spas, mainly because it’s fairly easy and relatively safe to store and dose the product and it has a minimal impact on pH levels, so the use of an additional chemical to correct pH is often not required.

2. Sodium Bromide + Hypochlorite

This method tends to get used by large leisure pools, mainly because the disinfection by-products (bromamines) are not a problem in the same way as the disinfection by-products of chlorine (chloramines) are. In fact, some of the bromamines themselves have disinfectant properties. This makes it easier for large leisure pool operators to avoid the chlorine smell and irritant properties of chloramines.

In : Disinfection 

Tags: bromine bromamines bcdmh "sodium bromide"