| abstract |
PCT No. PCT/JP96/02454 Sec. 371 Date Aug. 7, 1997 Sec. 102(e) Date Aug. 7, 1997 PCT Filed Aug. 30, 1996 PCT Pub. No. WO97/12987 PCT Pub. Date Apr. 10, 1997The present invention relates to a process for the production of cellulosic material which comprises culturing a cellulose-producing bacterium while maintaining the internal pressure within the fermentation tank at about 1.1 kg/cm2 A or more, preferably at about 1.2 kg/cm2 A or more, more preferably at about 1.5 kg/cm2 A or more, generally in the later stage of the cultivation (the growth decline phase and stationary phase), namely, at the stage where a concentration of the cellulosic material in a culture medium reaches about 10 g/L or more, preferably about 12 g/L or more; at the culturing stage where an apparent density of the culture medium at 10 rad/s or 1 l/s reaches about 10 Pa.s or more; at the culturing stage where the K value (consistency index) reaches about 10 Pa.sn or more considering that rheology follows the Power law model; or at the stage where the oxygen-demand of the culture medium reaches about 35 mmol/L.hr or more. |