Methods and devices for remediation and fermentation

• US 6,703,217 B2
• Filed: 01/31/2001
• Issued: 03/09/2004
• Est. Priority Date: 01/31/2000
• Status: Expired due to Term

• Current Assignee: Sartorius Stedim North America Inc. (Sartorius AG)
• Original Assignee: Kinetic Systems Incorporated (Kinetics Holding GmbH)
• Inventors: Herman, Heath H., Cuneo, Robert A., Herman, Tod M., Osborne, Gerard W.
• Primary Examiner(s): Redding, David A.
• Application Number:
  US09/773,027
• Publication Number:
  US 20010044143A1
• Time in Patent Office: 1,133 Days
• Field of Search: 435/41, 435/325, 435/383, 435/394, 435/395, 435/286.5, 435/289.1, 435/286.1
• US Class Current: 435/41
• CPC Class Codes: C12M 25/06 Plates; Walls; Drawers; Multilayer plates
• CPC Class Codes: C12M 27/14 Rotation or movement of the cells support, e.g. rotated hollow fibers
• CPC Class Codes: C12M 41/40 of pressure

Abstract

The present invention comprises novel culture methods and devices in which living cells or subcellular biocatalysts are immobilized in an open chamber defined by two rotating disks. The fluid force of nutrient fluids flowing into the chamber opposes the centripetal force created by rotation of the device to suspend the cells within the chamber and promote cell growth. Use of an open chamber increases the capacity of the device to produce the desired cellular products.

Claims

1. A method of containing a biocatalyst comprising containing the biocatalyst in at least one chamber in a centrifugal force field wherein a continuous flow of a liquid acts to create a force which opposes the centrifugal force field and wherein a gravitational force contributes to the resultant vector summation of all forces acting on the biocatalyst, wherein the gravitational force, the centrifugal force, and the opposing liquid force substantially immobilize the biocatalyst at a position in the chamber and wherein the at least one chamber is formed by a first disk and a second disk each disk being mounted to a rotating shaft.

2. The method of claim 1, wherein the first disk comprises a first contoured face and the second disk comprises a second contoured face.

3. The method of claim 2, wherein the first and second disks are mounted on the shaft so that the first contoured face opposes the second contoured face.

4. The method of claim 2, wherein the first disk and the second disk are mounted on the shaft so that the first disk does not directly contact the second disk.

5. The method of claim 2, wherein the first and second disks are fixed onto the shaft.

6. The method of claim 1, wherein the first and second disks are encased in a housing.

7. The method of claim 6, wherein the liquid is supplied to the at least one chamber through an input tube that penetrates the housing.

8. The method of claim 1, wherein the biocatalyst is a cell.

9. The method of claim 1, wherein the biocatalyst is a subcellular component.

10. The method of claim 1, wherein the step of containing the biocatalyst comprises a plurality of chambers, each of which is formed by a first disk and a second disk.

11. The method of claim 1, wherein the liquid is at hydraulic pressures greater than ambient pressure.

12. The method of claim 1, wherein no gaseous phase is present in the at least one chamber.

13. A method of producing a product from a biocatalyst comprising:

a. containing a biocatalyst in at least one chamber in a centrifugal force field wherein a continuous flow of a liquid acts to create a force which opposes the centrifugal force field and wherein a gravitational force contributes to the resultant vector summation of all forces acting on the biocatalyst, wherein the gravitational force, the centrifugal force, and the opposing liquid force substantially immobilize the biocatalyst at a position in the chamber and wherein the at least one chamber is formed by a first disk and a second disk each disk being mounted to a rotating shaft; and

b. collecting the continuous flow of liquid exterior to the at least one chamber with the product therein.

14. The method of claim 13, wherein the first disk and the second disk are mounted on a shaft to form the at least one chamber between the first disk and the second disk.

15. The method of claim 14, wherein the shaft further comprises an output tube extending along at least a portion of the interior of the shaft.

16. The method of claim 15, wherein the fluid with the product therein exits the at least one chamber through the output tube.

17. The method of claim 13, wherein the step of containing the biocatalyst comprises a plurality of chambers, each of which is formed by a first disk and a second disk.

18. A device for incubating a biocatalyst comprising at least one chamber for containing a biocatalyst suspended in a flowing liquid medium in a centrifugal field, means for opposing the gravitational force and immobilizing the biocatalyst, means for pumping the liquid medium wherein no gas phase is in contact with the medium, and means for maintaining hydraulic pressure of the container at a pressure greater than ambient barometric pressure, wherein the at least one chamber is formed by a first disk and a second disk each disk being mounted to a rotating shaft.

19. The device of claim 18, wherein the first disk comprises a first contoured face and the second disk comprises a second contoured face and the first disk and the second disk are mounted on a shaft so that the first contoured face opposes the second contoured face, thereby forming the at least one chamber between the first disk and the second disk.