... . The optimum pH 2.5-6.0, and temperature is 30-55.2. DosageThe dosage of acid protease used is 10 ... , each gram raw material need 14U/g acid protease, 280g/ton acid protease (50000u/g), or 350g/tone acid protease (40000u ... volume, add acid protease continuously during fermentation. For a 30 ton/day (10,000 ton/year) alcohol plant, the adding rate acid protease ...