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AFM Active Filter Media for sand filters

AFM Active Filter Media for sand filters. 100% Sustainable high performance water treatment. www.AFMfilter.com. Applications for AFM. Marine mammals and birds in biological and chlorinated systems Freshwater and marine aquaria. Mammals and birds. Chlorinated systems.

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AFM Active Filter Media for sand filters

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  1. AFMActive Filter Media for sand filters 100% Sustainable high performance water treatment www.AFMfilter.com

  2. Applications for AFM • Marine mammals and birds in biological and chlorinated systems • Freshwater and marine aquaria

  3. Mammals and birds Chlorinated systems • One of the main reason for stress & mortalities among marine mammals and birds in chlorinated system is pneumonia from lung damage caused by the chlorine reaction product trichloramine • Trichloramine is formed by reaction between ammonium and chlorine at a low pH in the biofilm on the surface of sand in the sand filters • AFM does not support a biofilm, therefore there is no trichloramine production

  4. Mammals and birds Biological Systems • The high organic input results in the sand filters rapidly becoming biofilters. • Muco-saccharide alginates excreted by heterotrophic bacteria causes coagulation of the sand filter bed which leads to channelling of water directly through the bed • AFM actively prevents biofouling, so an AFM bed does not coagulate. • AFM improves sand filter performance by 30% to 80%, resulting in a major improvement of water quality.

  5. AFM in Marine & freshwater aquaria Monaco aquarium • AFM was developed to replace sand used in sand filters for commercial aquaculture. Due to the high organic loading sand filters suffer from biofouling and coagulation. This also happens in marine aquaria, albeit at a slower rate, but after a few weeks or months, it will start to impact on performance. Kuwait Foundation for the Advancement of the Sciences (KFAS) "We have had your AFM in our raw water filters for a few weeks now and have been monitoring the results. Wow what a difference. Backwash is complete and there is no channelling or clumping at all even with our very fine sediments. I wish the aquarium folk would take more cognisance of what is happening in the aquaculture field"

  6. AFM Active Filter Media replaces sand in all types of sand filter Benefits • Channeling eliminated & filter performance improved by 30% to 80% in terms of solids removal. • Major life cycle cost savings over sand, 75% saving on back-wash water, 15% to 25% on pump energy • visibility through the water doubled • Reduced ozone demand, better pH stability, reduced rate of nitrate production www.AFMfilter.com

  7. AFM back-wash performance • What goes into a filter must come back out. • Performance of AFM is maintained because back-flush efficiency is 100% • Sand filters discharge retained solids and bacteria in pulses back into product water AFM reproducible normal distribution on back-flush efficiency. Sand was a variable straight line on back-flush performance as measured by turbidity against time

  8. Bacterial levels Bacterial levels on AFM and sand after 3 months in a clean water filter. The Table below is certified data showing total bacterial levels of 3.6 million with sand, and essentially zero with AFM

  9. AFM is an active filter media rate of Biofouling • Electron micro graphs of sand and AFM • Sand has 100% bacteria coverage after 3 days • AFM stays free of biofouling, even after 5 years in sewage effluent • High level of bacteria reduce filter performance by 30-80% and increase ozone demand & load on biofilters New sand Used sand New AFM Used AFM

  10. AFM is an active filter mediaAdsorption • Hydrophilic surface with a negative Zeta potential • Adsorbs small particles and even dissolved organic molecules from the water. • AFM-plus in development will approach activated carbon performance Graph shows that AFM adsorbs organics directly from solution www.AFMfilter.com

  11. AFM is an active filter mediaBio-resistant • Sand becomes a bacteria incubator after only a few days • In RGF (rapid gravity) and pressure filters, biofouling of sand reduces performance. • The extracellular alginate excreted by bacteria cause worm holes through the sand bed and coagulation of sand. • AFM resists biofouling and stays clean. The above two graphs show that the sand is becoming a biofilter as indicated by the reduced ammonium and high nitrite levels. Test conducted on UK water company systems

  12. AFM see the difference Summary • 30% to 80% more solids removed • Turbidity levels reduced by 50% and visibility doubled • Reduced ozone demand, reduced nitrate production, reduced alkalinity consumption for pH stability • Back-wash water reduced by 75% • Energy savings approx 15% to 25% • AFM will never need to be replaced • Can be used in any good quality sand filter

  13. Filter operating criteria • The performance of any media bed filter be it sand or AFM varies inversely proportionally to the flow rate. • Run phase flow should be less than <20 cubm/hr/sqm • Air scour 90 cubm/hr/sqm for a period of approximately 5 minutes • Back-wash > 40 cubm/hr/sqm for 2 to 5 minutes, or until the water runs clear.

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