Receiving & Cleaning
These impurities hinder drying operations and make them longer and more costly. After drying, especially by traditional methods such as open-air drying, the grain may still be contaminated by impurities.
These impurities lower the quality of the product and are also a focal point for potential infestation during storage.
"Cleaning" means the phase or phases of the post-harvest system during which the impurities mixed with the grain mass are eliminated.
This operation, which may be accompanied by a sorting of the products according to quality, is indispensable before storage, marketing or further processing of the products.
It is also necessary as an operation preliminary to artificial drying of the products in dryers.
Indeed, it would be not only costly but also superfluous to waste time, effort and money on drying the impurities along with the grain.