FIELD: grain preservation. SUBSTANCE: apparatus has vertical contact chamber with top and bottom grain discharge devices. Nozzles with dividers for spraying of propionic acid are mounted in lower part of contact chamber. Grain baffle is positioned in upper part of contact chamber. Surfaces of propionic acid divider and grain baffles are made from opposite-polarity electrets. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 1 dwg
