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DAISY Dryden Aqua Integrated System for crystal clear and healthy swimming pool water. Innovative technology in harmony with nature DAISY filter circulation for public pools ZPM Variable speed pump 1 Filtration with AFM® 2 Coagulation and flocculation with APF and ZPM 3 Catalytic oxidation with ACO and ZPM

About Dryden Aqua Prevent bacteria growth instead of killing bacteria We are marine biologists specialising in swimming pool water treatment. Our mission is to eliminate toxic chlorine by-products and provide the best air and water quality on the market. For over 30 years we have been working with chlorinated systems for dolphins and other aquatic mammals before successfully introducing our technology to the pool industry. There are over 100‘000 swimming pools worldwide using our products today. Dr Dryden is a marine biologist with a unique knowledge combination of biology, chemistry and...

Dryden Aqua: we want to make the world a little better The mission of Dryden Aqua is to make the world a little better and we start by making swimming pools safer and environmentally sustainable. We are committed to fighting against pollution and to protect our environment from climate change. We are convinced to have found the main mechanism of global warming. In brief, our hypothesis is as following: The increase in the CO2 content in the atmosphere is not directly related to the increased CO2 from anthropogenic emissions. Scientific studies quantify that the burning of fossil fuels only...

Pool Water Treatment: physical, chemical and biological facts Filter performance / Filtration speed By reducing the filtrationspeed from 30 m/hr to 15 m/hr the performance is increasing by a factor 4. Filter performance % Biological: biology of sand filters Sand filters are mechanical as well as biological filters. One m3 of sand has a surface area of 3‘000 m2. Individual planktonic bacteria floating in the water are oxidised by low concentrations of chlorine in less than 30 seconds. Nevertheless, we will still find bacteria growing in any swimming pool. How is that possible? When bacteria...

Chemical-biological: formation of chloramine • Volatility: The most dangerous chlorine disinfection by-products are those that are volatile because they will escape the water as a gas. The chlorine smell in swimming pools is not chlorine but a volatile gas called trichloramine (NCl3). This gas causes skin and eye irritation and is most hazardous to the lungs. The human lung is very efficient for gas exchange with over 70 m2 surface area. Trichloramine causes irritation and strips the protective mucous lining from the lung. Trichloramine will cause skin, eye and lung irritation but it does...

DAISY Dryden Aqua integrated system for crystal clear and healthy swimming pool water Dryden Aqua has developed an integrated pool water treatment system in which all of the components work together to provide a system in which the performance is far greater than the sum of the parts. As a marine biological company working in the pool industry, we have a unique knowledge of both water chemistry and biology. This knowledge combination has allowed us to design a fully integrated system that provides the best possible water quality with the lowest compliment of bacteria. The result is very...

What makes AFM® as effective? 1. Clean Green glass: For AFM®, we only use green glass bottle banks and surplus glass from glass kilns as our raw material in order to insure purity and traceability. AFM® is manufactured from pure green glass because only green glass has the chemical and physical properties required by AFM®. 2. Ideal hydraulic properties: The raw material is cleaned, washed, sterilised and then reduced in size to a precise particle size, shape and particle size distribution. The correct shape is crucial for the outstanding hydraulic characteristics of AFM®. Glass beads or...

AFM® operating criteria: Recommended filtration speed: 15 - 30 m/hr AFM operates over a wide range of water flows but like any filtration media, performance improves as you reduce the flow rate. For swimming pool water filtration the flow should be between 15 - 30 m/hr however we recommend flows less than 22 m/hr for best results. AFM® is a mechanical filtration media and will remove particles down to 5 microns at a water flow of 20 m/h. However in addition to acting as a mechanical filter media, AFM® also adsorbs micron and sub-micron particles as well as heavy metals and dissolved...

Step 2: Optimal coagulation and flocculation with APF and ZPM AFM® will remove most particles down to 5 microns and many micron and sub-micron particles as well as dissolved organic components. When AFM® is combined with a cavitating ZPM static mixer using APF (All Poly Floc), the performance is greatly enhanced. The combined system now gives nominal filtration down to 0.1 microns that is a 50 times better filtration. In addition, it removes most of the dissolved organic matter and reduces chlorine oxidation demand by up to 80 %. Why is this so important? Less consumption of chlorine = less...

ZPM: Zeta potential mixer ZPM stands for Zeta Potential Mixer. They are manufactured from 316 grade stainless steel for freshwater and a combination of plastic and titanium for marine applications. The ZPM is flanged into the pipework and as the water passes through the ZPM, it is violently mixed and cavitated. A ZPM is essential for the APF coagulation reactions but it also has other benefits. The ZPM splits the water molecule as well as dissolved oxygen to generate free radicals and to increase the redox potential. The Dryden Aqua ZPM therefore increases the oxidation potential and drops...

ACO – active catalytic oxidation into the ZPM after the filters ACO stands for Active Catalytic Oxidation and is unique to Dryden Aqua. ACO contains several components, one of which is a catalyst supporting the natural photo oxidation from UV light. The energy of the sun or UV light is catalysed by ACO to form free radicals to disinfect pool water. The radicals work just like chlorine to remove pollutants but they do not form combined chlorine. ACO has three primary functions: 1. Oxidation enhancer, makes chlorine and other oxidising agents work better 2. Protect chlorine from photolysis 3....