SUPERHEATED STEAM DRYING (SSD)
• Proposed over 100 years ago; received serious
attention only during the past 20 years
• Uses steam in place of hot air or
combustion/flue gases in a direct dryer
• More complex than hot-air drying system
• Lower net energy consumption (if exhausted
steam can be used elsewhere in the process)
• Better product quality (in most cases)