VENTING SYSTEM FOR A MIXING APPARATUS

1 . A method of preparing a bioprocess solution, comprising:

producing a mixture of liquid and air by hydrating a powder;

separating the liquid from the air by:

providing the mixture to a first filter capsule;

allowing the liquid to flow to an outlet across a hydrophilic membrane of the first filter capsule while directing the air upwards along the first filter capsule toward a second filter capsule arranged above the first filter capsule; and

venting the air from the second filter capsule by allowing the air to flow through a hydrophobic membrane of the second filter capsule.

2 . The method of claim 1 , wherein separating the liquid from the air further comprises breaking up bubbles or foam of the mixture at a position between the first filter capsule and the second filter capsule.

3 . The method of claim 2 , further comprising:

flowing, by the air upon breaking up of the bubbles or the foam, to the second filter capsule; and

flowing, by the liquid upon breaking of the bubbles or the form, back to the first filter capsule.

4 . The method of claim 2 , wherein breaking up the bubbles or the foam is performed by a structure of a defoaming substance at the position in combination with kinetic forces associated with flowing of the mixture.

5 . The method of claim 4 , wherein the defoaming substance is steel wool or steel shavings.

6 . The method of claim 1 , wherein directing the air upwards along the first filter capsule toward the second filter capsule arranged above the first filter capsule comprises causing the air to flow through a defoaming device to the second filter capsule.

7 . The method of claim 1 , wherein allowing the air to flow through the hydrophobic membrane of the second filter capsule comprises allowing the air to flow from a hollow center of the second filter capsule across the hydrophobic membrane to an open volume around the hydrophobic membrane inside the second filter capsule.

8 . The method of claim 1 , wherein allowing the liquid to flow to the outlet across the hydrophilic membrane of the first filter capsule comprises allowing the liquid to flow across the hydrophilic membrane to a hollow center of the first filter capsule and from the hollow center of the first filter capsule to the outlet.

9 . The method of claim 1 , wherein producing the mixture of the liquid and the air by hydrating the powder comprises mixing water and powdered or granulated cell culture media in a mixing chamber connected via tubing to the first filter capsule.

10 . The method of claim 1 , wherein producing the mixture of the liquid and the air by hydrating the powder comprises mixing water and a dry buffer powder in a mixing chamber connected via tubing to the first filter capsule.

11 . A method of preparing a bioprocess solution, comprising:

flowing, by a mixture of the bioprocess solution and air, into a first filter capsule;

flowing, by the bioprocess solution, across a hydrophilic membrane of the first filter capsule while flowing, by the air, upwards toward a second filter capsule arranged above the first filter capsule; and

venting, by the air, from the second filter capsule by flowing across a hydrophobic membrane of the second filter capsule.

12 . The method of claim 11 , further comprising defoaming the mixture by contacting, by foam or bubbles of the mixture, a structure at a position between the first filter capsule and the second filter capsule.

13 . The method of claim 12 , wherein the structure comprises steel wool or steel shavings.

14 . The method of claim 12 , further comprising flowing, by the bioprocess solution from the foam or the bubbles and in response to the defoaming, back to the first filter capsule and across the hydrophilic membrane.

15 . The method of claim 11 , wherein venting, by the air, from the second filter capsule by flowing across the hydrophobic membrane of the second filter capsule comprises flowing, by the air from a hollow center of the second filter capsule across the hydrophobic membrane to an open volume around the hydrophobic membrane inside the second filter capsule.

16 . The method of claim 11 , wherein flowing, by the bioprocess solution, across the hydrophilic membrane of the first filter capsule comprises flowing, by the bioprocess solution, from across the hydrophilic membrane into a hollow center of the first filter capsule and from the hollow center of the first filter capsule to an outlet.

17 . The method of claim 11 , further comprising mixing, by water and powdered or granulated cell culture media, to form the mixture comprising the bioprocess solution and the air.

18 . A method of preparing a bioprocess solution, comprising:

connecting a first filter capsule to a mixing chamber to receive a mixture of liquid and air from the mixing chamber;

providing, in the first filter capsule, a hydrophilic membrane configured to allow the liquid to flow across the hydrophilic membrane to an outlet while directing air upwards toward a second filter capsule arranged above the first filter capsule; and

providing, in the second filter capsule, a hydrophobic membrane separating regions of the second filter capsule such that the air passes across the hydrophobic membrane inside the second filter capsule before venting from the second filter capsule.

19 . The method of claim 18 , further comprising providing a defoaming device above the first filter capsule and below the second filter capsule and configured to break up bubbles or foam of the mixture.

20 . The method of claim 18 , comprising producing the mixture by mixing water and powdered or granulated cell culture media in the mixing chamber.