Patent ID: 6013490
Filing Date: 2000-01-11
Classification: C12M,C12P

Abstract:
A method for the production of a bacterial cellulose (BC) comprising cultivating a cellulose-producing bacterium under such apparatus conditions that the oxygen-transfer coefficient (K.sub.L a) of the equation below is about 25 to about 50/hr, said K.sub.L a is determined by employing a simulated suspension containing 2% by weight of bacterial cellulose (BC) and having a plastic viscosity of 15-20 poise: ##EQU3## wherein C.sub.L is the dissolved oxygen concentration in the culture medium (mmol/l), t is time (hr), dC.sub.L /dt is the change in dissolved oxygen concentration over a certain period of time, K.sub.L is the oxygen-transfer coefficient (cm/hr) at a liquid boundary membrane, a is the area of gas-liquid interface per unit volume (cm.sup.2 /cm.sup.3), and C* is the dissolved oxygen concentration (mmol/l) in equilibrium with the partial pressure of oxygen in air bubbles.