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Photobioreactor in a closed environment for cultivating photosynthetic micro-organisms

A technology for photobioreactors and photosynthetic microorganisms, applied in photobioreactors, specific-purpose bioreactors/fermenters, combinations of bioreactors/fermenters, etc., can solve the problems of combining multiple light sources, reducing intensity, Issues hindering the optimization of biomass growth methods

Inactive Publication Date: 2012-10-17
アクタアルガ
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Problems solved by technology

[0016] The main disadvantage of this approach is that it is only suitable for obtaining low (light production) / (effective light) yields
In fact, the intensity is reduced due to the interface between the light source and the waveguide, and it is difficult to combine multiple light sources on the same fiber
Furthermore, the problem that arises once multiple different wavelengths are used is that, in fact, in order to extract light from an optical fiber immersed in a medium, a surface treatment (roughness) is required to diffuse and diffract a portion of the guided light
There is an additional issue of photobioreactor cost if the light source needs to be scaled up
[0022] A third problem consists in obtaining a uniform illumination front in intensity in the reactor growth volume
This hinders the optimization of biomass growth methods for a given overall incident light energy

Method used

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  • Photobioreactor in a closed environment for cultivating photosynthetic micro-organisms
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  • Photobioreactor in a closed environment for cultivating photosynthetic micro-organisms

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Embodiment Construction

[0093] A photobioreactor according to the present invention will be described with reference to the accompanying drawings.

[0094] Figures 1 to 5 is the energy emission diagram. Quasi-point LEDs emit energy in a "Lambertian" pattern (lobes). Most of the energy is emitted perpendicular to the surface of the semiconductor. This energy is reduced on the way out of the normal to the semiconductor. It is not parallel to the surface. By increasing the base lobe, the emitting surface can be extended beyond the natural lobe width to form an energy-constant emitting surface in a plane (xOy) parallel to the semiconductor surface. In the figure, the LED or photovoltaic cell is O-centered and its surface is oriented perpendicular to (Oz). Sections of these lobes are shown along the plane (xOz).

[0095] figure 1 Emission plot representing an LED located at the reference center. Assume that the negative pole is on point (less than 1 square millimeter in size). Consistency exist...

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Abstract

The invention relates to a photobioreactor for cultivating photosynthetic micro-organisms, comprising: a) at least one cultivation container (1) for containing the culture medium (3) of the micro-organisms, b) photovoltaic cells (2) isolated from the culture medium (3), emitting light towards the culture medium (3), and c) means (4) for powering the photovoltaic cells (2) in order to operate the photovoltaic cells in light emission mode.

Description

technical field [0001] The present invention relates to continuous intensive cultivation of photosynthetic microorganisms. Background technique [0002] Microalgae are photosynthetic plant organisms in which metabolism and growth require, inter alia, CO 2 , light and nutrients. [0003] It is well known that the industrial cultivation of microalgae has a variety of applications. [0004] Microalgae can be cultivated to reuse and purify carbon dioxide, NOx and / or SOx emitted from some industrial plants (WO2008042919). [0005] Oil extracted from microalgae can be used as biofuel (WO2008070281, WO2008055190, WO2008060571). [0006] Microalgae can be cultured for the production of omega-3 fatty acids and their polyunsaturated fatty acids. [0007] Microalgae can also be cultured to produce pigments. [0008] Large-scale industrial cultivation of microalgae uses the sun as a light source. For this purpose, the microalgae are usually placed in open tanks ("raceways") with o...

Claims

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Application Information

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IPC IPC(8): C12M1/00
CPCC12M43/08C12M21/02C12M31/10Y02P20/59C12M31/08C12M41/12C12M1/00C12M3/02C12N1/12C12M23/22
Inventor J·布古安M·科宁A·弗里德里彻孙国才
Owner アクタアルガ
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