At the core of the Doulton® ceramic
filter element is the most basic of elements ...EARTH. This
is the same substance which artisans, first in Asia then in Europe,
refined into exquisite porcelain and pottery of the Shoguns and
Kings. This material is Diatomaceous Earth [D.E.], a fossil substance,
made up of tiny silicon shells left by trillions of microscopic,
one celled algae called diatoms that have inhabited the waters of
the earth for the last 150 million years.
Diatoms have one property that sets them apart from other micro
organisms. They weave microscopic shells which they use for the
protection and locomotion. These shells are covered with a pattern
of tiny holes so regular that even the slightest change in their
design usually signifies a different species. As the diatoms died,
their shells survived, slowly piling up in deposits at the bottom
of geological lakes and lagoons. When these lakes dried up, what
remained were huge deposits of "diatomaceous earth".
Today there are over 1500 uses for Diatomaceous Earth, from abrasives
for toothpaste, filtering agents for water and milk, heat insulators
for kilns, to polishing agents in nail polishes, and many many more.
The latest designs of Doulton® filter elements
incorporate pure silver impregnated into a porous ceramic outer
shell [80,000,000 pores] that can trap bacteria down to as low as
.22 of a micron in particle size [1/100,000 of an inch]. Laboratories
consider a filtering medium with an effective pore size of .01 micron
to .45 micron to be bacteriologically sterile and .45 micron
to 1.0 micron to be bacteriologically safe. Regrowth of bacteria
that becomes trapped either on the outside of the element or in
the ceramic's pores is controlled by the silver which, on contact
with water, releases small quantities of positively charged metals
ions. These ions are taken into the enzyme system of the bacteria's
cell and thereby neutralize it. The flow rate of the ceramic filter
can be easily renewed by simply brushing its outer surface under
running water. As the top layer of ceramic and the contaminants
are brushed off and flushed away, a new layer becomes available.
This process can be repeated dozens of times before the ceramic
material is exhausted.
A Closer Look Inside
KIESELGUHR CERAMIC - STAGE ONE
Doulton® ceramic is made from Kieselguhr Diatomaceous
Earth and fired at incredibly high temperatures. Over 80,000 overlapping
pores make up each element. This feature provides absolute mechanical
filtration to .9 of a micron (.5 ANSI). 99.99% rejection of bacteria
and cysts. Bacteria and any other foreign particles are trapped
on the outside of the element while the water passes through the
ceramic wall to the inside of the element.
This simply means self sterilizing. The entire ceramic wall is
impregnated with pure silver. Silver has been long proven
as a disinfectant which insures that bacteria trapped in the ceramic's
pores are killed thereby eliminating any threat of bacteria
THE CORE - STAGE TWO
Inside the Ceramic shell is a post filter which is manufactured
by using a treated granular carbon to form a tightly packed matrix..
This post filter provides Chemical Reduction of chlorine, pesticides,
REDUCES PATHOGENIC (disease causing) BACTERIA - Cholera, Typhoid,
Salmonella, Serratia, E. Coli, Fecal Coliform, Etc.
Removes Cryptosporidium Parvum and Giardia Lamblia Cysts (Beaver
Sub-Micron Particulate Filtration
Quickly and Easily Cleaned for Prolonged Life and Outstanding Economics
World Health Organization
of Health [Toronto, Ontario]
Research Council London England
of Arizona (USA)
Labs (Minneapolis, USA)
Sanitation Foundation (standards 42 & 53)
Labs, Cheshire England
Beale & Suckling Laboratories, England.
Microbiological Laboratories, England
Trent Laboratories, England
Many Independent Laboratories Worldwide