PROBLEM TO BE SOLVED: To prevent deterioration in a food by preventing the progression of the oxidization and corrosion not only on the surface of a food but also to the inside thereof upon freezing and thawing of the food or the like.SOLUTION: The food treatment method of performing the freezing and thawing of a food comprises: a freezing step of freezing a food in an atmosphere where negative ions are supersonic-vibrated and a thawing step of thawing the frozen food while applying negative voltage in an atmosphere including negative ions. Alternatively, the method comprises: a preservation step of preserving the thawed food while applying negative pressure in an atmosphere including negative ions and a transportation step of transporting the frozen food in an atmosphere including negative ions.【課題】食材の冷凍時や解凍時などにおいて、食材の表面だけでなく内部までも酸化や腐食の進行を防止して食材の劣化を防止。【解決手段】食材の冷凍及び解凍を行う食材処理方法は、マイナスイオンを超音波振動させた雰囲気で食材を冷凍する冷凍工程と、マイナスイオンを含む雰囲気で負電圧を印加しながら冷凍された食材を解凍する解凍工程とを有する。また、前記解凍された食材をマイナスイオンを含む雰囲気で負電圧を印加しながら保存する保存工程、さらに、前記冷凍された食材をマイナスイオンを含む雰囲気で運搬する運搬工程を有する。【選択図】図1
