Dryden Aqua is one of the largest manufacturer of glass filtration media. As marine biologists, we have a unique knowledge combination and detailed understanding of the biological as well as the physio-chemical reactions in water. This has enabled us to develop and manufacture a highly innovative range of products such as the Activated Filter Media AFM®.
Activated Filter Media AFM®
Direct replacement for sand
AFM® Activated Filter Media is a direct replacement for sand, doubling the performance of sand filters without the need of additional investments in infrastructure. AFM® resists biofouling, biocoagulation and transient wormhole channeling of unfiltered water and outlasts all other filter media.
AFM®is a highly engineered product manufactured from a specific glass type, processed to obtain the optimum particle size and shape. It is then exposed to a 3-step activation process to become self-sterilizing and to acquire superior adsorption properties.
WHY CHOOSE AFM®
Self-sterilizing surface
Fully resistant to bacterial growth
Increased surface area
Superior mechanical filtration
High negative surface charge
Advanced adsorption of heavy metals
Benefits
Fully prevents bacterial growth, biocoagulation and channeling in the filter bed
Provides exceptional water clarity: Certified 1 micron filtration (w/o flocculation)
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Delivers stable filtration performance and outlasts all other filter media
Certified for pools, potable water use (NSF 50/61), food & drinks markets (HACCP)
Prevents the formation of harmful disinfection by-products (THMs, NCl3)
Significantly lowers chlorine oxidation demand
Attracts and removes heavy metals, organic matters and microplastics
Offers substantial water and energy savings thanks to shorter and slower backwashes
What makes AFM® so effective?
We use predominantly green and brown container glass as it has the correct chemical and structural properties for our activation process.
Particle shape and size distribution are critical for the best fluid hydraulics and solids retention. For example, solids can easily push their way through glass bead filter media but with a subangular AFM® media, the grains lock together to prevent the solids slipping through.
The AFM® activation process increases the surface area available for adsorption by up to 300 times to 1‘000‘000 m2/m3. This means 300 times more surface area for the adsorption of dissolved organic pollutants. The huge surface area coupled with the magnetic attraction of the negative zeta potential makes AFM® the best filtration media for potable water treatment.
Product Specification
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Bulk bed density: 1‘250 kg/m3
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Effective size: 0.45 mm
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Spherizity: 0.75 - 0.80
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Uniformity coefficient: 1.6 - 1.8
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Aspect ratio: 2 - 2.4
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Specific gravity: 2,4 kg/l
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Organic contamination: < 50g/ton
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Color purity: > 98%
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AFM® is supplied in 21 kg (47 lbs), 25 kg (55 lbs) or 1000kg (2200 lbs) bags
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AFM is available in 4 grades
