Evoqua WALLACE & TIERNAN Barrier M 1200, Operating Manual

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Barrier M
Description
3.
15
3. Description
3.1 General information
UV radiation is increasingly employed as an environmentally-fri-
endly alternative to chemical disinfection methods, especially for
applications in which a depot effect is not required. The advan-
tages are obvious:
• There are no by-products
• The taste and smell of the water remain neutral
• UV radiation is non-corrosive
The Barrier M system was primarily designed for the treatment of
drinking water, swimming pool water and process water. It is
equipped with special lamps type WTL in accordance with the
medium-pressure principle. These emit a UV-C wavelength spec-
trum of 200 to 300 nm which is absorbed by micro-organisms in
the water and which affects both the DNA and cell walls, protein
and enzymes. The repair mechanisms of the micro-organisms are
therefore also destroyed.
The properties of the water requiring treatment are decisive for the
number and strength as well as the optimum arrangement of the
WTL high-power lamps. The spectral extinction coefficient SEC is
particularly important for the configuration of the UV disinfection
unit, the transmission value T
10
can also be used.
Bild 1 Bacteria
Flagellum
Capsule
Pili
Enzymes
Proteins
DNA
Cell wall
Cytoplasm
Membrane
(Whip)