Lesson 2 - Warm and Cold Maturation
This lesson explores the processes of warm maturation and cold maturation. Warm maturation can also be described as flavour maturation This process removes negative or unwanted flavours from the beer post-fermentation. Cold maturation occurs at lower temperatures (below 0°C), which in turn causes haze-forming components to form. These components can then be removed by precipitation or clarification via centrifuge or filtration. This lesson highlights the importance of these processes, how they affect the quality of the final product, and how we manage these maturation steps.
Lesson Information
Pre-requisite Knowledge:
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Introduction to Beer Maturation and Finishing (Beer Maturation and Finishing/Lesson 1)
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Fermentation Principles (Fermentation/Lesson 2)
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Fermentation and Beer Flavour (Fermentation/Lesson 4)
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Yeast Propagation (Yeast/Lesson 6)
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Yeast Management (Yeast/Lesson 8)
Learning Outcomes:
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Describe the range of maturation vessels available and explain how both a vessel’s design and its requirements affect beer quality.
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Identify the sizing requirements of maturation vessels based on fermentation vessel volumes and maturation duration.
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Discuss the principles of warm maturation; understand the process of flavour development and describe the impact of process control.
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Compare batch and continuous maturation; describe their impact on the maturation process.
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Discuss the principles of cold maturation and show an understanding of its impact on colloidal stability.
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Explain the use of wood during maturation; describe its impact on final beer flavour.