Variable diameter bioreactors

1. A variable diameter bioreactor vessel configured for mammalian cell production, cellular biologic material, or live cells, the variable diameter bioreactor vessel comprising:

a first vessel section having a first diameter configured to hold a liquid medium and biologic material;

a second vessel section, wherein the second vessel section is situated such that the liquid medium and biologic material can be increased from a first volume to a second volume within the vessel, wherein the vessel has a base that is narrow than a top of the vessel; and

at least one agitator, wherein the variable diameter bioreactor vessel has a bioreactor height and a minimum aspect ratio of greater than 0.3:1 at every bioreactor height.

2. The variable diameter bioreactor vessel of claim 1 , wherein the first vessel section has an aspect ratio of greater than 0.3:1 to about 2:1.

3. The variable diameter bioreactor vessel of claim 1 , wherein the second vessel section has an aspect ratio of greater than 0.3:1 to about 3:1.

4. The variable diameter bioreactor vessel of claim 1 , wherein the first vessel section is configured such that an inoculum could be added directly to said bioreactor.

5. The variable diameter bioreactor vessel of claim 1 , wherein the second vessel section is configured to be a growth stage bioreactor.

6. The variable diameter bioreactor vessel of claim 1 , wherein at least one of the vessel sections of the variable diameter bioreactor is configured to be a production stage bioreactor.

7. A method of producing a fermentation product using a reduced amount of reactors in a seed stage train and production reactor, comprising the steps of:

inoculating a variable diameter bioreactor according to claim 1 at a first volume with a growth medium and inoculum;

adding additional growth medium to the variable diameter bioreactor to scale up the variable diameter bioreactor volume from the first volume to a second volume following completion of an inoculation stage in the first volume;

adding additional growth medium to the variable diameter bioreactor to scale up the variable diameter bioreactor volume from the second volume to a third volume following completion of a seed stage in the second volume.

8. The method of claim 7 , further comprising: adding additional growth medium to the variable diameter bioreactor to scale up the variable diameter bioreactor volume to a third volume following completion of a growth stage in the second volume.

9. The method of claim 7 , wherein the inoculum is obtained from an initial seed reactor such that the variable diameter bioreactor is both the final reactor in the seed stage train and is the production reactor.

10. The method of claim 7 , wherein the inoculum is a mammalian cell culture.

11. A bioproduction facility, comprising:

an initial inoculum growth reactor,

a variable diameter bioreactor according to claim 1 in fluid communication with the inoculum growth reactor such that the variable diameter bioreactor is configured to be a seed stage reactor train.

12. The bioproduction facility of claim 11 , wherein the variable diameter bioreactor is further configured to be a production reactor.

13. The bioproduction facility of claim 11 , further comprising a plurality of variable diameter bioreactors.

14. The bioproduction facility of claim 11 , wherein the variable diameter bioreactor is in fluid communication with downstream processing components.

15. The bioproduction facility of claim 11 , wherein the variable diameter bioreactor is controlled by a controller system.

16. The variable diameter bioreactor vessel of claim 1 , further comprising a third vessel section.

17. The variable diameter bioreactor vessel according to claim 1 , further comprising a third vessel section,

wherein the first vessel section has a diameter that varies along a height of the first vessel section,

wherein the second vessel section has a diameter that varies along a height of the second vessel section, and

wherein the third vessel section has a diameter that is uniform throughout the third vessel section.

18. The variable diameter bioreactor vessel according to claim 1 , further comprising a third vessel section,

wherein the first vessel section has a diameter that that is uniform throughout the first vessel section,

wherein the second vessel section has a diameter that that is uniform throughout the second vessel section

wherein the third vessel section has a diameter that that is uniform throughout the third vessel section; and

wherein the diameter of the third vessel section is greater than the diameter of the second vessel section, and the diameter of the second vessel section is greater than the diameter of the first vessel section.

19. The variable diameter bioreactor vessel according to claim 1 ,

wherein the first vessel section has a conical design such that the base of the first vessel section is narrower than the top of the first vessel section; and

a second vessel section wherein the diameter of the bottom of the second vessel section is the same as that of the top of said second vessel section.