AFM® is manufactured by upcycling post-consumer green and brown glass bottles. AFM® is verified, by IFTS, to double the performance of sand filters without the need for additional investments in infrastructure.

AFM® is used in single or dual media filtration, with either gravity or pressure filters, for the treatment of ground, surface, sea and wastewater. Two different types of AFM® are produced in our factories: AFM® s (standard) and AFM® ng (next generation).

Both products are exposed to a unique 3-step activation process to become biofouling-resistant and gains superior filtration properties.

AFM Performance

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AFM Product Range

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AFM Certifications

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Unique feature

Biofouling-resistant surface

  • Does not support bacterial growth, eliminates clumping and channeling.
  • Reduces backwash water up to 50%, improving operation cost savings (OPEX).
  • Activated surface area amplifies catalytic reactions, generating free radicals to avoid biofouling on the AFM®’s surface.

Increased surface area

AFM Grade 1 = 50.000 m² / 1‘000 kg (245 ft² per lb) * Sand 0.4 – 0.8mm = 3.000 m² / 1‘000 kg (15 ft² per lb)

  • The high surface area provides for the superior mechanical filtration properties and enhances adsorption of fine particles.
  • Consistent particle size distribution, shape, sphericity, effective size and uniformity coefficient for outstanding hydraulic properties.
  • Provides consistent >1 micron nominal particle filtration performance up to 98% and a life cycle >10 years.

Advanced adsorption properties

AFM® NG: HYDROPHOBIC SURFACE

  • Hydrophobic & non-polar
  • Biofouling-resistant
  • Filters 95% of all particles >1μm
  • Best for organics removal
  • Adsorbs oil & hydrocarbons, microplastics
  • Efficient filtration in hard and soft water
  • Not suitable for backwash with air scouring

  • Best filtration & organics removal

AFM® S: HIGH NEGATIVE SURFACE CHARGE

  • Hydrophilic & polar
  • Biofouling-resistant
  • Filters 95% of all particles >1μm
  • Best for heavy metals removal
  • Adsorbs cationic flocs & di-polar molecules
  • Efficient removal of oil in O&G applications
  • Suitable for backwash with air scouring

  • Best for heavy metals removal

Afm® performance

Filtration performance of AFM versus Sand at 20m/hr (8gpm/ft2) without flocculation

independently verified by IFTS

Removal performance (%)

Particle Size (μm)

AFM® s Grade 0 removes 98% of particles >1μm

AFM®ng Grade 1 removes 95% of particles >1μm

AFM® s Grade 1 removes 95% of particles >4μm

High quality silica sand removes 95% of particles >20μm

AFM® closes the gap between conventional media filtration and Ultrafiltration

Afm® Product Range

Grade
Type
Particle size mm / mesh
Function
0
AFM®'s
0.25 - 0.5 / 60 - 35
Extra fine filtration grade
1
AFM®'s/-ng*
0.4 - 0.8 / 40 - 22
Main filtration grade
DIN
0.7 - 1.2 / 10 - 5
AFM®'s/-ng
Special filter media for high TSS loads
2
AFM®'s/-ng*
0.7 - 2.0 / 25 - 16
Support and Filtration (ng) grade
3
AFM®'s
2.0 - 4.0 / 28 - 10
Support (layer) grade

AFM® Grade 0
is an extra fine filtration grade, providing a 98% particle removal efficiencybdown to 1μm without the use of coagulation and/or flocculation.

AFM® Grade 1
is our main filtration grade. AFM® ng removes 95% of all particles down to 1μm. Coagulation and flocculation may be used to further enhance filtration performance down to submicron.

AFM® DIN Grade
is used as single filtration media or above Grade 3 in selected water and wastewater treatment applications, removing 96% particles down to 4μm. AFM -s/-ng DIN can be used as single media in DynaSand® filters.

AFM® Grade 2
is used as a. support layer. AFM® ng Grade 2 acts as a support and filtration layer removing particles down to 5 μm.

AFM® Grade 3
3 is a support layer used to cover the laterals of a filter to ensure proper flow distribution during filtration and backwash of the filter.

NOTE:
In case of TSS >30 ppm or a turbidity >10 NTU, the use of an Anthracite layer on top of the AFM® bed may be considered to extend the run phase between backwashes

Afm® certifications

  • AFM® complies with EN17978, glass granulates, for treatment of water for human consumption
  • AFM® complies with the Directive (EU) 2020/2184 on the quality of water intended for human consumption
  • AFM® is approved in UK under regulation 31 of the Water Supply (Water Quality) regulations 2016 (as amended)
  • AFM® is certified by WQA to NSF/ANSI/CAN 50 and NSF/ANSI/CAN 61 & 372 Drinking Water Systems Components
  • AFM® is approved in Switzerland according to drinking water ordinace (TBDV) Annex 4, paragraph 4
  • AFM® is produced under certified HACCP principles for use in food and beverage production
  • Dryden Aqua is certified to integrated management control systems ISO-9001, ISO-14001, ISO-45001

Approved in UK and Switzerland for use public water supplies

Used worldwide in the following industries

Water Treatment

Innovative and cost effective water treatment solutions

Water Treatment

Innovative and cost effective water treatment solutions

Aquaculture

Healthy and productive aquatic environments and aquaculture practices

Aquaculture

Healthy and productive aquatic environments and aquaculture practices

Aquaria & Zoos

Sustainable and healthy water treatment for fish, mammals and birds

Aquaria & Zoo

Sustainable and healthy water treatment for fish, mammals and birds

Pools

Crystal clear water and healthy air for private and public swimming pools

Pools

Crystal clear water and healthy air for private and public swimming pools

Afm® Contact Us

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