AMF AMF Users Manual | Page 3

3 Research & Development AFM® is the product of more than 30 years of research and development by Dr.Howard T Dryden. The research was based on a PhD on aluminosiclicate zeolitic sand clinoptilolite for the selective ion exchange filtration of recycled water for intensive closed (RAS) aquaculture systems. Sand rapidly biofouls and coagulates, which results in bio-dynamic instability of the sand bed followed by transient channelling of un-filtered water passing into the product water. This happens in all sand filters, and in aquaculture it will lead to fish mortalities. In drinking water, it leads to disease. AFM® (an activated filter media) was developed as a means of resolving the deficiencies incumbent with all sand filters. The technology is perfectly adapted to any type of sand filter or application, ranging from; drinking water to industrial process water. AFM® will improve performance, reduce risk and stabilise the systems, by providing a predictable repeatable and sustainable performance. Dryden Aqua guarantee statement The performance of AFM® has been independently verified by IFTS, Dryden Aqua guarantee that after 10 years the performance of AFM® will be within 10% of the “as new performance” measured under ISO standard conditions. AFM® must be used in accordance to Dryden Aqua specifications. There will be no reduction of performance or AFM® properties when the media is back-washed at a rate that fluidises the bed by a minimum of 20% for a period or 5 minutes or until the water runs clear. AFM® installed on systems 20 years ago is still performing to specification. Nicola Sturgeon, first minister for Scotland and Howard Dryden CEO of Dryden Aqua, in the AFM® production facility in Edinburgh