PROBLEM TO BE SOLVED: To provide a concentration method of milk capable of suppressing degradation of protein or the like and improving a shelf life of milk, and a concentration apparatus excellent in concentration ability with a simple structure.SOLUTION: A concentration apparatus 10 of milk includes a storage unit 11 of milk, a nearly-sealed outer wall unit 12 surrounding the storage unit 11 with a specified space part in-between, and a superheated steam generator 20. The storage unit 11 has an opening at an upper side. The outer wall unit 12 has a ceiling part and a partition part 13 installed under the ceiling part and above the opening of the storage unit 11. The partition part 13 has vent holes 13a through which steam generated from the storage unit 11 passes and is discharged to the outside. The superheated steam generator 20 supplies superheated steam to the space part. Milk is heated under an atmosphere of superheated steam, and further preferably under a reductive atmosphere.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】タンパク質等の変質を抑え、保存性の向上を図ることができる牛乳の濃縮方法の提供、及び、簡単な構造で濃縮性に優れた濃縮装置の提供。【解決手段】牛乳の貯留部11と、貯留部11と所定の空間部を設けて囲んだ概ね密閉状態の外壁部12を備え、貯留部11は上部側に開口部を有し、外壁部12は天井部と当該天井部の下に貯留部11の開口部の上方に配置した仕切部13を有し、仕切部13は貯留部11から発生した水蒸気を通過させるための通気孔13aを有し、通気孔13aを経由して前記水蒸気を外部に放出するものであり、前記空間部に過熱蒸気を供給するための過熱蒸気発生装置20を有する牛乳の濃縮装置10。牛乳を過熱蒸気雰囲下で、加熱し、更に還元性雰囲気であることが好ましい牛乳の濃縮装置10。【選択図】図1
