Rhizopus oryzae
Usage: Food fermentation. Koji fermentation.
Mainly secretes starch glucoamylase, which converts starch into glucose. The activity of starch glucoamylase is affected by the environment
Precautions for use:
The optimum fermentation time is 40 hours.
The optimum cultivation temperature is 30-32℃.
The best ph6-6.5, acidic environment is better than alkaline environment.
Rhizopus oryzae is often used in fermentation engineering, mainly to use the starch glucoamylase secreted by it to convert starch into glucose.
The activity of starch glucoamylase is affected by the environment, as follows:
The best fermentation time is about 40 hours. After about 40 hours, the enzyme activity begins to decrease, and less than half after 60 hours.
The optimum temperature is about 30℃, and the enzyme activity drops sharply when it is higher than 30℃.
The best pH is about 6, acidic environment is better than alkaline environment.
The optimum alcohol concentration is about 6%vol, and the activity drops sharply after being higher than 12%vol.
Metal Cu, Ca, Mg ions can promote enzyme activity, while Mn and Zn are not conducive to enzyme activity. Fe ferrous ions have the greatest inhibitory effect on enzymes.
Storage method: sealed and dried below 20℃.
