The Optimization of Production Conditions of High-gravity Alcohol Fermentation

The effects of different conditions such as the addition of nitrogen, saccharifying technology, fermentation conditions, etc. on high-gravity alcohol fermentation were studied with corn powder used as material and AY-15 employed as fermentation strain. The results showed that the fermentation ability of yeast was promoted by adding suitable nitrogen, and fermentation period was shortened 12 h. The suitable saccharifying technology were glucoamylase concentration 150 u/g,treatment time 60 min. The suitable fermentation conditions were initial pH value 5.0,fermentation temperature 33 ℃.