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AFM® carries a permanent surface -ve charge
which means it can remove particles much smaller than sand. AFM®
can reduce organic levels by surface adsorption.
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Surface catalytic properties makes AFM self
sterilizing, we also observe cracking of humic acids, localized
high oxidation potentials, and almost twice the capacity to
remove iron from solution.
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Smooth micro surface makes the AFM® much less
likely to become fouled
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The AFM® bed is much less likely to block of
channel
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Easy to back-flush, approx. 50% less water is
wasted in cleaning AFM®
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AFM® is much easier to keep clean than sand,
and if you keep the AFM® clean, it should never need to be
changed, or at least the service cycle will be greatly increased
over sand.
- The retained organic content of an AFM® bed will be much
lower than an equivalent sand bed.
- AFM® is easier to sterilize
- Very high attrition strength
- Sand and zeolites (air born dust) are classified as a grade 2
carcinogens because of the free silica, zeolites are
particularly dangerous.
- AFM® does not contain any free silica and as such it is much
safer to use than sand.
AFM grade 1 filtration media
(Reference #5.1.0.1)
AFM (Advanced Filtration Media) grade 1 is the standard sized AFM
media equivalent to 16 x 30 grade sand.
Maximum water flow rate through a bed of grade 1 AFM is 30 cubm/sqm/hr,
recommended flow rate for clean water application is 20 cubm/squm/hr,
recommended maximum flow rate for dirty water and tertiary treatment
of sewerage effluent 10 cubm/sqm/hr
AFM grade 2 filtration media (Reference #5.1.0.2)
AFM (Advanced Filtration Media) grade 2 is used as a support media
for grade 1 and grade 0. Sufficient grade 2 should be used in all
pressure filters to cover the laterals or support plate to a depth
of at least 100mm.
Supplied in 25kg sacks, grade 1 particle size 0.5mm to 1.10mm. Media
should be used on top of a layer of grade 2 AFM.
Applications include; tertiary treatment of sewerage effluent,
swimming pools, fish farms and industrial waste water filtration.
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