Yeast Harvesting & Repitching Guide

Category : Technical
Date : June 17, 2024
Author : White Labs
Yeast collection and reuse is long-established practice in brewing. With proper yeast handling and repitching practices, brewers can effectively reduce yeast expenses by maintaining yeast health and reusing a single strain for multiple generations and many batches of beer.
 
Brewing schedules are crucial to help maximize efficiency and ensure the yeast is not left in storage too long. Harvesting yeast is relatively easy to implement. All that is needed is a sterile storage vessel, cold storage space, and a solid SOP with good practice.
 
  • Collecting and harvesting yeast at the optimal point of fermentation will avoid prolonged exposure to yeast stressors in the fermentor, ensuring healthy yeast harvests
  • Proper cold storage with minimal exposure to oxygen can extend the viability and shelf life of yeast from batch to batch.
  • Differences in pitching rate can affect flavor production, fermentation speed, yeast health, and flocculation, leading to yeast harvesting problems. Pitching the right amount of yeast is key to reliable fermentations and great-tasting beer every time.
These methods can reduce yeast price points from $50/bbl (single use) to $2/bbl (multiple generations) with minimal investment, labor, or supplies.
Simply tracking the culture lineage and fermentation kinetics will provide outstanding results in beer quality and your bottom line.
 

A man harvesting yeast.

Download Yeast Handling & Repitching Guide