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1. What is AFM®
AFM® is an amorphous alumino-silicate (glass) manufactured by up-cycling post-consumer green glass bottles in a dedicated
factory designed and operated specifically for the production activated glass water filtration media.
The particle shape and size distribution are optimised for filtration. AFM® is not a passive filter media, the surface is activated
by a SolGel like process, the surface structure of each grain of media is altered to control;
• surface area
• charge density
• catalytic properties
• molecular sieve properties
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 controlled to within very tight tolerances. We 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 unifor mity 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.