Spent Yeast Slurry (Fermenter Bottoms; Yeast Crop + Brink) Storage

Storing Spent Yeast Slurry? Start Here

If you're dealing with spent yeast slurry from brewing or distilling, you're handling a key byproduct that needs careful storage. This slurry, which includes yeast cells, residual beer, and some ethanol, is collected after fermentation. Keeping it viable and uncontaminated is crucial, especially if you're planning to reuse the yeast. Generally, the slurry is slightly acidic and should be stored at cool temperatures to maintain yeast viability and prevent microbial contamination.

Can you store it in a poly tank?

Yes, you can store spent yeast slurry in a high-density polyethylene (HDPE) tank, as long as the temperature stays below 140°F. HDPE tanks are suitable for both yeast harvest and brink storage. For optimal results, keep the storage temperature between 35-40°F, ideally in a refrigerated environment.

Key Issue: Temperature Control

Maintaining the right temperature is critical when storing spent yeast slurry. To ensure yeast viability and prevent contamination, keep the slurry cool, ideally between 35-40°F. This helps extend the shelf life and keeps the yeast ready for reuse.

The safety that actually matters

• Keep storage temperatures between 35-40°F for best results.
• Use FDA-grade HDPE tanks for safe, compliant storage.
• Regularly clean and sanitize tanks to prevent contamination.

Common questions

What type of tank is best for storing spent yeast?

FDA-grade HDPE tanks are ideal for storing spent yeast slurry, especially at temperatures below 140°F.

How long can I store spent yeast slurry?

For best results, store the slurry for 3-7 days at 35-40°F to maintain yeast viability.

What precautions should I take to prevent contamination?

Ensure tanks are regularly cleaned and sanitized, and maintain proper temperature control to prevent microbial growth.