JP6654238B2 - 反応性ガス発生システム及び反応性ガスを使用する処理方法 - Google Patents
反応性ガス発生システム及び反応性ガスを使用する処理方法 Download PDFInfo
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- JP6654238B2 JP6654238B2 JP2018520174A JP2018520174A JP6654238B2 JP 6654238 B2 JP6654238 B2 JP 6654238B2 JP 2018520174 A JP2018520174 A JP 2018520174A JP 2018520174 A JP2018520174 A JP 2018520174A JP 6654238 B2 JP6654238 B2 JP 6654238B2
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Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B9/00—Preservation of edible seeds, e.g. cereals
- A23B9/16—Preserving with chemicals
- A23B9/18—Preserving with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
- A23B9/22—Preserving with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere comprising other gases in addition to CO2, N2, O2 or H2O
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
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Description
本明細書に記載されるすべての電流は、交流であり、ボルト(V)及びキロボルト(kV)二乗平均平方根(RMS, root mean squared)として規定される。ガス組成物の百分率(%)は、体積百分率である。
[実施例]
100gのホールコーンをArtBin(登録商標)ポリプロピレン(PP)コンテナ(モデル9100AB)−大きさ37.0cm×35.5cm×5.2cm(L×W×H)に入れた。ArtBin(登録商標)をCryovac(登録商標)B2630高バリアフィルム−大きさ40.0cm×47.0cm(L×W)からなる第2のバッグ内に入れた。各バッグを充填ガスとしてMA65(65%O2、30%CO2、5%N2)を用い3分間(37L/分)洗浄し、次いで密封した。次いで、バッグをDBDシステム内の2つの4電極セット間に置いて(各電極:アルミニウム、直径15.24cm、計8電極−上部に4個、下部に4個)、バッグ内でHVCPを製造した。しかし、ArtBin(登録商標)内のホールコーンと接触していない。処理時間は、ホールコーン試料に対し280〜290ワット消費電力で5分間及び15分間であった。電極間の高さ(ギャップ)は5.2cmであった。95kV、電流1.0〜1.5mAでHVCPを形成した。バリア能力のさらなる表面積拡張のため、誘電体バリアを使用してバッグ内((1)まな板(IKEA(登録商標)ブランド、37cm×29cm×2cm)、(2)電極セット上部に位置するプレキシガラスバリア、及び(3)114L及び/又は151Lトートからのトートふた(Bella(商標)ブランド)(各バッグの上に2つ、下に1つ))のプラズマ場特性を制御した。これらの誘電体バリアにより、HVCPからの最適反応性ガスの発生が可能になった。
ホールコーンの代わりに、100gの全粒小麦を用い、実施例1の実験及び測定を繰り返した。以下の表にこの実験の結果をまとめて示す。表中の「温度」は、電極の温度を表す。連続処理によるさらなる低減により、所望の大きな減少を実現することができる。
Trilogy Analytical Laboratory社、(ワシントン郡、ミズーリ州)(Trilogy(登録商標)基準物質、製品#:TR-MT500、バッチ#:MTC-9999E)から供給され、既知の濃度のマイコトキシンを有する自然に汚染された多重毒素トウモロコシ製品50グラムをArtBin(登録商標)ポリプロピレン(PP)コンテナ(モデル9100AB)−大きさ37.0cm×35.5cm×5.2cm(L×W×H)に入れた。ArtBin(登録商標)を、Cryovac(登録商標)B2630高バリアフィルム−大きさ40.0cm×47.0cm(L×W)からなる第2のバッグ内に入れた。各バッグを、充填ガスとして空気(22%O2、78%N2)かMA65(65%O2、30%CO2、5%N2)のどちらかを用い3分間(37L/分)洗浄し、次いで密封した。一部の実験で使用するガスの加湿は、泡を使用して実施した(湿度約60%を生じる)。次いで、バッグをDBDシステム内の2つの4電極セット間に置いて(各電極:アルミニウム、直径15.24cm、計8電極−上部に4個、下部に4個)、バッグ内でHVCPを製造した。しかし、ArtBin(登録商標)内の製品と接触していない。すべての試料について、100kV、電流0.6〜1.8mAでHVCPを形成した。バリア能力のさらなる表面積拡張のため、誘電体バリアを使用して、バッグ内((1)まな板(IKEA(登録商標)ブランド、37cm×29cm×2cm)、(2)電極セット上部に位置するプレキシガラスバリア、及び(3)114L及び/又は151Lのトートからのトートふた(Bella(商標)ブランド)(各バッグの上に2つ、下に1つ))のプラズマ場特性を制御した。すべての製品試料を30分間処理し、次いで処理後の24時間、室温(22℃)の条件下で貯蔵した。24時間の貯蔵後に、すべての試験試料及び対照群を完全マイコトキシンパネル(complete mycotoxin panel)(#6)のためにTrilogy Analytical Laboratory社、(ワシントン郡、ミズーリ州)に送付した。
内径1/8”を有する直径1/4”のポリプロピレンチューブに2つの線番20の絶縁ワイヤを互いに180度離して取り付けた。ワイヤは全長5フィートだった。各ワイヤの1フィートを、ポリ塩化ビニル収縮チューブを使用してポリプロピレンチューブに接続した。装置を2つの垂直支持体を有するスタンドに設置して、地面から離してつるした。チューブを通過するガスの流量を測定するロトメータを有する圧縮ガスタンクに、チューブを接続した。このDBDシステムの排出口にバルブ及びサンプリングバルブを設置して、オゾンに加え、発生する他の反応性及び励起種に対する代理として発生するオゾンの量を測定した。Draeger(登録商標)ショートターム検知管(Draeger Safety AG & Co. KGaA社、リューベック市、ドイツ)により、発生するオゾンの量を測定した。この実験で使用する作動ガスは圧縮空気であった。2つの異なる流速を使用して、流速が反応性及び励起種の発生速度に影響を及ぼすかを決定した。ロトメータを使用してガス流速を測定し、また、サンプリングバルブに接続した100mlシリンジを満たすのに必要な時間によっても測定した。3つの異なる測定を30分間かけて行い、平均オゾン発生速度を決定した。HVCPを発生する条件は、7ワットの電源を使用した両方の実験(30kV)で同じだった。以下の表にこの実験の結果をまとめて示す。
Claims (17)
- 果実又は種子上のマイコトキシンを低減する方法であって、
作動ガスから高電圧低温プラズマ(HVCP)を形成することにより反応性ガスを製造するステップと、
前記HVCPから少なくとも3メートル離して前記反応性ガスを輸送するステップと、
次いで、前記果実又は種子を前記反応性ガスに接触させるステップと
を含み、
前記反応性ガスが、0.2秒間以内に消失する種を除く励起及び化学的反応性種を含む、HVCPにより製造されるガスである、
前記方法。 - 製品又は表面を反応性ガスで処理する方法であって、
作動ガスから高電圧低温プラズマ(HVCP)を形成することにより反応性ガスを製造するステップと、
前記HVCPから少なくとも3メートル離して前記反応性ガスを輸送するステップと、次いで前記製品又は表面を前記反応性ガスに接触させるステップと
を含み、
前記HVCPが、前記製品又は表面に接触せず、前記製品又は表面が、前記接触によりサルモネラ低温殺菌、リステリア低温殺菌、及び/又は大腸菌低温殺菌され、かつ
前記反応性ガスが、0.2秒間以内に消失する種を除く励起及び化学的反応性種を含む、HVCPにより製造されるガスである、
前記方法。 - 反応性ガスが、コンテナに保存されている、請求項1又は2に記載の方法。
- 製品、果実若しくは種子、又は表面が、接触時にパッケージ又はコンテナ内に密封されていない又は実質的に密封されておらず、
密封又は実質的に密封するとは、そのままにしておけば、前記パッケージ又はコンテナ内のガスが少なくとも24時間前記パッケージ又はコンテナの内部に残り、前記パッケージ又はコンテナの外部に流出又は拡散しないことを意味する、
請求項1〜3のいずれかに記載の方法。 - 製品、果実若しくは種子、又は表面が、接触により医学的に滅菌され、
医学的滅菌とは、生菌バシラス・アトロフェウス(Bacillus atrophaeus)胞子が存在していた場合に、前記接触が、前記製品、果実若しくは種子、又は表面の上又は中の前記胞子の数を前記接触前に存在した量の多くて1×10−6に減らすのに十分であることを意味する、
請求項1〜4のいずれかに記載の方法。 - 製品、果実若しくは種子、又は表面が、穀物を含む、請求項1〜5のいずれかに記載の方法。
- 1秒後〜12時間後に製品、果実若しくは種子、又は表面との接触から反応性ガスを除去するステップを更に含み、及び/又は
作動ガスが、65%O 2 、30%CO 2 、及び5%N 2 の混合物を含み、及び/又は
前記製品、果実若しくは種子、又は表面が、ホールコーン又は全粒小麦であり、及び/又は
前記接触が、流動床にある前記製品、果実若しくは種子、又は表面を用いて実施される、請求項1〜6のいずれかに記載の方法。 - 反応性ガスが、オゾン以外の少なくとも1種の反応性種又は励起種を含む、請求項1〜7のいずれかに記載の方法。
- 35分後〜12時間後に製品、果実若しくは種子、又は表面との接触から反応性ガスを除去することを更に含む、請求項1〜8のいずれかに記載の方法。
- 方法の前に、製品、果実若しくは種子、又は表面が、US及び/又はEU規格によると、ヒトの食品用としてのマイコトキシンを過剰に含み、接触後に、前記製品、果実若しくは種子又は表面が、US及び/又はEU規格によると、ヒトの食品用として適切であり、及び/又は
前記接触が、コンベヤ上を移動している前記製品、果実若しくは種子、又は表面について実施され、及び/又は
前記接触が、少なくとも1立方メートルの容積を有する処理チャンバーで実施され、及び/又は
前記製品、果実若しくは種子、又は表面上に存在するマイコトキシンの量が、少なくとも50%若しくは少なくとも90%低減され、及び/又は
前記製品、果実若しくは種子、又は表面の少なくとも一部が、HVCPから少なくとも3メートル離れており、
前記製品、果実若しくは種子、又は表面が、病院の部屋の内表面である、請求項1〜9のいずれかに記載の方法。 - 製品、果実若しくは種子、又は表面が、接触によりキャニング滅菌され、
キャニング滅菌とは、生菌ボツリヌス菌(Clostridium botulinum)胞子が存在していた
場合に、前記接触が、前記製品、果実若しくは種子、又は表面の上又は中の前記胞子の数を前記接触前に存在した量の多くて1×10−12に減らすのに十分であることを意味する、
請求項1〜10のいずれかに記載の方法。 - 製品、果実若しくは種子、又は表面が、接触により、サルモネラ低温殺菌、リステリア低温殺菌、及び/又は大腸菌低温殺菌される、請求項1又は3〜11のいずれかに記載の方法。
- 方法の前に、製品、果実若しくは種子、又は表面が、US及び/又はEU規格によると、動物の飼料用としてマイコトキシンを過剰に含み、接触後に、前記製品、果実若しくは種子、又は表面が、US及び/又はEU規格によると、動物の飼料用して適切である、請求項1〜12のいずれかに記載の方法。
- 製品又は表面を反応性ガスで処理するためのシステム(200、300、400)であって、
(1)誘電体バリア放電(DBD)システム(206、306、406)と、
(2)前記DBDシステム(206、306、406)に流体接続されている処理チャンバー(216、302、400)と
を含み、
前記処理チャンバー(216、302、400)が、少なくとも1立方メートルの容積を有し、
前記DBDシステム(206、306、406)と前記処理チャンバー(216、302、400)との間の距離が、少なくとも3メートルであり、及び
前記反応性ガス(210、408)が、0.2秒間以内に消失する種を除く励起及び化学的反応性種を含む、HVCPにより製造されるガスである、
前記システム(200、300、400)。 - DBDシステム(206、306、406)が、
(i)誘電体(40、60)により完全に囲まれている第1の電極(20)と、
(ii)電気的に接地されている、第2の電極(30)と、
(iii)交流(AC)電圧源(10)と
を含み、
プレナム(50)が、前記第1の電極(20)と第2の電極(30)の間に存在し、及び/又は
前記DBDシステム(206、306、406)が、
(a)複数の第1の電極(20)と、
(b)各々2つの第1の電極(20)間にある複数の第2の電極(30)と、
(c)各隣接する第1の電極(20)と第2の電極(30)間にある少なくとも1つの誘電体バリアとを含み、
第2の電極(30)と同数の第1の電極(20)、又は第2の電極(30)より1つ多い第1の電極(20)があり、
各隣接する第1の電極(20)及び第2の電極(30)がプレナム(50)を形成する、請求項14に記載のシステム(200、300、400)。 - 処理チャンバー(216、302、400)内にコンベヤ(218)を更に含み、及び/又は
反応性ガスをDBDシステム(206、306、406)から前記処理チャンバー(216、302、400)に輸送するためのファン(310、322、410)を更に含む、請求項14又は15に記載のシステム(200、300、400)。 - 処理チャンバー(216、302、400)が、少なくとも8立方メートルの容積を有する、請求項14〜16のいずれかに記載のシステム(200、300、400)。
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US14/921,910 US10194672B2 (en) | 2015-10-23 | 2015-10-23 | Reactive gas, reactive gas generation system and product treatment using reactive gas |
PCT/US2016/057753 WO2017070240A1 (en) | 2015-10-23 | 2016-10-19 | Reactive gas generation system and method of treatment using reactive gas |
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