Yeast cells obtained from batch fermentation can be reutilized for the production of:
Yeast cells obtained from batch fermentation can be reutilized for the production of:
Select an option to attempt
Correct Answer: Option A
Explanation
Yeast recycling in beer fermentation:In traditional brewing and modern industrial beer production:• After primary fermentation is complete, yeast settles (sedimentation) or can be collected ('cropped'):- Bottom-fermenting (lager) yeast: collects at bottom → 'bottom cropping'- Top-fermenting (ale) yeast: collects at top → 'top cropping'• Collected yeast is washed, stored cold, and used to inoculate subsequent batches.• This 'yeast repitching' can be done multiple times (typically 5–10 generations in commercial brewing; up to 20+ times in traditional breweries).Benefits:• Cost savings (no need to purchase fresh yeast every batch)• Consistency (known, pre-adapted yeast strain)• Faster fermentation start (actively metabolising yeast)Monitoring: Cell viability and vitality are checked (methylene blue staining) before repitching.Answer: Yeast from batch fermentation can be harvested and reused to inoculate subsequent fermentations (yeast repitching).