grain Processing in alcohol production plays a special role in the technological process. To obtain high quality indicators of ethanol, the quality of the grain itself and the degree of its purification from impurities (litter, stones, cobs, metal impurities, etc.), the degree of grinding of raw materials are important. Basically, all technological operations for cleaning and part-time processing of grain are performed on special equipment (grain separators, triers, grinding devices of various types, flour and grain dust catchers, etc.). the process itself occurs immediately before the preparation of the batch, and can be carried out at the stage of grain acceptance to the raw material warehouse.