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Overview
Breweries have relied on cold maturation and cold processing to support beer clarity and stability. These temperature steps were introduced to manage equipment limits and microbiological risk, but they drive energy use and add complexity to production.
Recent shows that PVPP stabilization performs well at higher processing temperatures. The results challenge long held assumptions about the need for strict cold conditions during stabilization.
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Challenge
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Solution
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Results
Breweries working to reduce energy costs and environmental impact must still protect clarity and shelf life. Cold block operations create several hurdles:
- High refrigeration demand
- Longer tank occupancy
- Dependence on low temperatures for haze formation
- Extra cooling needs for pasteurization and filling
- Concerns about clarity and colloidal stability if temperatures increase
These factors make temperature changes in the cold block difficult to adopt.
Continuous Beer Stabilization with PVPP
The Pall Continuous Beer Stabilization System (CBS) uses regenerable PVPP in fixed bed columns to create a stable and consistent process. This design supports:
- Continuous operation
- Lower PVPP use
- A smaller system footprint
- More efficient processing
- Reliable performance at warmer temperatures
Divergan® RS and Divergan® Pall are produced using green electricity, which helps support brewery sustainability goals.
Study Approach
Two controlled evaluations were conducted to understand PVPP performance at different temperatures.
Trial A: 0°C, 10°C and 20°C
Beer samples were treated with PVPP at three target temperatures using a 30 minute contact time before filtration. Total polyphenols were measured after treatment.
Key observations:
- Polyphenol levels decreased as temperature increased
- No loss in adsorption performance at higher temperatures
- Some PVPP grades showed improved behavior at warmer conditions
Trial B: 1°C to 15°C Catechin Testing
A catechin solution was used to measure adsorption performance across several Divergan grades within a controlled temperature range.
Key observations:
- Adsorption rates improved slightly with higher temperatures
- Divergan RS and Divergan Pall showed the strongest response
- No reduction in adsorption at elevated temperatures
PVPP performance remains strong across temperatures
PVPP delivered equal or improved adsorption at 10–20°C compared with near freezing operation.
Operational benefits for breweries
Reducing cold dependence may help breweries:
- Lower refrigeration energy use
- Shorten tank times
- Improve flow through production
- Cut emissions tied to cold processing
- Maintain clarity and haze stability
A robust stabilization option
PVPP remains effective across a wider temperature range than traditionally assumed, which offers flexibility for breweries reconsidering cold block constraints.
Conclusion
Modern brewing systems and PVPP stabilization provide a path to reduce dependence on cold temperature. The trials show that PVPP continues to perform well at warmer temperatures. For breweries exploring energy savings, PVPP stabilization does not appear to limit the move toward higher processing temperatures. The Pall CBS system supports this shift by enabling steady and efficient beer stabilization.
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