TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The system further comprises: a photosynthetic biomass growth chamber, which is in processable communication with the separator, so that it is functionally operable for receiving a portion of the carbon dioxide produced in the fermenting chamber, and it utilizes the carbon dioxide together with radiant energy, to grow biomass; a pressure swing adsorption generator, which is in processable communication with the motive and reactive gas mixture supply and stream, where it is operable for supplying an oxygen component of the motive and reactive gas mixture supply and stream; a biomass pre-processing unit operable for pre-processing at least some of the biomass being fed into the gasifier, and operable for rendering the biomass more amenable to gasification; a blending unit, which is in processable communication with the fermenting chamber and operable for blending at least a portion of the alcohol produced in the chamber with fuel to yield a blended fuel; and Fischer-Tropsch synthesis chamber in processable communication with the fluidized bed gasifier, so that a portion of the syngas produced in the gasifier can be directed to the Fischer-Tropsch synthesis chamber, where it can be processed into synfuel. In the system, the photosynthetic biomass growth chamber is placed in processable communication with the gasifier, so that at least portion of the biomass grown in the photosynthetic biomass growth chamber can be directed into the gasifier. The system is engineered and operated, to minimize the nitrogen content of the motive and reactive gas mixture supply and stream.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: In the method: the step of directing involves a separation sub-process for separating carbon dioxide from other fermentation products; a pressure swing adsorption oxygen generator is used to supply oxygen component to the motive and reactive gas stream; the biomass is preprocessed before being gasified; a deliberate effort is made to minimize nitrogen content in the motive and reactive gas stream mixture; and the microorganism population used to drive the fermentation comprises Clostridium ljungdahlii, Clostridium autoethanogenum, or Clostridium carboxidivorans P7T. The method further comprises: channeling a portion of the carbon dioxide produced during the fermenting step to a photosynthetic sub-process for generating biomass, which is directed into the gasifying step; blending the produced ethanol with fuel to yield a blended fuel; and synthesizing hydrocarbons via Fischer-Tropsch synthesis with a portion of the syngas produced in the step of gasifying, where the hydrocarbons comprise Fischer-Tropsch product species operable for use as synfuels, and the product species are blended with the produced ethanol to yield a blended synfuel. EXAMPLE - No suitable example given.