Sterile filtration

Question 1

What are 2 disadvantages of tunnel pasteurization?

Answer 1

High capital cost
Large footprint
Maintenance costs

Question 2

What are some advantages of sterile filtration?

Answer 2

Improved clarity
No heating
Easy to use/disposable cartridges
Effective spoilage organism removal

Question 3

What is the purpose of depth filtration in sterile filtration?

Answer 3

Take advantage of mechanical straining through depth and electro kinetic adsorption

Question 4

What are some methods of integrity testing membrane filters?

Answer 4

Bubble point
Diffusion flow
Pressure hold

Question 5

What absolute pore size is required for sterile beer filtration?

Answer 5

0.45

Question 6

What are some sources of micro contamination around a bottle filler?

Answer 6

Filler heads
Hopper
Closures and conveyors
People
Atmosphere
Filler bowl
Plumbing
Containers

Question 7

What substances will cause membrane filters to plug?

Answer 7

Beta glucans

Question 8

What are some measures that can be used to extend sterile filter life?

Answer 8

Cleaning
Reduce face velocity
Increase surface area