Low Extract – Troubleshooting Flashcards
(10 cards)
What is the first step to take if extract efficiency recovery to the kettle is below standard?
Use a troubleshooting chart to understand the issue
This chart helps identify problems related to mash conversion efficiency and wort separation.
What is the focus when troubleshooting low extract recovery?
The efficiency of mash conversion
If mash conversion is not 100%, then 100% recovery at wort separation cannot be expected.
What is the typical specific gravity (SG) of the mash wort when mashed at 3 L/kg?
1.080 or 19.3 ˚P
This SG is determined during the mash process and should be checked directly from the mash, not the separated strong worts.
Why is it important to sample the mash for gravity checks?
Strong worts will be diluted by the underlet water
This dilution can lead to inaccurate readings if the strong worts are sampled instead.
What could cause mash gravity variation? List at least three factors.
- Mash water flow meter calibration
- Malt laboratory extract changes
- Weigher calibration issues
Other factors include plansifter analysis and mash vessel temperature probe calibration.
What does a low kettle gravity suggest if mash gravity is as expected?
Inefficiency at wort separation
This inefficiency is indicated by higher than normal last runnings gravity and soluble extract in the spent grain.
What indicates a sparging issue during wort separation?
High last runnings gravity
A normal last runnings gravity should be around SG 1.004-1.006.
Fill in the blank: If the mash gravity is as expected but kettle gravity is low, it suggests an inefficiency at _______.
wort separation
What should be checked if the mash vessel ionic conditions have changed?
Water composition affecting mash pH
Changes in water composition can significantly impact the efficiency of the mash process.
What is the significance of having a higher than normal soluble extract in the spent grain?
It indicates inefficiency at wort separation
This can lead to lower extract recovery in the kettle.
