European Commission project  for your
Life & the Environment click here
AFM
Active Filter Media
replaces sand in all types of sand filter
Environmental & sustainable water treatment to save the planet

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AFM Applications ]| index | Drinking water | Swimming pools | Aquaria & water parks | Sewage effluent | wastewater & grey water| Desalination pre-treatment | Fish Farms | Cooling towers | environment |
Schematics of a desalination system
Dryden Aqua are marine biologists specialising in the mechanical filtration of seawater for the aquaculture industries.  AFM will physically remove particles half the size of the smallest particle than can be removed by sand filters.  However in addition to the physical filtration of solids, AFM also has surface active properties and the media will adsorb micron, sub-microns as well as dissolved organics from the water.  Indeed we are working on the next generation of AFM that will work as well as activated carbon,  but it will never need to be replaced. AFM will already remove most of the organics from the water especially if pre-coagulation and flocculation is used.

 

System specification.

The performance of any media bed filtration system be it sand or AFM will vary inversely proportionally to the flow of water through the filter bed, so the slower the run phase water flow the better the performance.  It can sometimes be a false economy to use high water flow rates to reduce the capital cost and foot print of the system, as it may result in extra running costs for the membranes.  In all cases irrespective of water flowrate, AFM will out performance sand, anthracite or expanded clays.

  • water flow through the AFM filters, 5 to 10 m3 hr-1 m2 of filter bed surface area, absolute maximum is 15m3 hr-1 m2

  • recommended filter air purge rate 90 m3 hr-1 m2 of filter bed surface area

  • back-wash flow rate 40 to 60 m3 hr-1 m2 of filter bed surface area

 

 

 

 

 

AFM®Active Filter Media
AFM is an Internationally registered Trade Mark, AFM manufacture and use in industry is covered by Patent.
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