WASTEWATER TREATMENT SYSTEM

Abstract

WASTEWATER TREATMENT SYSTEM The invention relates to a wastewater treatment system (10) by phytoremediation comprising at least one tank (12) having a bottom (13) and at least one side face (14), characterized in that each tank (12) comprises, from said bottom (13): - a first layer (16) of at least one divided solid material (15) having a particle size between 20 mm and 40 mm, said first layer (16) having a thickness between 100 mm and 250 mm, - a second layer (18) comprising at least 50% by volume of expanded perlite (17) having a particle size between 2 mm and 8 mm, said second layer (18) having a thickness between 600 mm and 1250 mm, - a third layer (21) of at least one divided solid material (20) having a particle size less than 60 mm, said third layer (16) having a thickness between 50 mm and 250 mm. Figure for the abbreviation: Figure 1

Claims

Demands

1. A wastewater treatment system (10) by phytoremediation comprising at least one tank (4, 6, 8, 12, 80) having a bottom (13) and at least one side face (14), said system being characterized in that each tank (4, 6, 8, 12, 80) comprises, from said bottom (13): - a first layer (16) comprising at least one divided solid material (15) having a particle size between 20 mm and 40 mm, said first layer (16) having a thickness between 100 mm and 250 mm, - a second layer (18) comprising at least 50% by volume of expanded perlite (17) having a particle size between 2 mm and 8 mm, said second layer (18) having a thickness between 600 mm and 1250 mm, - a third layer (21) comprising at least one divided solid material (20) having a particle size of less than 60 mm, said third layer (16) having a thickness between 50 mm and 250 mm, - at least one inlet (32,33, 37, 38) of said wastewater configured to allow circulation of said wastewater through said second layer (18), - at least one outlet (44, 46) closer to the bottom (13) of said tank (4, 6, 8, 12, 80) than said inlet (32, 33, 37, 38), - at least one ventilation column (55) extending at least partially within said second layer (18) and to a ventilation outlet disposed outside said first, second and third layers.

2. System according to claim 1, characterized in that each tray (4, 6, 8, 12, 80) comprises at least two trees (52) belonging to the Salicaceae family.

3. System according to any one of claims 1 or 2, characterized in that said second layer (18) comprises at least 60% by volume of expanded perlite (17).

4. A system according to any one of claims 1 to 3, characterized in that said second layer (18) comprises between 10% and 40% by volume of sand, the sand and expanded perlite being distributed in a substantially homogeneous manner within said second layer (18).

5. System according to any one of claims 1 to 4, characterized in that said second layer (18) comprises 20% by volume of sand and 80% by volume of expanded perlite (17) having a particle size between 2 mm and 8 mm.

6. System according to any one of claims 1 to 5, characterized in that said expanded perlite has a density of less than 200 kg / m3 and a porosity of at least 80%.

7. System according to any one of claims 1 to 6, characterized in that it comprises at least two bins (4, 6, 8, 12).

8. System according to any one of claims 1 to 7, characterized in that it comprises a dispersion system (40) connected to said inlet mouth (32), said dispersion system extending within said second layer (18) or between said second layer (18) and said third layer (21).

9. System according to any one of claims 1 to 8, characterized in that said inlet (32, 33, 37, 38) is connected upstream to a wastewater outlet of a cesspool receiving wastewater from a building.

10. System according to any one of claims 1 to 9, characterized in that it comprises a single tank (80) configured to be able to receive a cesspool (90).

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