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How Bio-UV works in reducing
Chloramines Different UV irradiation
levels and wavelength of UV light will affect the water in different ways.
For example, the optimum germicidal wavelength is 254 nm, this
wavelength chops up the RNA and DNA at the centre of bacteria, this
wavelength also chops up proteins and increase the number of nitrogenous
molecules in the water that can react with chlorine to form THM`s
Shorter wavelengths of UV light such as 180nm,
actually produces ozone, but is less effective at disinfection. 180nm UV
light from the sun reacts with oxygen in the atmosphere to generate and
maintain the Ozone layer around the earth. The ozone layer then acts
as a filter preventing 254nm wavelength light reaching the earth. However
254nm UV light also destroys ozone, so there is a very fine balance
between ozone production and destruction. Equally there is a very fine
balance in the use of UV light to treat swimming pool water and the reaction
products produced by the UV light. It is therefore very important to
use the correct equipment, otherwise the UV unit will actually increase the
concentration of volatile chlorine reactions products such as Tri-Nitrogen
Chloride, the combined chlorine level may be reduced by these units but more
dangerous chemicals are produced in their place.
The correct way to proceed is always to reduce
the level of organics in a pool, the most effect means of achieving this
task is to use AFM filter media as opposed to sand. The AFM media will
reduce the bacteria and organic levels in the sand filters by around 1
million times. NoPhos can also be used to remove an essential nutrients need
for bacteria to grow. If you remove the nutrients, the bacteria are
almost eliminated and there are less chemicals in the water to react
with chlorine. There is no point using UV on a pool with poor filtration,
the UV system may camouflage the problem but it can actually make the water
much more dangerous for the public. The first stage is therefore to sort out
the sand filters and flocculation systems.
In the case of swimming pools, UV irradiation of
the water is not needed for the disinfection of the water, because the
chlorine takes care of this task. The purpose of the UV unit is to crack the
chlorine reaction products and make the water safer for the public. Unlike
other UV units our Bio-UV unit has been designed with a power out-put and UV
wavelength specifically to reduce the chloramine concentration.
We believe that the Bio-UV unit is the first and only UV unit designed
specifically for swimming pools and chlorinated systems. For more
information click on the link below.
Click here to go to our
MP UV units
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