The fan and motor should be sized to deliver cfm per bushel treated. Ammonia vapor should be recirculated for about 48 hours. After that time the fan can be turned off except for short periods when it is needed to distribute heat and moisture. The treatment time varies from 1 to 3 weeks, depending on grain temperature and moisture. When sampling indicates that aflatoxin has been reduced to acceptable levels, the return hose can be disconnected and the fan operated to aerate the grain.
Aeration removes some of the ammonia odor and makes the corn more acceptable to swine and poultry.
If ammonia gas is inhaled, the victim should immediately go or be assisted to an uncontaminated area. If the exposure was very brief or to a low concentration of ammonia, further treatment usually is unnecessary. However, medical assistance should be obtained if the victim has chest pains, pains when breathing or a persisting cough. A physician should be called immediately and thoroughly informed about the accident. If oxygen is available, it can be administered by a trained individual until medical help arrives.