A MULTILAYER PANEL COMPRISING BIOFILM TO REDUCE EVOPARATION IN DAMS

Abstract

The invention relates to a biofilm based panel that is developed for reducing evaporation in dam reservoirs, and allows biomass production. The biofilm based panel of the invention comprises in general three main layers, a support layer (4), a nutrient layer (2) and a biofilm layer (1). Based on the climate in which the dams are located, a heat storage intermediate layer (3) may also be added. The support layer (4) is the top layer. The developed panel is positioned such that it partially covers the water surface.

Claims

1. A multilayer panel for dams, reducing evaporation, characterized by comprising; for covering a part of the surface of liquid a biofilm layer (1) comprising microorganism, cultivated on the surface of the panel facing the liquid, a nutrient layer (2) comprising nutrients for said microorganism, placed on the biofilm layer (1) such that it is positioned adjacent to the biofilm layer (1), a support layer (4) placed on the nutrient layer (2) and at least one floating support (6) carrying said layers in connection with the support layer (4), preventing these layers from contacting with the liquid and enabling the panel to float on the liquid by contacting the surface of the liquid.

2. The panel of claim 1, wherein it comprises a heat storage intermediate layer (3).

3. The panel of claim 2, wherein the heat storage intermediate layer (3) is between the support layer (4) and the nutrient layer (2).

4. The panel of claim 3, wherein the heat storage intermediate layer (3) comprises a PCM material.

5. The panel of claim 4, wherein the PCM material is LiNO3.2H2O.

6. The panel of claim 1, wherein the microorganism is microalgae.

7. The panel of claim 6, wherein the percentage of dry biomass in the microalgae paste is between 15% and 25%.

8. The panel of claim 1, wherein it comprises four floating supports (6).

9. The panel of claim 1, wherein it comprises at least one reflector at its edge for reflecting light on the surface facing the liquid.

10. The panel of claim 1, wherein the nutrients comprise nitrogen (N), phosphor (P), sulfur (S).

11. The panel of claim 1, wherein the nutrients are in solid form.

12. The panel of claim 1, wherein the support layer (4) is the top layer.

Description

DESCRIPTION OF THE FIGURES

[0045] FIG. 1 A detailed view of an embodiment of the invention

[0046] FIG. 2 A side cross-sectional view of an embodiment of the invention

DESCRIPTION OF THE REFERENCE NUMBERS IN THE FIGURES

[0047] 1. Biofilm layer [0048] 2. Nutrient layer [0049] 3. Heat storage intermediate layer [0050] 4. Support layer [0051] 5. Water chamber [0052] 6. Floating support