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.
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.
Smooth micro surface makes the AFM® much less
likely to become fouled
The AFM® bed is much less likely to block of
Easy to back-flush, approx. 50% less water is
wasted in cleaning AFM®
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
- 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
- AFM® does not contain any free silica and as such it is much
safer to use than sand.
AFM grade 1 filtration media
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 #188.8.131.52)
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.