Patent ID: 7183074

Claim:
A gas dual-dynamic solid state fermentation method characterized in that, solid materials to be fermented are placed in an air environment with pulsating pressure and cyclic flow to undergo solid state fermentation by the steps comprising: a. injecting germ-free air into a fermentor tank through an electromagnetic inlet valve to control the pressure in the tank within the range from 1.5 to 3.5 kg/cm 2 ; b. closing the electromagnetic inlet valve after the tank pressure reaches a set value, and maintaining the tank under pressure for 1 to 5 minutes; c. opening an electromagnetic outlet valve to let air flow out of the tank until the pressure in the tank reaches 0.1 to 0.5 kg/cm 2 ; d. closing the electromagnetic outlet valve and maintaining the tank pressure for 10 to 60 seconds; and e. repeating steps a–c.