NOVELTY - An energy efficient system for obtaining biomass of photosynthetic microorganisms, comprises: a set of gas injection; a water tank (10); water pump (13); a filter (14) connected to the outlet of the water pump (13); a set of supply of nutrients; at least a first photobioreactor for inoculum (41) of vertical column and bubbling type; at least a second photobioreactor for inoculum (43) of vertical column and bubbling type; a set of crop photobioreactors (50) connected in parallel to the nutrient supply assembly and the gas injection assembly.    USE - The energy efficient system is useful for obtaining biomass of photosynthetic microorganisms (claimed).    ADVANTAGE - The energy efficient system is energy efficiency and can be used for large-scale economic feasibility for obtaining photosynthetic microorganism biomass based on a photobioreactor that meets optimal internal turmoil, optimal route light and optimizing the production of biomass per area of land used.    DETAILED DESCRIPTION - An energy efficient system for obtaining biomass of photosynthetic microorganisms, comprises: a set of gas injection; a water tank (10); water pump (13); a filter (14) connected to the outlet of the water pump (13); a set of supply of nutrients; at least a first photobioreactor for inoculum (41) of vertical column and bubbling type with a diameter less than 50 mm; at least a second photobioreactor for inoculum (43) of vertical column and bubbling type with a diameter less than 100 mm; a set of crop photobioreactors (50) connected in parallel to the nutrient supply assembly and the gas injection assembly, where each comprises: a transparent panel (500) formed of two transparent sheets (505) with a gap between them, arranged vertically and parallel transparent subdivisions (501) that define transparent cell (502), where each transparent cell (502) has a upper opening (503) and a lower opening (504), where the thickness of the transparent panel of cells is less than 2 cm, lower recirculation chamber (510) in fluid communication beneath the lower openings (504) of transparent cells (502), upper recirculation chamber (520) in fluid communication on the upper openings (503) of transparent cells (502), a gas distribution tube (530) disposed externally on the lower edge of the transparent panel (500); in where the gas distribution pipe (530) comprising gas nozzles (531) disposed in fluid communication with the interior of a set of the transparent cell (502), and a support structure which supports the transparent panel (500), the lower recirculation chamber (510), the upper recirculation chamber (520) and the air distribution tube, and a set of collecting tanks (60), each connected to a photobioreactor culture (50). An INDEPENDENT CLAIM is a photobioreactor for a more energy efficient system for obtaining biomass of photosynthetic microorganisms, comprising: a transparent panel (500) formed of two transparent sheets (505) with a gap between them, arranged parallel vertical subdivisions transparent (501) that define transparent cell (502), where each transparent cell (502) having an upper opening (503) and a lower opening (504), where the thickness of the transparent panel is less than 2 cm; lower recirculation chamber (510) in fluid communication beneath the lower openings (504) of transparent cells (502); upper recirculation chamber (520) in fluid communication on the upper openings (503) of transparent cells (502); one gas delivery tube (530) disposed externally on the lower edge of the transparent panel (500), where the gas delivery tube (530) comprising gas nozzles (531) disposed in fluid communication with the interior of a the set of transparent cells (502), and a support structure which supports the transparent panel (500), the lower recirculation chamber (510), the upper recirculation chamber (520) and the air distribution pipe (530).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an energy efficient system.    Water tank (10)    Water pump (13)    Filter (14)    Inoculum (41)    Photobioreactors (50)