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Mechanical water treatment
Katadyn Ceramic
Ceramic filters have a micro porous structure with impregnated silver which
delays the growth of bacteria. The pore-size of Katadyn ceramic filters is
0.2 micron (0.0002 mm). Bacteria range in size from 0.2 to 5 micron and like
protozoa (1 – 15 micron), are efficiently filtered out. Ceramic filters can
be mechanically regenerated and the filter capacity is measurable.
Activated Carbon
Activated carbon is used for its ability to reduce harmful organic and
inorganic substances in the water. It removes unpleasant tastes, odors,
chlorine, pesticides (lindane, DDT) and trihalomethanes (THMs). These
substances adhere to the large surface area of the activated carbon.
Activated carbon granulate cannot be regenerated.
Glass fiber
Superfine glass fiber, within two supporting layers, forms a depth filter.
Nominal pore size of 0.3 micron mechanically filters all bacteria and
protozoa. The flexible glass fiber is pleated resulting in an extremely
large surface area and a very high capacity to absorb dirt.
Chemical water
treatment
Silver
Silver ions are attracted to bacteria by polar adsorption. After penetrating
the cell membrane, the ions damage the bacteria's DNA, thus preventing
further multiplication. The bacteria's respiratory system is attacked and
blocked, causing a chain reaction, and as a result the bacteria die.
Chlorine
Chlorine is the most commonly used substance for water treatment worldwide.
It works quickly and has a broad range of applications. Chlorine, however,
is not suitable for conservation and must be applied in the correct dosage.
Iodine
Iodine, like chlorine, is a halogen and has a similar spectrum of activity.
While it is more pH-independent and more readily storable than chlorine, it
is not quite as potent and therefore has a slightly longer contact time.
Without an activated carbon post-filtration medium, iodine leaves the water
with an unpleasant taste. To eliminate the disadvantages of iodine, Katadyn
only uses iodine with activated carbon post-filtration. |
