NOVELTY - The photo-bioreactor system comprises a reactor container (210) having an interior space that is configured to receive and to hold a fluid medium for growing photosynthetic organisms, a light source (220) that is coupled to the container and that is configured to illuminate some of the photosynthetic organisms in the fluid medium, a fluid circulation system (230), a photosynthetic organism harvester (250), a nutrient supply system, a nutrient recovery system, a monitoring system, a control system, a cleaning system, a vent system, a heat exchanger, and a maintenance bridge.    USE - The photo-bioreactor system is useful for growing and harvesting photosynthetic organisms such as algae, which are useful : as a source of fatty acids, proteins and other bio-chemicals in a production of nutraceuticals, health food, food additives, vitamins, pharmaceuticals, and natural dyes; as an animal feed supplement with nutritional value equivalent; as a biological control of agricultural pests; as soil conditioners and biofertilizers in agriculture; for production of oxygen and removal of nitrogen, phosphorus and toxic substances in sewage treatment; for biodegradation of plastics; as a renewable biomass source for production of a diesel fuel substitute such as biodiesel and other biofuels such as ethanol, methane gas and hydrogen; and for scrubbing carbon dioxide, nitrogen oxide (NOx), vanadium oxide (VOx) from effluent released during the production of fossil fuel.    ADVANTAGE - The photo-bioreactor system efficiently, economically and rapidly grows and harvests the photosynthetic organisms with increased density, high yield and mass productivity and less energy consumption thus providing the biomass products with improved reliability, durability and scalability.    DETAILED DESCRIPTION - The photo-bioreactor system comprises a reactor container (210) having an interior space that is configured to receive and to hold a fluid medium for growing photosynthetic organisms, a light source (220) that is coupled to the container and that is configured to illuminate some of the photosynthetic organisms in the fluid medium, a fluid circulation system (230), a photosynthetic organism harvester (250), a nutrient supply system, a nutrient recovery system, a monitoring system (270), a control system, a cleaning system, a vent system, a heat exchanger, and a maintenance bridge. The light source comprises a first array of light-emitting panels and a second array of light-emitting panels. The light-emitting panels extends into the container, divides the interior space of the container into cell passages. Each of the light-emitting panels has a first light-emitting surface and a second light-emitting surface positioned on opposing sides of the light-emitting panel. The fluid circulation system is coupled to the container, and is configured to force a continuous flow of the fluid medium through the cell passages. The continuous flow follows a serpentine flow path and a parallel flow path. The serpentine flow path includes a flow path segment extending along the first light-emitting surface, a flow path segment passing around a distal end of the light-emitting panel, and a flow path segment extending along the second light-emitting surface. The parallel flow path includes a first flow path segment extending along the first light-emitting surface and a second flow path segment extending along the second light-emitting surface. INDEPENDENT CLAIMS are included for:    (1) a light-emitting panel; and    (2) a method for growing and harvesting photosynthetic organisms.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a photo-bioreactor system.    Reactor container (210)    Light source (220)    Fluid circulation system (230)    Harvester (250)    Monitoring system. (270)