Carex of Sweden AB

We care for water

Hem » The process

The process

For millions of years, nature has developed its own purification methods as part of the earth's cycle, and this is also how our process works. Carex's expertise is based on collective interdisciplinary research on the biological processes that take place in natural marine ecosystems, where microorganisms interact in plant microbial nutrients. The system is based on biomimetics, which means that we imitate nature's own purification process in a compressed plant where the process is accelerated. What takes nature between 2 - 4 months in a lake or a stream, takes 12 - 24 hours in our facilities.

The plants produce no residual products and no excess sludge. The system consists of tanks that are placed underground outdoors, pumps for oxygenation and circulation of the water, as well as an innovatively designed biostructure for microbial growth, so-called biofilm. The system is weather independent and requires minimal maintenance.

TreeWell in the fall

How it works

Biological purification and decomposition of organic material require good microbes and enzymes. The treatment plant has a combination of the good microbes - bacteria, fungi and protozoa - which is the key to the purification process. The bacteria in polluted water are consumed by protozoa / ciliates or dissolved by so-called bacteriophages. Effective decomposition of organic material takes place under optimal conditions that mimic processes in marine ecosystems.

THE WATER ENVIRONMENT IN THE FIRST TANK circulates in a slow flow. Here sedimentation and decomposition of the sludge takes place, consumed by the good microbes or broken down by its enzymes in a microbial interaction. The sludge thus functions as a protein-rich food for the microbes instead of becoming a residual product that must be taken care of.
In the first compartments of the first tank, natural biological microenvironments - Biofilms - are developed that purify the water. The water is then pumped with a level pump to tank two.

IN TANK TWO, SOMEWHAT HIGHER LOCATED, the environment is rich in oxygen; the water is oxygenated with an air pump that circulates the water in a faster flow. This tank contains water-purifying plants, and the water passes through their root system. The plants absorb nutrients, bind heavy metals and help to break down pollutants that otherwise would end up in the environment - for example drug residues, hormones, cosmetics and more. Microscopic larvae and insects living in the root systems of these plants feed on microbes from the first tank. Visually, the plant module helps the treatment system to naturally melt into its surroundings. It is decorative and shows that the installation is based on natural processes.

Modular and expandable

Our basic systems Carex TreeWell and Carex WashWell can be expanded to handle virtually unlimited amounts of contaminated water. The modules are then connected in a network that can be supplemented with expanded pump systems and tanks for storage of incoming water. Something that is used in WashWell when it is connected to car washes, which are used most frequently in daytime. Contaminated water is then stored in the tank while waiting for periods of lower activity and is purified when the car wash is inactive at night.