Full Spectrum Ceramics
Doulton made Water Filter Ceramic Candle & Cartridge
Technologies, taking the mysteries out of the drinking water
Ceramics, a natural water filter - Sterasyl
Doulton mines only the finest and purest kieselguhr or diatom
earth often described as a silica-like sediment resulting
from kiesel algae (one celled algae) deposited on the bottom
of geological lakes and lagoons millions of years ago. This
is the same material used in making the finest bone china
(like of Royal Doulton) and numerous other applications.
The filter elements are produced using the latest ceramic
techniques to provide a hollow porous ceramic which is fired
at a temperature in excess of 1000°C. The chemically
inert ceramic filter can be stored for eternity without
losing its effectiveness.
Doulton ceramic filter particles from the water but leaves
oxygen and mineral contents unchanged, which gives water
it's spring-like freshness and taste (not
"pure" but wholesome). Pathogens of the most varied
diseases which are reliably filtered from the water include;
cholera, typhus, cryptosporidium, amoebic dysentery, ecoli,
colibacillose or bilharzia, anthrax spores among others.
Ceramic filtration technology is often called "dead-end
filtration" and "depth filtration". The raw
water is forced by mains pressure through the ceramic filter
from the outside inwards as with pressure filters,
atmospheric pressure with gravity filters.
The porous structure of the filter allows the passage of
water; particles and very small bacteria are held back at the
filter surface. The result is clear, sterilized water.
Given favourable conditions, the accumulated bacteria could
proliferate and grow unless prevented by some means.
To prevent this the elements are manufactured with a
small amount (about 0.07%) of pure silver (Ag) through-out
the porous ceramic shell. Silver is a recognized bactericide,
so when the bacteria comes into contact with the silver
impregnated ceramic, their growth is inhibited. This
self-sterilizing effect is known as the bacteriostatic
Mechanical regeneration of the ceramic filter is simple. The
topmost blocked layer can be removed with stiff brush or
scouring pad (e.g. Scotch Brite®). This can be repeated
many times before the filter has to be changed.
Silver, a nature's water purifier
Free silver ions (Ag+) have a toxic effect on
micro-organisms even in relatively low concentrations. They
have a highly fungicidal, bactericidal and algaecidel effect.
Medical studies describe silver ions a catalyst that disable
the enzymes that microorganisms depend on to
In the presence of air (oxygen in water), metallic silver
forms silver oxide, which also has a bactericidal effect due
to its adequate solubility. The destruction of viruses,
bacteria, moulds, spores and fungi through contact with
silver objects is termed the oligodynamic effect. To
primitive life forms, oligodynamic silver is
as toxic as the most powerful chemical disinfectants. This,
coupled with its relative harmlessness to animate life (i.e.
mammals), gives oligodinamic silver great potential as a
The best and most environmentally-friendly silver based
disinfectants are capable of rendering stored water potable
for long period of time as in space stations.
The silver leach rate from the 4 stage ceramic is very low
and always well below the national recommended limits or
equivalent to having a meal using silver cutlery.
Also, the ion exchange carbon block, which the water passes after the ceramic, would take care of that.
Silver is used widely to prevent scumming in water storage tanks, to sterilize and purify water aboard NASA's Space Shuttle and on commercial airline flights.
Activated carbon as another natural adsorber
The Full Spectrum cartridge uses high quality carbon blends obtained from
different raw materials such as lignite, bituminous coal and
coconut shells. Active carbon is used for water treatment due
to its adsorbing effect with respect to organic and health
Activated carbon surfaces are both hydrophobic and
oleophilic; that is, they "hate" water but
"love" oil. When flow conditions are suitable,
dissolved chemicals in water flowing through the carbon media
"stick" to the carbon surface in a thin film while
the water passes on. This process is call adsorption.
Substances affecting taste and odours such as chlorine,
pesticides (lindane, DDT) and trihalogenmethanes (THMs) are
removed by activated carbon. These substances are adsorbed on
the large surface area of the active carbon. For visual
purpose, one teaspoon of activated carbon has a surface area
the size of a football field.
Active carbon is available in granulate (G.A.C. filters)
powder (PAC filters) or extruded solid carbon block form (CB
Ceramic Candles and Cartridge Grades
2 Stage ceramic membrane: (candle and cartridge form): Used for
microbiological removal. The only ceramic element in the
world to meet the stringent NSF antimony and arsenic
extraction test featuring:
· 99.99% E.coli removal
· Tested with live Cryptosporidium cyst to 100%
removal far exceeding EPA three log cyst reduction
· 100% efficiency at 0.9 µm absolute (0.5
µm absolute ANSI standard)
· 98% efficiency at 0.2 µm
· 90% efficiency at 0.05 µm
· 0.07 NTU turbidity reduction
Least expensive absolute filter on the market as it is
cleanable and reusable for up 60 times. Backwash capable,
self-sterilized, no bacteria grow through as encountered in
most all synthetic membranes.
4 stage Full Spectrum elements: Used in all pressure filters with ATS ion exchange medium incorporated into the
carbon block for heavy metal reduction. Economical four stage
filtration available in candle and cartridge style.
Stage One; Washable sub-micron ceramic pre-filter (to 0.3 microns)
Stage Two; Ceramic impregnated with silver which kills bacteria and cysts on contact
Stage Three; Ion exchange resin for removal of lead and heavy metals
Stage Four; Compressed carbon block to remove chemicals, chlorine, VOC's, THM's and bad tastes
Conclusion: Full Spectrum ceramic filters are designed to convert
raw water into high quality drinking water that will comply
with the most stringent potable water standards all 100%
* Heterotrophic (HPC) is a harmless bacteria commonly found
in all waters. In absence of disinfectants this bacteria
colonize the reverse osmosis holding tank. As the bacteria
die it creates foul odor therefore all RO's have GAC
final filter to remove the odor out of the water. It should
be clearly understood that no GAC filter remove any bacteria.
Consider the rest then go with the best!
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