Our research "zero dismissal"


Currently, the systems of known purification have some ecosystems in an artificial manner reproduced only in part.

Whatever is the technique employee, a liquid residual always results more or less extract from it in polluting elements.

The plants have the vital necessity to evaporate the present water in soil. One calls this faculty the evapo-perspiration .

The objective is the mastery of this evapo-perspiration by the knowledge and the use of complex ecosystems in order to eliminate the liquid residues of some industrial processes.

These ecosystems associate a flora and a fauna - implanted on a specific substratum - adapted to the sewage to treat.


System of evapo-perspiration the different components

Four essential components constitute a complete system:

The sewage:
Of which the nature and the composition must perfectly be known

The substrata:
Whose role won't only be the one of support

The microbial and entomological cortege (bacteria, planktons, bugs)
Who will get settled spontaneously or will be encouraged voluntarily


The sewage

It must be landed on two main criterias:

The hydraulic load (daily, monthly, yearly volume)

The chemical load (concentration and nature), the D.B.O (Biochemical Demand in Oxygen) are good indicators of polluting load.

But his/her/its value doesn't define the reasons of the demand.

It is therefore important to know the precise nature of the loads composing the sewage.

The set of these data will permit a precise dimensionality of the installation.


The substrata

They constitute the main support of the biologic activity.

They play a physical filter role but as chemical by their adsorbent power.

The manufacture of the substrata and the positioning of the different horizons are primordial to the good working of the system.


The microbial and entomological cortege

The main role of the microbial flora is the transformation of the load molecules, the big agglomerates being decomposed previously by the bugs and other invertebrates.

The bacteria are the more represented, they consume the carbon for the production of their own energy, of the oxygen for their breathing, and a set of mineral elements whose quantities are clean to every species.

According to a situation aerobe or anaerobic, the micro-organisms will act differently on the sewage.


The plants

They are chosen for their growth, their requirements in nourishing elements, their capacity to live in surroundings loaded of pollutants and especially for their faculty to accumulate in their cloths of the substances targeted in report to the loads of the sewage to treat.

They will be parking of the elimination of most polluting compounds by export of their biomass, and especially of the evapo-prespiration of water constituting the biggest part of the sewage.


Notions of phytoremediation

The phytoremediation exploits the capacity of some plants to hyper-accumulate the present compounds in soil or their middle of life.

The general principle is to export the polluting elements periodically by the harvest of the biomass produced.

He/it is recognized today about 400 hyper-accumulators plants and therefore capable to develop itself/themselves in extremely loaded surroundings.

The plant loss is easier and less costly to treat than the sewage or the material polluted himself.


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