FIELD: food industry.
SUBSTANCE: present invention relates to food industry. The method includes application of heat and pressure with powder or grain supplied into the pipeline with a flux of heated gas and maintained under heat and pressure application conditions as well as powder or grain transportation in the source whereof such powder or grain immediately contacts heated condensing gas in the pipeline during 0.008-2 seconds. Then one performs instantaneous sterilisation by way of pressure drop with the heated condensing gas and the powder or grain are passed through the pressure reduction plant positioned downstream the heated gas pipeline for reduction of pressure occurring within 0.00001 - 0.1 sec.
EFFECT: invention ensures annihilation of noxious insects and their eggs.
6 cl, 2 dwg, 4 tbl, 23 ex
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