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Re: [APD] diatomite
Hi Scott,
Thanks for your help,
I was looking online to see if I could find that brand in the Houston area
and thought you might be interested in this site, the prices are a little
cheaper.
_http://www.coolpooldeals.com/pumpscleanersheaters/filteringmedia/diatomaceous
.html_
(http://www.coolpooldeals.com/pumpscleanersheaters/filteringmedia/diatomaceous.html)
Below is some information I found interesting.
What is Diatomite? (Also known as Kieselguhr and diatomaceous earth)
Diatomite is a fossilised mineral of vegetable origin. It is the
accumulation of an enormous number of fossil diatoms.
Diatoms are single cell plants of microscopic size. There are many varieties
that live in both freshwater lakes and saltwater oceans, staying close to
the surface where they form part of the abundant plankton. Alive, they are at
the base of the food chain. Dead, they leave a tiny skeleton known as a
frustule.
Whereas most other plants use solar energy to synthesise cellulose for their
cell walls, the diatom extracts amorphous silica from the water, building
for itself what amounts to an elegant, but strong shell with highly symmetrical
perforations.
Diatoms reproduce themselves in bi-cell divisions every few hours and it has
been estimated that a single diatom could produce up to 1,000,000,000 diatoms
In its natural (milled) state, the individual diatoms are extremely small
and would form a very fine (low permeability) filter-cake, which would be too â
slowâ for most filtration applications. To create larger particles, the
diatoms are fused together at high temperatures. These larger particles are then
classified, according to their specification.
Large deposits are now open-cast mined in the USA, Northern Europe and
Iceland.
Two types of Diatomite are processed:
1. Freshwater origin, which are tubular and extremely effective and
efficient in the removal of very fine solids and applications where fast
flow-rates are required. All types are processed at temperatures ranging from 8000
to 11000ÂC. Both calcined and process-calcined Diatomite filter aids are free
of organic matter and are non-absorptive. Celatom is a fresh water brand of
diatomite.
2. Seawater origin, which are composed of rods, flowers, boats and
snowflake shapes. These have the same use as freshwater daitomites, they are just
a different shape.
(http://www.flexibulk.co.uk/flexibulk_web/ask_bulk.html#top)
Bill
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