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Ultra Violet Purification |
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Ultraviolet is one energy region of the electromagnetic spectrum, which lies
between the x-ray region and the visible region. UV itself lies in the ranges
of 200 nanometers (nm) to 390 nanometers (nm). Optimum UV germicidal action
occurs at 260 nm.
Since natural germicidal UV from the sun is screened out by the earth's
atmosphere, we must look to alternative means of producing UV light. This is
accomplished through the conversion of electrical energy in a low-pressure
mercury vapor "hard glass" quartz lamp. Electrons flow through the ionized
mercury vapor between the electrodes of the lamp, which then creates UV light.
As UV light penetrates through the cell wall and cytoplasmic membrane, it
causes a molecular rearrangement of the microorganism's DNA, which prevents it
from reproducing. If the cell cannot reproduce, it is considered dead.
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