Patent ID: 8551740

Claim:
A method for simultaneously producing tubular microbial cellulose of different diameters, comprising the following steps: preparing a liquid medium having cellulose-producing microorganisms in a container; horizontally rotating multiple hollow tubes that are fitted together concentrically at an interval from one another, such that each of the hollow tubes is alternately partially immersed in the liquid medium and partially exposed above the horizontal surface of the liquid medium, so as to allow the microorganisms to form microbial cellulose on an outer surface of each of the hollow tubes, as well as forming sheets of microbial cellulose on a horizontal surface of the liquid medium not being disturbed by the hollow tubes in the container; and removing the microbial cellulose from the outer surfaces of each of the hollow tubes, to simultaneously obtain tubular microbial cellulose of different diameters; wherein each of the hollow tubes has a rough outer surface and a smooth inner surface.