Patent ID: 7329539

Claim:
A bioreactor comprising: a culture drum in which microorganisms are cultured; a supplier for supplying a culture solution, and organic and inorganic media to the culture drum, the supplier including a supply tube connected to an upper side of the culture drum, and a pump connected to the supply tube for supplying the culture solution to the culture drum; an agitator for agitating the culture solution by spraying air to the culture solution in the culture drum, the air being supplied from an air blower, wherein the sprayed air provides a controlled circulation pattern for the culture solution; and a thermostatic controller for controlling a temperature of the culture solution and disinfecting the interior of the culture drum, the thermostatic controller including at least a heater provided in the culture drum, and a heater controller; wherein the agitator includes an air supply hose which is vertically provided along the sidewall of the culture drum and connected to the air blower; two branch lines which are extended from the air supply hose to the inside of the culture drum through the sidewall of the culture drum; an upper and a lower ring-shaped injection pipe which are provided at the end of the branch lines; a first group of injection nozzles which are located at the outer surface of the upper injection pipe, and are extended from the outward direction to the downward direction along the outer circumference of the ring-shaped injection pipe; and a second group of injection nozzles which are located at the outer surface of the lower injection pipe, and are extended from the inward direction to the upward direction along the outer circumference of the ring-shaped injection pipe.