Chapter 15 Finishing Flashcards
(37 cards)
Define Finishing
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Define Clarification
All the processes, physical and chemical that are used to make a wine clear. It includes sedimentation, filtration, centrifugation and finning.
Define Sedimentation
When the suspended particles fall to the bottom of the vessel overtime. The wine can be separated from the sediments.
Define Centrifugation
Spinning the wine at high speed to clarify it. Only suitable for high volumes productions. The process is rapid and allows for early bottling.
Define Fining
It is a procedure in which a fining agent is added to speed up the process of the precipitation of suspended material in the wine. It can be a protein or mineral origin.
Define Colloids
Microscopic particles too small to be removed by filtering
Define Fining agents
A product of protein or or mineral origin used to help in the fining process.
They remove colloids, harsh tannins in red wines or browning in white wines.
Define Bentonite
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Define Egg white
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Define Gelatine
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Define Casein
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Define Isinglass
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Define Vegetable protein fining products
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Define PVPP
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Define Filtration
- Nikki used to eliminate solids from a wine, orange juice. It is the most common way of clarifying wine.
Define Depth filtration
A method of filtration that traps solids in the material that forms the filter.
Advantages: it can be used for wines with many particles in it. It does not block easily.
Disadvantages: if too much pressure is applied or if the filter is used for too long some particles will make it through. It is not an absolute filter.
Define Diatomaceous earth
The most common form of depth filtration in the form of inert silica.
Define Sheet filters
The type of the filtration where the wine is passed through Rashid of the filter and material. The sheets can be very fine graded and remove small particles.
Initial investment can be high, but cost of filters is low. Trained personnel is needed to operate the machine properly.
Define Surface filtration
Filters that stop particles that are bigger than the poor size of the filter. They are absolute filters.
Define Membrane filters
Also called sterile filtering. They filter using cartridges that have pours that are one micron in size. Wine must be pre-filtered and this is often used right before bottling.
Initial investment is small, but the cartridges are expensive and not reusable
Define Cross-flow filters
A type of absolute filter. They can be used to filter wine with a high low load of particles or release very quickly. There are no replacement sheets, cartridges, or to buy or dispose of. However, the machines are expensive and only suitable for large operations.
Define Stabilisation
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Define Protein stability
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Define Tartrate stability
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