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.

PHYTOPLACTON
The base of the trophic pyramid is formed by:
-Bacteria and fungi: mainly organic matter decomposers
-Protozoa: main consumers that feed on bacteria, algae and other microorganisms
-Algae: Remove nutrients from the water.
Biomass forms and produces oxygen

ZOOPLACTON
Zooplankton is the next level in the chain. It is composed mainly of small crustaceans that continually filter and eat algae and bacteria from the water.
Therefore, they are an important element in "hygiene performance", playing a great role in the elimination of pathogenic germs.

LARVAE
Zooplankton is eaten by insects and their larvae, as well as by newt larvae and small fish.
Small fish that multiply rapidly without other predators (invasive gambusia) can deplete the zooplankton to the point that it fails as a natural regulator of phytoplankton. This leads to strong algae blooms and green water, which is why no fish are used in the swimming pond or natural pool.

MACROFYTH PLANTS
Underwater plants play a prominent role in fixing phosphorus (nutrient limiting: its availability limits biological productivity)
They compete with algae for the available nutrients in the water, helping to reduce the levels available in the water, limiting algae growth and keeping the water clear.

SEDIMENTS
The organic sediment, mainly found in the plant zone and made up of dead leaves, pollen, dust, etc., is broken down and mineralized by microorganisms, releasing the bound nutrients back into the water cycle.
By sucking up the sediment, which is used as a natural fertilizer, large quantities of nutrients are removed from the cycle.