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Master Brewers Podcast

Episode 110: The Microbiological Impact of Dry Hopping Beers with Pelletized and Whole Cone Cascade Hops

Oct 9, 2023
This podcast explores the microbiological impact of dry hopping beers, discussing the presence of beer-spoiling bacteria in hops, the antimicrobial properties of hops, and the effectiveness of dry hopping. It also highlights the sponsors and their products, discusses different dry hopping rates and their results, and explores the antimicrobial effects of hop extracts in finishing.
26:42

Podcast summary created with Snipd AI

Quick takeaways

  • Dry hopping with hops that possess antimicrobial properties can help inhibit bacterial growth in beer.
  • Pelletized hops tend to have a stronger antimicrobial effect than whole cone hops due to their higher concentration of antimicrobial compounds and increased surface area.

Deep dives

The Impact of Dry Hopping on Beer Spoilage

Dry hopping, a popular technique in brewing, raises concerns about potential beer contamination. The presence of native microflora in hop fields and the lack of a kill step during hop processing contribute to this risk. However, dry hopping with hops that possess antimicrobial properties, such as high alpha acids, can help inhibit bacterial growth. Pelletized hops tend to have a stronger antimicrobial effect than whole cone hops due to their higher concentration of antimicrobial compounds and increased surface area. The pH of the beer also plays a role in suppressing microbial growth. Future experiments will explore the antimicrobial impact of hop extracts, variations among hop varietals, and the correlation between alpha acid concentrations and antimicrobial effectiveness.

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