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Re: $oldier Hard post# 14188

Saturday, 12/20/2008 9:44:42 PM

Saturday, December 20, 2008 9:44:42 PM

Post# of 42662
HOHOHO, thanks, and I like being here with you all. Here's an older article, but still factual and true today about carbon filters

http://www.care2.com/greenliving/carbon-water-filtration.html


Any granular activated carbon filter has three inherent problems.
1. It can provide a base for the growth of bacteria. When the carbon
is fresh, virtually all organic impurities (not organic chemicals) and even
some bacteria are removed. Accumulated impurities, though, can become food
for bacteria, enabling them to multiply within the filter.
2. Chemical recontamination of granular activated carbon filters can
occur in a similar way. If the filter is used beyond the point at which it
becomes saturated with the impurities it has absorbed, the trapped
impurities
can release from the surface and re-contaminate the water, with even higher
concentrations of impurities than in the untreated water. This saturation
point is impossible to predict.
3. Granular carbon filters are susceptible to channeling. Because the
carbon grains are held (relatively) loosely in a bed, open paths can result
from the buildup of impurities in the filter and rapid water movement under
pressure through the unit. In this situation, contact time between the
carbon
and the water is reduced, and filtration is less effective.
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