Biological water purification
“The biological pool is a Nature-based Solution, NbS, which addresses the water and health safety of bathing water from an ecosystemic approach. It applies natural processes as a basis for preserving pool water in optimal conditions for bathing and reduces all the impacts of standard treatments while contributing to maintaining freshwater biodiversity by restoring aquatic ecosystems.”
In other words, people and nature benefit simultaneously thanks to the purification of water with purely biological-mechanical processes.
If optimum water transparency (natural pool, category 4-5) is the planning objective, rapid biological filters are used. Biofilm, a colourful community of microorganisms that take on the role of zooplankton and aquatic plants, grows on surfaces exposed to strong currents.
The biofilm filters algae and bacteria from the water and binds nutrients. Filters must be equipped with a rinsing device in order to be able to collect the biofilm and thus remove stored nutrients from the closed system of the natural pool.
BIOFILM