How is AFM® produced and what is it made from?

Activated Filter Media AFM, is manufactured by up-cycling green glass bottles, to produce an activated filter media to replace sand in all types of sand filters and all types of water filtration applications.

The glass proceeds through an activation process which creates a mesoporous structure with a huge catalytic surface area. Typically crushed glass or sand has a surface area of 3,000 m2 per m3, but activated AFM has a surface area of over 1,000,000 m2 per m3, which is over 300 times greater surface area for adsorption and catalytic reactions. Hydroxyl groups on the surface give AFM a strong negative charge known as the zeta potential that attracts heavy metals and organic molecules. In the presence of oxygen or oxidising agents the catalytic surface generates free radicals that oxidise pollutants and disinfects the surface of AFM.

Bacteria are unable to colonise in the media, thereby preventing mud-balling, coagulation and worm-hole channelling of the media. These are the common problems that occur in a sand filled filter and allow unfiltered water through the filter bed. The problems do not occur in an AFM filled filter.

  • AFM replaces sand in all water filtration applications
  • AFM is manufactured from a specific type of glass and processed to provide a hydraulically optimised media in terms of particle shape and distribution
  • The glass then proceeds through an activation process to increase the surface area by 300 times over crushed glass or sand
  • The high surface area is negatively charged (Zeta Potential) to selectively absorb organics, priority substances and small particles
  • The surface also has metal oxide catalysts that give a high redox potential to make AFM self sterilising

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