TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred System: In the system for obtaining biomass, the transparent panel (500) has a transparency of at least 90%. The thickness of the transparent panel of cells (500) is 1.2 cm. The gas injection assembly comprises: a set of distribution pipes (30); one pressurized air tank (31) connected to the gas distribution pipe (30); a gas inlet (32), such as carbon dioxide (CO2), which is connected to the gas distribution pipe (30), and a set of step control valves (not shown in the figures) to the outputs of the gas distribution pipe (30). The water tank (10) comprises: a water inlet (12), and a water outlet (11) connected to the inlet of the water pump (13). The nutrient supply assembly comprises: supply pond (20) comprising a nutrient inlet (23) a water inlet (22) connected to the filter (14) which receives filtered water from the water tank (10) and an output of nutrients (21) connected to the input of a nutrient pump (24); a nutrient source and a nutrient source connected to the input B of nutrient (23); nutrient the pump (24); a set of nutrient distribution pipe (25) which is connected to the output of the nutrient pump (24); a first valve (26) to a first photobioreactor of inoculum (41); a second valve (27) for one second photobioreactor of inoculum (43), and a set of supply valves for a set of culture photobioreactors (50). The nutrient assembly comprises: supply pond (20) comprising a nutrient inlet (23) a water inlet (22) connected to the filter (14) which receives filtered water from the water tank (10) and an output of nutrients (21) connected to the input of a nutrient pump (24); a nutrient source and a nutrient source connected to the input B of nutrients (23); nutrient the pump (24); a set of nutrient distribution pipe (25) which is connected to the output of the nutrient pump (24); a first valve (26) to a first photobioreactor of inoculum (41); a second valve (27) for one second photobioreactor of inoculum (43), and a set of supply valves to a set of photobioreactors culture (50). The first photobioreactor for inoculum (41) comprises: a supply inlet (41a) connected to the first valve (26); one gas injection inlet (41b) connected to the gas distribution pipe (30) through one of the set of step control valves; collecting output inoculum (41c) which discharges into a first inoculum collection tank (42), and the first inoculum collection tank and livestock wastes (42). The second photobioreactor for inoculum (43) comprises: a supply inlet (43a) connected to the second valve (27); one gas injection inlet (43b) connected to the gas distribution pipe (30) through one of the set of step control valves; collecting output inoculum (43c) that is discharged to a second inoculum collection tank (44), and the second inoculum collection tank (44). Preferred Photobioreactor: In the photobioreactor, the gas distribution pipe (530) comprises gas nozzles (531) arranged alternately in one of two transparent cells (502) adjacent and in fluid communication with the interior of the transparent cell (502); and gas nozzles (531) disposed on each transparent cell (502) and in fluid communication with the interior of the transparent cell (502). The lower recirculation chamber (510) comprises an inlet (511) and one output connection (512), such that a set of photobioreactors (50) can be connected in parallel or in series forming a biomass collection system. The transparent panel of cells (500) is one of the following materials: acrylic, polycarbonate or glass. EXAMPLE - No suitable example given.