公开(公告)号：US4478766A

公开(公告)日：1984-10-23

申请号：US477401

申请日：1983-03-21

申请人： Hiroyuki Horikita ,  Tetsuo Kataoka

发明人： Hiroyuki Horikita ,  Tetsuo Kataoka

IPC分类号： B01F3/04 ,  C02F3/20

CPC分类号： C02F3/20 ,  B01F3/04262 ,  B01F2003/04297 ,  Y02W10/15

摘要： An air diffuser has a non-porous rigid plate mounted on an air chamber to permit diffusion of air to the outside of the chamber, which porous plate has a smooth outer surface and diffusing pores extending therethrough, more than 95% of the diffusing pores having diameters within .+-.20% of a nominal diameter selected in a range of 50-300 .mu.m.

摘要翻译： 空气扩散器具有安装在空气室上的无孔刚性板，以允许空气扩散到室的外部，该多孔板具有光滑的外表面并且扩散穿过其中的孔，超过95％的扩散孔具有 直径在50-300微米范围内的公称直径的+/- 20％内。

公开(公告)号：US4923812A

公开(公告)日：1990-05-08

申请号：US373694

申请日：1989-06-29

申请人： Hiroyuki Horikita ,  Nobuo Hattori ,  Yahei Takagi ,  Gaku Kawaguchi ,  Toshihiro Maeda

发明人： Hiroyuki Horikita ,  Nobuo Hattori ,  Yahei Takagi ,  Gaku Kawaguchi ,  Toshihiro Maeda

IPC分类号： C12M1/12 ,  C12P7/18

CPC分类号： C12M47/02 ,  C12M29/04 ,  C12M29/18 ,  C12M47/04 ,  C12M47/12 ,  C12P7/18 ,  Y10S435/813 ,  Y10S435/818 ,  Y10S435/911

摘要： A process is disclosed for continuously producing erythritol by cultivating erythritol-producing microorganisms under aerobic conditions. The process comprises the steps of: maintaining the concentration of dissolved oxygen in a culture broth in a fermentation tank at not less than 0.2 ppm; separating a part of the culture broth into a concentrated liquid in which the concentration of cells is increased and a clarified liquid by a cell separator; returning the concentrated liquid to the fermentation tank; controlling an amount of the clarified liquid to be extracted outside an erythritol-producing system and an amount of the culture broth and/or the concentrated liquid to be extracted outside the producing system such that the concentration of the cells in the culture broth in the fermentation tank may be kept in a range from 40 to 200 g/l when calculated as a weight of dried cells; and recovering erythritol from the clarified liquid.The clarified liquid containing erythritol may be separated from the culture broth by a cell separator arranged inside the fermentation tank, and the extracting amount of the erythritol-containing clarified liquid separated by the cell separator and an amount of the culture broth to be extracted may be controlled such that the concentration of the cells in the culture broth may be kept at 40 to 200 g/l when calculated as a weight of dried cells.