Filtration systems and methods for manufacturing biologically-produced products

Patent metadata

Field	Value
Publication number	US-10987636-B2
Application number	US-201816120200-A
Country	US
Kind code	B2
Filing date	Aug 31, 2018
Priority date	Aug 31, 2017
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

Aspects of the present disclosure relate to filtration systems and methods for production of biologically-produced products, which may include pharmaceutical and/or protein products. Certain biomanufacturing systems described herein comprise a bioreactor (e.g., a perfusion bioreactor, a chemostat) and a filter probe comprising a filter bundle comprising a plurality of hollow fibers (e.g., longitudinally aligned hollow fibers). According to some embodiments, a center-to-center distance between any two hollow fibers within the fiber bundle at one or more points along a length of the fiber bundle is relatively large (e.g., greater than or equal to an average outer diameter of the hollow fibers of the fiber bundle, greater than or equal to 1.1 times a minimum diameter of the two hollow fibers). In some embodiments, the hollow fibers within the fiber bundle are arranged in an array (e.g., a hexagonal, linear, annular, or square array).

First claim

The invention claimed is:

1. A filter probe, comprising:
a fiber bundle comprising a plurality of hollow fibers,
wherein a center-to-center distance between any two hollow fibers within the fiber bundle at one or more points along a length of the fiber bundle is greater than or equal to 1.1 times a minimum diameter of the two hollow fibers,
wherein the filter probe has a diameter of about 25 mm or less and comprises 2500 or fewer fibers, and
wherein the filter probe is configured to be at least partially submerged in a liquid medium that is being filtered by the filter probe during operation.

2. The filter probe of claim 1 , wherein the hollow fibers of the fiber bundle have an average outer diameter in a range between about 0.5 mm and about 5 mm.

3. The filter probe of claim 1 , wherein the hollow fibers of the fiber bundle have an average inner diameter in a range between about 0.1 mm and about 5 mm.

4. The filter probe of claim 1 , wherein the hollow fibers of the fiber bundle are arranged in an array.

5. The filter probe of claim 4 , wherein the array is a hexagonal, linear, annular, or square array.

6. The filter probe of claim 1 , wherein the fiber bundle comprises at least about 10 hollow fibers.

7. The filter probe of claim 1 , wherein the filter bundle comprises a structured segment over which the center-to-center distance between any two hollow fibers within the fiber bundle is greater than or equal to the average outer diameter of the hollow fibers of the fiber bundle.

8. The filter probe of claim 1 , wherein the filter bundle comprises a structured segment over which the center-to-center distance between any two hollow fibers within the fiber bundle is greater than or equal to 1.1 times a minimum diameter of the two hollow fibers.

9. The filter probe of claim 8 , wherein the structured segment has a length of at least about 50 mm.

10. The filter probe of claim 8 , wherein the hollow fibers within the structured segment have a surface area of at least about 20 cm 2 .

11. The filter probe of claim 1 , wherein at least one hollow fiber within the fiber bundle comprises a plurality of pores having an average pore size as measured by porometry in a range between about 0.025 μm and about 2.0 μm.

12. The filter probe of claim 1 , wherein one or more hollow fibers within the fiber bundle comprise a polymer, a ceramic, and/or a metal.

13. The filter probe of claim 1 , wherein the filter probe is configured to withstand a pressure differential between about −5 bar and about 5 bar.

14. The filter probe of claim 1 , wherein the plurality of hollow fibers has a variable alignment along a structured segment of the filter probe.

15. The filter probe of claim 1 , wherein the filter probe comprises a central shaft and one or more spacing elements associated with the central shaft.

16. The filter probe of claim 15 , wherein the one or more spacing elements encircle the central shaft.

17. The filter probe of claim 15 , wherein the one or more spacing elements each include a central clearance hole through which the shaft is inserted.

18. The filter probe of claim 1 , wherein the center-to-center distance between any two hollow fibers within the fiber bundle at one or more points along a length of the fiber bundle is greater than or equal to 2.5 times a minimum diameter of the two hollow fibers.

19. A filter probe, comprising:
a fiber bundle comprising a plurality of hollow fibers,
wherein a center-to-center distance between any two hollow fibers within the fiber bundle at one or more points along a length of the fiber bundle is greater than or equal to an average outer diameter of the hollow fibers of the fiber bundle,
wherein the filter probe has a diameter of about 25 mm or less and comprises 2500 or fewer fibers, and
wherein the filter probe is configured to be at least partially submerged in a liquid medium that is being filtered by the filter probe during operation.

20. A filter probe, comprising:
a fiber bundle comprising a plurality of hollow fibers; and
a secondary filter,
wherein at least one hollow fiber of the fiber bundle is fluidically connected to the secondary filter,
wherein the filter probe has a diameter of about 25 mm or less and comprises 2500 or fewer fibers, and
wherein the filter probe is configured to be at least partially submerged in a liquid medium that is being filtered by the filter probe during operation.

Assignees

• Massachusetts Inst Technology

Inventors

• Love J Christopher
• Mascarenhas Craig A
• Lu Amos Enshen
• Braatz Richard Dean

Classifications

• B01D63/031

  Two or more types of hollow fibres within one bundle or within one potting or tube-sheet · CPC title

• B01D2325/0283

  Pore size · CPC title

• B01D63/024

  with a single potted end · CPC title

• C12M47/10

  Separation or concentration of fermentation products (bioreactors combined with means for distillation or extraction of liquid fuel C12M43/02) · CPC title

• C12M29/10

  Perfusion · CPC title