ABSTRACT
This chapter investigates the production of iturin by NB22 during the solid-state fermentation (SSF) of okara, a soybean curd residue, which is a by-product of tofu manufacturing. A computer-controlled 7-liter jar fermentor with a standard flat blade turbine impeller was used for the main cultivation of the bacterium. The foam produced during fermentation was freely expelled from the fermentor through a sterilized silicone tube to a foam-trapping unit consisting of a conical flask set up outside the fermentor. Fungi not only in the practical production of enzymes or chemicals, but also in laboratory-scale experiments. The surfactin is different from SSF in that the dissolution rate of suspended okara into water is higher and the free bacteria cells have easy access to the substrate or dissolved nutrients of okara. The extraction procedure of the solid material to extract each component of iturin is much simpler in SSF than in Submerged Fermentation and less solvent is necessary in SSF.
