Image: Normal vs. Problematic Fermentation with Belgian Ale Yeast
Published: September 26, 2026 at 8:36:03 AM UTC
Visual comparison of normal and problematic Belgian ale yeast fermentation, including krausen, yeast or sediment, fermentation activity, aroma, flavor, and appearance.
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Image description
A wide, landscape-format comparison infographic titled “Fermentation with Belgian Ale Yeast,” with the subtitle “Same Ingredients. Different Outcomes.” The composition is divided vertically into two equal sections. The left section, headed “Normal Fermentation” in white serif text on a dark green banner, shows a large clear glass fermentation vessel on a wooden tabletop. The vessel contains transparent amber-brown liquid with a thick, creamy, pale beige foam layer at the surface. A clear airlock is fitted through a tan stopper at the top. Two circular detail images appear to the upper right of this vessel: one shows a close-up of pale, bubbly foam labeled “Close-up of Krausen,” and the other shows amber liquid with fine suspended particles labeled “Yeast in Suspension.” Text on the left describes Appearance as “Active krausen, creamy and thick.” Aroma is described as “Fruity, spicy, and complex (esters and phenolics typical of Belgian strains).” Fermentation Activity is described as “Steady bubbles in airlock, vigorous but controlled.” Flavor (after conditioning) is described as “Balanced, dry, complex, with characteristic Belgian notes.” Overall is described as “Healthy yeast, clean fermentation, desired character.” Small brewing-related ingredients are visible near the lower center background, including green hop-like cones and a container of tan grain-like material. The right section, headed “Problematic Fermentation” in white serif text on a dark reddish-brown banner, shows a similar clear glass fermentation vessel with a clear airlock and tan stopper. Its liquid is darker brown and more opaque, with a thinner, irregular beige-to-brown foam layer and visible dark speckling near the surface. Two circular detail images appear at the upper right: the top shows uneven beige and brown surface foam and is labeled “Close-up of Problematic Krausen,” while the lower circle shows cloudy amber-brown liquid with pale particles or sediment and is labeled “Sediment or Off-Look.” Text on the right describes Appearance as “Thin, uneven krausen or no krausen. May show discoloration or unusual layers.” Aroma is described as “Off-putting smells (sour, solvent-like, rotten, or wet cardboard).” Fermentation Activity is described as “Little to no airlock activity, or erratic bubbling.” Flavor (after conditioning) is described as “Harsh, sour, solvent-like, or otherwise unpleasant.” Overall is described as “Stressed yeast, possible contamination, or unfavorable conditions (e.g., temperature, oxygen, nutrients).” Both vessels stand on the same warm brown wooden surface against a softly blurred beige-to-brown background. The infographic uses warm amber, cream, tan, green, and reddish-brown colors, with white section headings and predominantly dark body text. A thin vertical dividing line separates the two halves. The image visually contrasts a lighter, clearer fermentation with abundant creamy foam on the left against a darker fermentation with irregular foam and sediment-like material on the right. These visual differences are presented by the graphic as normal versus problematic fermentation; the actual microbiological condition of the depicted liquids cannot be independently determined from appearance alone.
The image is related to: Fermenting Beer with Wyeast 3655-PC Belgian Schelde Ale Yeast