Ozone is a non-thermal food processing method used instead of heat treatment since it is economical and environmentally beneficial. Green technology is another name for it because it has the fewest adverse environmental effects. It is frequently used to increase the seed germination rate and degrade mycotoxin in grains by microbial cleansing. An outline of ozone's effectiveness for microbial cleaning, mycotoxin degradation, insect control, starch modification, functional quality alterations, and germination ability is addressed in this chapter.