Lesson 9 - Clarification – Filtration SAQ
This lesson allows you to test yourself on the material covered in the Clarification – Filtration lesson, and determine the level to which you have met the learning outcomes.
Self-Assessment Questions
1. *Answer ALL parts of this question:
List three essential features of a filtration system and their function.
2. **Answer BOTH parts of this question:
a) Filtration is the separation of solids via which three mechanisms?
b) Explain the function of one of these filtration mechanisms and what filter technologies deliver this?
3. **Answer BOTH parts of this question:
a) When filtering your beer, you periodically see slugs of maturation tank bottoms in the inlet main to the filtration area. What measures can you take to ensure the tank bottoms do not blind the filter?
b) In terms of the ‘absolute rating’ of a sterile filter, what is the pore size, and why is this important? How can the brewing process upstream be managed to reduce loading onto this filter?
4. **Answer ALL parts of this question:
You have been asked to scope a project to install a crossflow filter and the different options available to the brewer.
a) What types of beer membrane filters would you consider?
b) How would you expect the changes to impact on filtration performance and labour demands?
c) What benefits would you expect to see, both operational and financial?
5. **Which of the following filtration variables effect filter run length?
a) Beer flow rate
b) Oxygen content
c) Bed depth
d) Beer temperature