Abstract
Belgian ale quality in craft breweries depends on consistent fermentation control because yeast activity strongly affects ester formation, phenolic expression, attenuation, and flavour balance. This study examines adaptive fermentation monitoring for improving Belgian ale quality consistency in small-scale production. Controlled craft brewery fermentations were monitored using density, pH, temperature, dissolved oxygen, carbon dioxide evolution, yeast viability, and sensory quality indicators. The results show that adaptive monitoring improved early detection of sluggish fermentation, excessive temperature rise, and abnormal attenuation patterns. Real-time tracking of density and pH helped identify fermentation endpoint more accurately than fixed tank-holding schedules. Consistent monitoring also supported better control of fruity ester development and reduced batch-to-batch flavour variation. The study demonstrates that adaptive fermentation monitoring can help craft breweries maintain Belgian ale quality without relying only on manual sampling and sensory judgement. Overall, process-linked monitoring improves consistency, fermentation reliability, and final beer character.