Leading global manufacturer of water filtration media.
Marine biologists, experts in biological and physio-chemical reactions in water.
To enhance water quality for drinking, wastewater treatment, aquaria, aquatic life support systems, and swimming pools worldwide through innovative, sustainable and cost-effective water treatment solutions
To provide clean water for all and to help create a healthy environment for future generations.
Marketing
Operations Director Scotland
Customer Service Scotland
Customer Service Scotland
Production Manager Scotland
VP Business Development Southeast Asia
Dr. Howard Dryden is the founder of Dryden Aqua Ltd and a marine biologist from Edinburgh.
The company was established based on his PhD research on molecular sieve ion exchange and zeolitic sand filtration systems for closed-system aquaculture, as well as the development of intensive aquaculture technology.
Dr. Dryden possesses a unique combination of expertise in biology, chemistry, and technology. He is the inventor of the activated, bio-resistant filter media AFM®.
Dr. Dryden is recognized as one of the world’s leading experts in sustainable water treatment.
Büsserach, Switzerland
Bonnyrigg, Scotland
Dallas, TX, U.S.A
Weimar (Lahn), Germany
We have built the world’s most sophisticated and sustainable glass processing factories
Our production is 100% energy self-sufficient, using up to 1.2 gigawatts of solar power annually.
AFM® is cleaned with rainwater in a closed-loop system and sterilized, resulting in only 5 g/ton of organic contamination versus 20,000 g/ton in normal glass sand.
Waste (metal, paper, plastic) and non-target product (flint glass, CSP, fines) is separated and recycled or used in other industries.
Sludge is responsibly disposed of or sold to biogas companies to produce green electricity
We only use green and brown glass in the manufacture of AFM® because white glass does not contain the metal oxides needed to make the media self-sterilising.
That is why we have invested 1.5 million euros in the most modern colour sorting machines in the world. AFM® contains more than 98% green and brown glass.
We use special soft-crushers to break the glass gently and achieve the desired particle shape while ensuring it has no sharp edges that can injure you or damage the filter.
One of the largest sieving machines in the world ensures perfect sieving to get a precise and consistent particle size and shape.
The raw AFM® goes through a precise and consistent particle size and shape.
The Activation is the reason for its bio-resistance and superior filtration properties.
Dr. Howard Dryden researched the provenance of chlorine disinfection by-products at university more than 30 years ago and developed this unique process to stop their development at source.
SELF-SUFFICIENT:
To run our factory, we produce
100% of our own power using solar
panels and heat recovery systems.
We remove all ferrous and non-ferrous metal pieces using powerful magnets
The recycled glass goes through a first crusher to break oversized pieces
All papers and plastics are extracted with the use of specific blowers
SUSTAINABLE:
The rain water we use to wash the glass follows a unique “sustainable loop” at the end of which we can reuse it to wash more glass!
A dewatering screener is used before sending the glass to the dryer
ZERO WASTE:
The sludge we receive from the washing process is sent to a biogas company and used to produce electricity.
We only use green and brown glass in the manufacture of AFM® because white glass does not contain the metal oxides needed to make the media self-sterilizing.
AFM® contains more than 95% green and brown glass.
The raw AFM® goes through a unique three-step chemical and thermal activation process.
The Activation is the reason for its bio-resistance and superior filtration properties. The surface of AFM® is negatively charged. The surface of AFM®ng becomes hydrophobic (neutral charge).
AFM® is manufactured under ISO9001-2015 conditions and is certified under DWI EC Reg31, NSF/ANSI 50, NSF/ANSI/CAN 61 by WQA for swimming pools and potable water use and HCAAP certified for food and drinks markets
No. 16 Heqing Road
Tsuihang New District, Zhongshan City,
+86 189 3870 1176
