What Is AFM ?

AFM® – ACTIVATED FILTER MEDIA

What is AFM® ?

Replaces sand in all filtration applications. AFM® is manufactured from a specific glass type and processed to obtain the optimum particle size and shape. It is then activated to increase the surface area by 300 times over crushed glass or sand.The high surface area is negatively charged (zeta potential) to adsorb organics and small particles. It also has permanent metal oxide catalysts creating a high redox potential to make AFM® self-sterilizing.AFM® is the only activated glass filter media available, and is more efficient and cost-effective than any other filtration media.


Description of AFM®

AFM® is an amorphous alumino-silicate manufactured by up-cycling post-consumer green glass bottles in a dedicated factory designed and operated specifically to produce activated glass water filtration media. AFM® is manufactured and offered as a direct replacement for filter sand and used in most types and designs of sand filter. The one exception is slow bed sand filters operating as biological filtersat filtration velocities of less than 0.2m/hr. AFM® rejects the growth of biofilm and as such it is not suitable for use in slow bed sand filters.


Grades & particle size distribution

The particle shape of AFM® is controlled to maximise surface area and to minimise pressure differential and bed lensing effects. The particle size distribution is also controlled to within very tight tolerance. We can control the sphericity and uniformity coefficient of the grains to maximise particle filtration. While a high sphericity is beneficial for sand this is not necessarily the case for AFM®.The higher the uniformity coefficient the better the filtration performance, but this increases the risk of bed compaction and lensing. AFM® is manufactured as opposed to quarried, the particle size distribution and shape can therefore be maximised to improve performance as a water filtration media. AFM® has an optimised uniformity coefficient in order to maximise filtration performance without causing pressure drops or bed lensing effects.


Chemical Composition by % (all grades)

Composition(oxides) Percentage +/- 10% Composition (oxides) Percentage +/- 10%
Silica 72 Calcium 11
Magnesium 2 Lanthanum 1
Sodium 13 Cobalt 0.016
Aluminium 1.5 Lead <0.005
Antinomy 0.001 Mercury <0.005
Arsenic 0.0001 Titanium <0.01
Barium 0.2 Rubidium <0.05
Cadmium 0.0001 Iridium <0.05
Chromium 0.15 Platinum <0.0001
Inorganic undefined <0.0005 Organic undefined <0.0005

AFM Application Areas

Swimming pool

AFM® reduces the biological risk from bacteria and parasites as well as the chemical risk from water and air just above the surface. The result is a safer pool for children, a healthier work place for staff in public pools and a greatly improved swimming experience for everyone. Read More…

Pretreatment to membranes ( RO & UF)

UF, RO membranes  & DM plant resins work best when they are new and clean. Fouling of the membranes by inorganic and organic contaminants as well as biofouling are some of the main issues effecting the performance and cost of running  water treatment systems.Read More…

Arsenic Removal

Arsenic is often found in borehole / tube wells and ground water at varying concentrations depending upon the geology of the ground. In India western states along with certain locations in the south have fairly high contamination of Arsenic in the ground water. IN certain cases Arsenic is also found in the waste water effluent of certain industries. Read More…

Iron & Manganese removal

Iron and manganese are often found in borehole / tube wells and ground water at varying concentrations depending upon the geology of the ground. Read More…

Chromium removal

Chromium is occasionally found in ground water in trace amount from 1 to 10 ug/l however the occurrence of chromium is usually associated with pollution from industries such a leather tanning, wood preservation and textiles. Polluted ground water may have much higher concentrations. Read More…

Benefits at a glance:

  • Long life span
  • Very short pay back
  • 100% resistant to bio-fouling
  • Filters twice as good as sand
  • Ecological and economical solutions



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