NOVELTY - Installation for producing biomass by cultivating algae and obtaining biorefined product for production of bio-oil and bioproducts, comprises 1 storage tank of seawater; 1 automatic electric pump; 1 desalination unit; 1 unit of water disinfection; 1 storage tank; 1 UV chamber; 5 nutrient feed tanks; 1 mixing tank; 1 water tank; 1 unit for capturing gases; 1 carbon dioxide (CO2) filtration unit; 1 mixing tank for CO2; 1 cooler and pressure regulator for CO2; 1 air compressor; 1 rectangular structure photounit made of steel; and 5-30 phototubes in each unit.    USE - The installation is useful for producing biomass by cultivating algae and obtaining biorefined product for production of bio-oil and bioproducts (claimed).    ADVANTAGE - The installation for producing biomass generates no waste and does not produce wastewater. The net balance of carbon dioxide (CO2) is zero; and reject water is recycled back to the process after each stage. It uses renewable energy sources for electricity and heat supply (all claimed). The production method allows the possibility, in the installation, for the provision of divisions of the photounits such that it is possible to culture different types of single-cell microalgae, i.e. in the phototubes that make up the units having only one type of single-cell alga. Extractions are performed over cycles of 12 to 16 hours from the first extraction of biomass, and thus the production of bionutrient and bioenergetic products occurs continuously and there is a 95% biomass production yield.    DETAILED DESCRIPTION - Installation for producing biomass by cultivating algae and obtaining biorefined product for production of bio-oil and bioproducts, comprises 1 storage tank of seawater; 1 automatic electric pump; 1 desalination unit; 1 unit of water disinfection; 1 storage tank; 1 UV chamber; 5 nutrient feed tanks; 1 mixing tank; 1 water tank; 1 unit for capturing gases; 1 carbon dioxide (CO2) filtration unit; 1 mixing tank for CO2; 1 cooler and pressure regulator for CO2; 1 air compressor; 1 rectangular structure photounit made of steel; 5-30 phototubes in each unit; 1 phototube supply for each photounit; 1 photocirculator; 1 heat exchanger for each photounit; 1 electric pump for each unit; 1 power unit; 1 inlet valve; 1 inlet valve to supply CO2 and air; 1 pressure releasing valve; 1 gas separator; 1 sensor unit for measuring water level; 1 sensor unit for measuring pH, salinity, temperature, turbidity, CO2, and oxygen and nutrient inlet; 1 densitometer; 1 gauge; 1 outlet phototube; 1 recirculation pipe network for each photounit; 3 artificial lighting lamps for photounit; 1 control panel for photounit; 1 first separation unit; 1 growth storage tank; 1 centrifugation unit; 1 transport unit; 1 collection point; 1 spray drying unit; 1 point collection product spray separator; 1 extraction product unit; 1 fractionation unit; 1 collection point for processed products; and 1 biofuel collection point; and where the method is configured under the following steps: advance preparation: growing; biomass extraction for obtaining products and bionutrient and bioenergetic products, where the injection occurs in stream photounits with sea or brackish water enriched with nutrients and vitamins, in turn, has been previously microfiltered and disinfected; and where the process for obtaining finished products involves first separation; cultivation; centrifugation; spray drying process for preparing the biomass for extraction of products; liquefaction process; and biofuel collection.