JP4341000B2 - Processed rice and its manufacturing method - Google Patents

Processed rice and its manufacturing method Download PDF

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JP4341000B2
JP4341000B2 JP2001259901A JP2001259901A JP4341000B2 JP 4341000 B2 JP4341000 B2 JP 4341000B2 JP 2001259901 A JP2001259901 A JP 2001259901A JP 2001259901 A JP2001259901 A JP 2001259901A JP 4341000 B2 JP4341000 B2 JP 4341000B2
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rice
washing
solution
product
saccharification
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JP2003061595A5 (en
JP2003061595A (en
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繁晴 金本
伸宏 松本
裕之 前原
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Satake Corp
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Satake Corp
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【0001】
【発明が属する技術分野】
本発明は、加工米及びその製造方法に関する。
【0002】
【従来の技術】
昨今、炊飯の際の水洗作業を不要にした、いわゆる無洗米が流通している。この無洗米の製造方法としては、精米機により搗精された精白米を研磨ブラシで除糠するものや、澱粉、糠又は糖類などの除糠用の粘着性物質を添加・攪拌した後、これらを選別・除去するものや、精米機により搗精された精白米を極めて短時間に水中搗精した後、脱水乾燥するものなどが知られている。
【0003】
上記のような従来の無洗米の加工方法においては、除糠工程、選別・除去工程又は水中搗精工程で取り分けた糠粉及び胚乳最外層(特に、アリューロン層)の粉状物や、該粉状物が含まれる廃水を、その一部を家畜の飼料としたり、廃水処理施設にて濾過処理や濃縮処理後に廃棄して、糠粉及び胚乳最外層に含まれる栄養成分を有効に利用していなかった。
【0004】
そこで、特開2001-78687号公報には、精白米の胚芽部に含有される栄養分を抽出し、精白米本体に転化浸透させる精米法が提案されているが、このものは、精白米に栄養分を浸透させるものであって、得られた精白米は、無洗米ではないから炊飯前にアリューロン層や糠臭を除去するために水洗しなければならない。また、特開2000-245364号公報には、食感がよく低コストで得られる加工米として、水を注ぐだけで炊くことのできる米粒に、カルシウム、鉄分、ビタミンなどの栄養素が添加された糠を作成し、この糠を前記米粒表面に被覆するものが提案されているが、このものは、廃棄処理予定の糠中に含まれる栄養成分を有効に利用するのではなく、カルシウム、鉄分、ビタミンなど市販されている栄養素を糠の中に新たに添加するのであって、あらゆる栄養素を添加するとなると非常にコストがかかる問題がある。
【0005】
さらに、特公昭46-133663号公報には、水晶様光沢不洗米の製法として、糖液を散布又は噴霧して米粒面を均質に被覆せしめ、次いで軸回転数毎分300〜800程度の搗精機で研磨するものが開示され、特公平6-26507号公報には、搗精又は搗精後研米した精米の表面に、グアーガムなどの1種又は2種以上の水溶液を噴霧した後、乾燥し被覆したものが開示されている。しかし、これらも、糖液やグアーガムなど、被覆するための新たな溶液を準備しなければならず、コストがかかる問題がある。
【0006】
【発明が解決しようとする課題】
本発明は上記問題点にかんがみ、無洗米加工処理の際に生じる糠粉及び胚乳最外層からなる廃棄予定の副産物を有効に利用して、低コストで栄養成分の高い加工米及びその製造方法を提供することを技術的課題とする。
【0007】
【課題を解決するための手段】
上記課題を解決するため本発明は、無洗米加工処理の際に生じる糠粉及び胚乳最外層からなる副産物を、酵素により糖化して粘度の高い溶液を作成し、この溶液を無洗米加工処理した米粒表面にコーティングする、という技術的手段を講じた。
【0008】
これにより、無洗米加工処理の際に生じる糠粉及び胚乳最外層からなる副産物には、糖質が大部分の割合で含有されており(表1参照)、この糖質は水に溶け易くはないのでコーティングに不向きであるが、副産物が含まれる溶液を多糖類に関与するアミラーゼ、繊維質に関与するセルラーゼ及びヘミセルラーゼなどの酵素により糖化すれば、水に溶けやすくなって無洗米加工した米粒表面にコーティングすることが可能となり、このように加工した米粒は、表面に透明感が出るとともに、光沢が生じ、糖質の低分子化により、糖化液が単糖又はオリゴ糖の状態になっているものが多くなり、ほんのりとした甘味も生じるものである。
【0009】
【表1】

Figure 0004341000
【0010】
そして、予め玄米を歩留まり約90〜91%程度に搗精した精白米を使用して無洗米加工する工程と、該無洗米加工により無洗米と糠粉及び胚乳最外層からなる副産物とに分離して取り分ける工程と、取り分けた副産物を糖化して粘度の高い溶液を作成する工程と、得られた糖化液を濃度1〜2重量%で前記無洗米の米粒表面に塗布又は噴霧して米粒表面全体にコーティング処理を行う工程と、を備えたので、無洗米加工処理の際に生じる糠粉及び胚乳最外層からなる廃棄予定の副産物を有効に利用して低コストで栄養成分の高い加工米を製造することが可能となる。
【0011】
【発明の実施の形態】
以下、本発明の実施の一形態である加工米の製造方法を、図1のフローチャートを参照して説明する。
【0012】
まず、通常の精米機により予め玄米を歩留まり約90〜91%程度に搗精した精白米を使用して(ステップ1)、無洗米加工(ステップ2)を行う。この無洗米の加工は、前記精白米を研磨ブラシなどで除糠する方式、前記精白米に粘着性物質を添加して糠粉などを吸着して除糠する方式、又は、前記精白米を極めて短時間に水中搗精して除糠する方式など、いずれの方式をも採用することができる。この無洗米加工により、精米機通過後に米粒表面に存在していた糠粉及び余分なアリューロン層が胚乳部から離脱され、米粒表面にほとんど糠層のない無洗米に仕上げられるのである。
【0013】
次に、精選工程(ステップ3)では、無洗米(ステップ4)と、前記無洗米加工で生じる糠粉及び余分なアリューロン層からなる副産物(ステップ5)とを分離して取り分けるのである。このとき、無洗米加工の方式により糠粉及び余分なアリューロン層からなる副産物の状態が異なり、例えば、精白米を研磨ブラシで除糠する方式であれば、糠粉及びアリューロン層を含む粒度の細かい乾燥した粉末状の副産物として取り分けられ、また、精白米に粘着性物質を添加して糠粉などを吸着して除糠する方式であれば、粘着性物質のリサイクル処理の際に、粘着性物質を乾燥した後、粘着性物質に吸着された糠を剥離するなどの処理を行うので、さらに粒度の細かい乾燥した粉末状の副産物として取り分けられる。一方、精白米を極めて短時間に水中搗精して除糠する方式であれば、その廃水は糠粉及び余分なアリューロン層が含まれる溶液状の副産物として取り分けられるのである。従来、これらの副産物はその一部を家畜の飼料としたり、廃水処理施設にて濾過処理や濃縮処理後に廃棄されるものである。
【0014】
次に、上記ステップ5で得られた副産物は、溶液状であるか否かを確認して(ステップ6)、もし、溶液状以外の、例えば、粉末状の副産物であれば水を加えて混合し(ステップ7)、副産物懸濁液を作成する。この副産物懸濁液の濃度は、後述の糖化処理に適した10重量%程度が好ましいので、濃度が10重量%程度であるか否か確認する(ステップ8)。もし、濃度が10重量%程度から外れていれば、希釈して濃度を調整し(ステップ9)、次工程の糖化を行う(ステップ10)。
【0015】
ステップ10の糖化であるが、以下のようにして行われる。糠粉及びアリューロン層を含む副産物には、糖質として、澱粉、セルロース及びヘモセルロースが含まれており、水に溶け易くない状態にある。まず、上記副産物懸濁液に、澱粉などの多糖類の糖化に関与する酵素α−アミラーゼを適宜の割合で混合し、良好に酵素の働きが促進する所定のpH、例えば、pH5.0〜6.0となるように調整し、温度を60℃〜120℃の範囲で30分〜4時間程度加熱しながら糖化を行う。
【0016】
なお、副産物懸濁液を60℃〜120℃の範囲で加熱するのは、α−アミラーゼが活性化しやすい状態にするためである。
【0017】
次に、このα−アミラーゼで処理した副産物懸濁液を、温度及びpHを適宜、例えば30℃〜40℃の範囲で、pH5.0〜6.0となるように調整する。そして、この副産物懸濁液に、さらに、α−アミラーゼとは異なる酵素として、βアミラーゼ、グルコシダーゼを適宜の割合で混合する。さらには、副産物に糖質としてセルロール及びヘミセルロースが含まれているから、繊維質となるセルロール及びヘミセルロースの分解に関与する酵素として、セルラーゼ及びヘミセルラーゼを適宜の割合で混合する。また、タンパク質の分解に関与する酵素としてプロテアーゼを、脂質の分解に関与する酵素としてリパーゼを適宜の割合で混合してもよい。
【0018】
この後、副産物懸濁液に混合したα−アミラーゼ、β−アミラーゼ、グルコシダーゼ、グルコシダーゼ、セルラーゼ、ヘミセルラーゼ、プロテアーゼ及びリパーゼなどの酵素により分解された分解液は、例えば、濾過工程に移行され(ステップ11)、残滓を分離除去して糖化液を得る(ステップ12)。さらに、この糖化液には、無洗米加工の副産物に存在しないか、または、少ない可溶性のビタミン、ミネラルなどの栄養成分を添加してもよい。このように形成した糖化液は水飴状に近い粘度の高い状態であり、この糖化液を濃度1〜2重量%で、ステップ4で得られた無洗米の米粒表面に塗布又は噴霧して米粒表面全体にコーティング処理を行うと、糖化液コーティング無洗米(以下、コーティング加工米という。)ができ上がる(ステップ13)。
【0019】
図2は糖化液を無洗米の米粒表面にコーティングする装置の概略図を示してあり、例えば、糖化液添加手段10と、乾燥手段11とにより斑(むら)のない均一なコーティング加工米に仕上げることができる。
【0020】
糖化液添加手段10には、糖化液タンク12から、糖化液供給パイプ13により糖化液が糖化液添加手段10に供給されるようになっており、パイプ13の途中には、流量を調節するためのバルブ14が設けられている。糖化液は、タンク12から、このパイプ13を通って糖化液添加手段10内に設けたスクリュー15に導かれる。該スクリュー15は図示しない駆動手段によって適宜な回転数により回転される。
【0021】
乾燥手段11には、多孔状で多少傾斜した平網16が設けられ、平網の下方に設けたブロア17から送給される、例えば、30〜60℃の温風により、米粒表面に添加した糖化液を乾燥させる。平網16の傾斜下方側には、排出樋18が設けられており、コーティング加工米が乾燥手段11外部に排出される。
【0022】
上記したコーティング装置の作用を説明する。糖化液添加手段10に導入された無洗米は、糖化液タンク12からパイプ13を経由して滴下される糖化液と攪拌され、無洗米の表面に糖化液が塗布される。糖化液添加手段10の排出口から排出された、糖化液が塗布された無洗米は、乾燥手段11に投入される。乾燥手段11では、ブロア17により図示しないヒータ−で温められた空気が平網16上へ供給され、この温風を受けながら平網16上で糖化液を塗布された無洗米が転動し、糖化液が乾燥させられる。乾燥したコーティング加工米は、乾燥手段11の排出樋18から外部に排出される。
【0023】
本実施形態のコーティング加工米は、コーティング層により米粒表面が空気と接触し難いため、酸化が生じ難く、品質を保持しやすい利点がある。また、糖化液によりコーティングしているため、糖化液が単糖又はオリゴ糖の状態になっているものが多く、わずかに甘味が生じる利点がある。つまり、このコーティング加工米を炊飯して食すると、従来のコーティングしていない無洗米に比較して、ほのかに甘いご飯となる。そして、コーティングすることで米粒表面に透明感が出るとともに、光沢が生じて見た目がよくなり、商品価値も向上するものである。
【0024】
以下、本発明のコーティング加工米と従来の無洗米との比較を、▲1▼栄養、▲2▼食味の観点で考察する。
【0025】
【表2】
Figure 0004341000
【0026】
表2はコーティング加工米と無洗米との栄養比較を示したものであり、本発明実施形態のコーティング加工米は、ナトリウム、カリウム、マグネシウム、フィチン酸、ビタミンB6、ビタミンEなどの12項目の栄養素において、従来の無洗米よりも含有量が大幅に上回っていることが分かった。
【0027】
【表3】
Figure 0004341000
【0028】
表3はコーティング加工米と無洗米との食味試験の結果を比較して示したものであり、本発明実施形態のコーティング加工米は、総合評価、香り、外観、光沢、甘味、味、粘り、硬さの8項目において、従来の無洗米よりも評価が向上していることが分かった。
【0029】
【発明の効果】
以上のように本発明によれば、無洗米加工処理の際に生じる糠粉及び胚乳最外層からなる副産物を、酵素により糖化して粘度の高い溶液を作成し、この溶液を無洗米加工処理した米粒表面にコーティングする、という技術的手段を講じたので、無洗米加工処理の際に生じる糠粉及び胚乳最外層からなる副産物には、糖質が大部分の割合で含有されており、この糖質は水に溶け易くはないのでコーティングに不向きであるが、副産物が含まれる溶液を多糖類に関与するアミラーゼ、繊維質に関与するセルラーゼ及びヘミセルラーゼなどの酵素により糖化すれば、水に溶けやすくなって無洗米加工した米粒表面にコーティングすることが可能となり、このように加工した米粒は、表面に透明感が出るとともに、光沢が生じ、糖質の低分子化により、糖化液が単糖又はオリゴ糖の状態になっているものが多くなり、ほんのりとした甘味も生じるものである。
【0030】
そして、あらかじめ玄米を歩留まり90〜91%程度に搗精した精白米を使用し、精白米を研磨ブラシで除糠する方式、精白米に粘着性物質を添加して糠粉などを吸着して除糠する方式、又は精白米を極めて短時間に水中搗精して除糠する方式の中から選択される無洗米に加工する無洗米加工工程と、無洗米と糠粉及び胚乳最外層からなる副産物とに分離して取り分ける精選工程と、取り分けた副産物が粉末状であった場合に、水を加えて溶液状にし、さらに濃度が10%重量となるように調整して副産物懸濁液を作成する前処理工程と、該副産物懸濁液を糖化して粘度の高い溶液を作成する糖化工程と、得られた糖化液を濃度1〜2重量%で前記無洗米の米粒表面に塗布又は噴霧して米粒表面全体にコーティング処理を行うコーティング工程と、を備えたので、研磨ブラシで除糠する方式、粘着性物質を添加して糠粉などを吸着して除糠する方式、又は水中搗精して除糠する方式の中から選択される無洗米加工処理の際に生じる糠粉及び胚乳最外層からなる廃棄予定の副産物を、溶液状であるか、粉末状であるかを確認し、粉末状であれば、水を加えて溶液状にし、さらに、濃度が10%重量であるか否かを確認した後、糖化工程に移行する。すなわち、複数の無洗米加工方式のうち、いずれの加工方式を利用した場合であっても、廃棄予定の副産物を有効に利用することができ、従来、大量に廃棄していた副産物の廃棄をゼロにして、低コストで環境にやさしく、しかも、糠粉及び胚乳最外層に含有する栄養成分を付加することになるから、栄養価の高い加工米を製造することが可能となる。
【図面の簡単な説明】
【図1】本発明の実施の一形態である加工米の製造方法を示すフローチャートである。
【図2】糖化液を無洗米の米粒表面にコーティングする装置の概略図である。
【符号の説明】
10 糖化液添加手段
11 乾燥手段
12 糖化液タンク
13 糖化液供給パイプ
14 バルブ
15 スクリュー
16 平網
17 ブロア
18 排出樋[0001]
[Technical field to which the invention belongs]
The present invention relates to processed rice and a method for producing the same.
[0002]
[Prior art]
Nowadays, so-called non-washed rice has been circulated, which eliminates the need for water washing during cooking. This washing-free rice can be produced by removing polished rice milled with a rice mill with a polishing brush, or after adding / stirring an adhesive substance for removing rice, such as starch, rice bran or sugar. There are known ones that are sorted and removed, and ones that have been refined in water in a very short period of time after the milled milled rice has been dewatered and dried.
[0003]
In the conventional washing-free rice processing method as described above, the powdered powder of the starch and the endosperm outermost layer (especially the Aleurone layer) separated in the dehulling process, sorting / removing process or submerged scouring process, Waste water containing food is partly used as livestock feed or discarded after filtration or concentration at wastewater treatment facilities, and the nutrients contained in the outermost layer of starch and endosperm are not used effectively It was.
[0004]
Therefore, Japanese Patent Laid-Open No. 2001-78687 proposes a rice milling method in which a nutrient contained in the germ part of polished rice is extracted and converted into the polished rice body. Since the obtained polished rice is not washed rice, it must be washed with water to remove the Aleurone layer and odor before cooking rice. In addition, JP 2000-245364 A discloses a processed rice that has a good texture and can be obtained at low cost, and that rice grains that can be cooked simply by pouring water are added with nutrients such as calcium, iron, and vitamins. It has been proposed to coat the surface of the rice grains with this rice bran, but this does not effectively use the nutrients contained in the rice cake to be disposed of, but it contains calcium, iron and vitamins. There is a problem that it is very costly to add all the nutrients that are commercially available to the bowl.
[0005]
Furthermore, in Japanese Examined Patent Publication No. 46-133663, as a method for producing crystal-like lusterless washed rice, a sugar solution is sprayed or sprayed to uniformly coat the rice grain surface, and then a milling machine with a shaft speed of about 300 to 800 per minute. In Japanese Patent Publication No.6-26507, the surface of polished rice after polishing or polishing is sprayed with one or more aqueous solutions such as guar gum, and then dried and coated. Are disclosed. However, these also require a new solution for coating, such as a sugar solution and guar gum, which is expensive.
[0006]
[Problems to be solved by the invention]
In view of the above problems, the present invention effectively uses a by-product to be disposed of consisting of starch powder and endosperm outermost layer produced during washing-free rice processing, and provides a low-cost, high-nutrient processed rice and a method for producing the same. Providing is a technical issue.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention produces a high-viscosity solution by saccharifying the by-product consisting of starch powder and endosperm outermost layer produced during the washing-free rice processing, and this solution was washed without washing. Technical measures were taken to coat the surface of rice grains.
[0008]
As a result, the by-product consisting of the starch and the endosperm outermost layer produced during the washing-free rice processing contains a large proportion of sugar (see Table 1), and this sugar is not easily soluble in water. It is not suitable for coating because it is not suitable for coating, but if the solution containing by-products is saccharified with enzymes such as amylase involved in polysaccharides, cellulase and hemicellulase involved in fiber, it will be easily soluble in water and will be washed without washing It becomes possible to coat the surface, and the rice grains processed in this way have a transparent feeling on the surface and gloss, and due to the low molecular weight of the sugar, the saccharified solution becomes a monosaccharide or oligosaccharide state. Many things are present, and a slight sweetness is also generated.
[0009]
[Table 1]
Figure 0004341000
[0010]
And the process of washing-free rice processing using the polished rice previously yielded brown rice and yielded about 90-91%, and the washing-free rice processing separated into washing-free rice and by-products consisting of starch powder and endosperm outermost layer A step of separating, a step of saccharifying the separated by-product to create a highly viscous solution, and applying or spraying the obtained saccharified solution to the entire surface of the rice grain by applying or spraying it on the surface of the rice grain without washing at a concentration of 1 to 2% by weight And a process for performing the coating process, so that low-cost and high-nutrient processed rice can be produced by effectively utilizing the by-products to be disposed of consisting of the starch and the endosperm outermost layer produced during the washing-free rice processing. It becomes possible.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the manufacturing method of the processed rice which is one Embodiment of this invention is demonstrated with reference to the flowchart of FIG.
[0012]
First, using the polished rice that has been brown rice yielded by about 90-91% in advance with an ordinary rice mill (step 1), washing-free rice processing (step 2) is performed. This washing-free rice processing is a method of removing the polished rice with a polishing brush, a method of adding a sticky substance to the polished rice and adsorbing the rice flour, etc., or removing the polished rice extremely Any method can be employed, such as a method of dewatering and removing in a short time. By this washing-free rice processing, the starch powder and the extra aleurone layer that existed on the surface of the rice grain after passing through the rice milling machine are separated from the endosperm portion, and the rice grain surface is finished with no washing layer.
[0013]
Next, in the selection process (step 3), the washing-free rice (step 4) is separated from the by-product (step 5) consisting of the flour and extra aleurone layer produced by the washing-free rice processing. At this time, the state of the by-product consisting of rice flour and an extra aleurone layer differs depending on the washing-free rice processing method.For example, if the method is to remove polished rice with a polishing brush, the fine particle size including the rice flour and the aleurone layer is fine. If it is a system that can be separated as a dry powdery by-product and adsorbs and removes sticky powder by adding a sticky substance to milled rice, the sticky substance will be used when the sticky substance is recycled. After drying, a process such as peeling off the wrinkles adsorbed on the sticky substance is performed, so that it can be separated as a fine powdery dry powder by-product. On the other hand, if the milled rice is refined in water in a very short time, the wastewater is separated as a solution by-product containing starch and an extra aleurone layer. Conventionally, some of these by-products are used as feed for livestock, or are discarded after filtration or concentration at a wastewater treatment facility.
[0014]
Next, it is confirmed whether or not the by-product obtained in the above step 5 is in a solution state (step 6), and if it is a by-product other than the solution state, for example, a powder form, water is added and mixed. (Step 7) to create a by-product suspension. Since the concentration of this by-product suspension is preferably about 10% by weight suitable for the saccharification treatment described later, it is confirmed whether or not the concentration is about 10% by weight (step 8). If the concentration deviates from about 10% by weight, the concentration is diluted to adjust the concentration (step 9), and saccharification is performed in the next step (step 10).
[0015]
The saccharification in step 10 is performed as follows. By-products including the cocoon powder and the aleurone layer include starch, cellulose and hemocellulose as carbohydrates, and are not easily soluble in water. First, an enzyme α-amylase involved in saccharification of polysaccharides such as starch is mixed with the by-product suspension at an appropriate ratio, and a predetermined pH at which the action of the enzyme is promoted well, for example, pH 5.0 to 6 The saccharification is carried out while heating at a temperature in the range of 60 ° C. to 120 ° C. for about 30 minutes to 4 hours.
[0016]
The reason why the by-product suspension is heated in the range of 60 ° C. to 120 ° C. is to make α-amylase easy to activate.
[0017]
Next, the temperature and pH of the by-product suspension treated with α-amylase are adjusted to pH 5.0 to 6.0, for example, in the range of 30 ° C. to 40 ° C., as appropriate. Then, β-amylase and glucosidase are further mixed in this by-product suspension as an enzyme different from α-amylase at an appropriate ratio. Furthermore, since cellulose and hemicellulose are contained as carbohydrates in the by-product, cellulase and hemicellulase are mixed at an appropriate ratio as enzymes involved in the degradation of cellulose and hemicellulose that are fibrous. Protease may be mixed as an enzyme involved in protein degradation, and lipase may be mixed in an appropriate ratio as an enzyme involved in lipid degradation.
[0018]
Thereafter, the degradation solution decomposed by enzymes such as α-amylase, β-amylase, glucosidase, glucosidase, cellulase, hemicellulase, protease and lipase mixed in the by-product suspension is transferred to, for example, a filtration step (step 11) The residue is separated and removed to obtain a saccharified solution (step 12). Further, this saccharified solution may contain nutrient components such as vitamins and minerals which are not present in the by-product of the non-washed rice processing or are less soluble. The saccharified solution thus formed is in a state of high viscosity close to a syrup shape, and this saccharified solution is applied to or sprayed on the surface of the unwashed rice grain obtained in Step 4 at a concentration of 1 to 2% by weight. When the coating treatment is performed on the whole, saccharified solution-coated non-washed rice (hereinafter referred to as coated rice) is completed (step 13).
[0019]
FIG. 2 is a schematic view of an apparatus for coating the surface of a rice grain of saccharified rice with no saccharified liquid. For example, the saccharified liquid adding means 10 and the drying means 11 finish a uniform coated rice having no spots (unevenness). be able to.
[0020]
In the saccharified solution adding means 10, the saccharified solution is supplied from the saccharified solution tank 12 to the saccharified solution adding means 10 through the saccharified solution supply pipe 13. The valve 14 is provided. The saccharified liquid is guided from the tank 12 through the pipe 13 to the screw 15 provided in the saccharified liquid adding means 10. The screw 15 is rotated at an appropriate number of rotations by driving means (not shown).
[0021]
The drying means 11 is provided with a flat mesh 16 which is porous and slightly inclined, and is added to the surface of the rice grains by, for example, hot air of 30 to 60 ° C. fed from a blower 17 provided below the flat mesh. Dry the saccharified solution. A discharge trough 18 is provided on the lower side of the flat net 16 and the coated rice is discharged outside the drying means 11.
[0022]
The operation of the above coating apparatus will be described. The non-washed rice introduced into the saccharified solution adding means 10 is stirred with the saccharified solution dripped from the saccharified solution tank 12 via the pipe 13, and the saccharified solution is applied to the surface of the non-washed rice. Unwashed rice coated with the saccharified solution discharged from the outlet of the saccharified solution adding means 10 is put into the drying means 11. In the drying means 11, air warmed by a blower 17 by a heater (not shown) is supplied onto the flat net 16, and the unwashed rice coated with the saccharified solution rolls on the flat net 16 while receiving this hot air, The saccharified solution is dried. The dried coated rice is discharged to the outside from the discharge basket 18 of the drying means 11.
[0023]
The coated rice of this embodiment has the advantage that the surface of the rice grains is less likely to come into contact with air due to the coating layer, so that oxidation is unlikely to occur and the quality is easily maintained. In addition, since the saccharified solution is coated with a saccharified solution, there are many cases where the saccharified solution is in a monosaccharide or oligosaccharide state, and there is an advantage that a slight sweetness is generated. That is, when this coated rice is cooked and eaten, it becomes a slightly sweeter rice than conventional uncoated rice. By coating, the surface of the rice grain becomes transparent, gloss is generated and the appearance is improved, and the commercial value is improved.
[0024]
Hereinafter, the comparison between the coated processed rice of the present invention and the conventional non-washed rice will be considered in terms of (1) nutrition and (2) taste.
[0025]
[Table 2]
Figure 0004341000
[0026]
Table 2 shows the nutritional comparison between the coated rice and the non-washed rice. The coated rice of the embodiment of the present invention has 12 items of nutrients such as sodium, potassium, magnesium, phytic acid, vitamin B6, vitamin E and the like. It was found that the content was significantly higher than that of conventional non-washed rice.
[0027]
[Table 3]
Figure 0004341000
[0028]
Table 3 shows a comparison of the results of the taste test between the coated rice and the non-washed rice, and the coated rice of the embodiment of the present invention has a comprehensive evaluation, aroma, appearance, gloss, sweetness, taste, stickiness, In 8 items of hardness, it turned out that evaluation is improving rather than the conventional non-washed rice.
[0029]
【The invention's effect】
As described above, according to the present invention, the by-product consisting of the starch and the endosperm outermost layer produced during the washing-free rice processing is saccharified with an enzyme to create a high-viscosity solution, and this solution was subjected to washing-free rice processing. Since the technical means of coating the surface of the rice grain was taken, the by-product consisting of starch powder and endosperm outermost layer produced during the washing-free rice processing contains a large proportion of sugar. The quality is not suitable for coating because it is not easily soluble in water, but if a solution containing by-products is saccharified with enzymes such as amylase, polysaccharides, cellulase and hemicellulase, which are involved in polysaccharides, it is easily soluble in water. It becomes possible to coat the surface of rice grains that have been washed without washing, and the rice grains that have been treated in this way have a transparent surface and gloss, resulting in a low molecular weight sugar. That sugar solution is in the state of the monosaccharide or oligosaccharide is increased, but also caused faint sweetness.
[0030]
And, using polished rice that has been polished to 90-91% yield of brown rice in advance, remove the polished rice with a polishing brush, add sticky substance to the polished rice and adsorb rice cake powder etc. A washing-free rice processing process that is processed into washing-free rice selected from a method of scouring and removing milled rice in a very short time, and a by-product consisting of washing-free rice and the outermost layer of starch and endosperm Preselection process that separates and separates, and pre-treatment that creates a by-product suspension by adjusting the concentration to 10% by weight by adding water when the separated by-product is in powder form A saccharification step of saccharifying the by-product suspension to create a high viscosity solution, and applying or spraying the obtained saccharified solution to the surface of the rice grain without washing at a concentration of 1 to 2% by weight Coating worker who performs coating processing on the whole If, because with a method of dividing bran with an abrasive brush, scheme bran removing adsorbed and bran powder by adding a tacky substance, or water pearling to free chosen from bran removing to scheme By-products that are planned to be disposed of consisting of the starch powder and endosperm outermost layer produced during the washing process are confirmed to be in solution or powder form.If powdered, water is added to form a solution. Further, after confirming whether or not the concentration is 10% by weight, the process proceeds to the saccharification step. In other words, even if any of the multiple washing-free rice processing methods is used, the by-products to be disposed of can be used effectively, and zero disposal of by-products that have been disposed of in the past has been zero. Thus, it is possible to produce processed rice with high nutritional value because it is environmentally friendly at a low cost and the nutrient components contained in the outermost layer of starch and endosperm are added.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a method for producing processed rice according to an embodiment of the present invention.
FIG. 2 is a schematic view of an apparatus for coating a saccharified solution on the surface of rice grains without washing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Saccharified liquid addition means 11 Drying means 12 Saccharified liquid tank 13 Saccharified liquid supply pipe 14 Valve 15 Screw 16 Flat net 17 Blower 18 Discharge basin

Claims (4)

あらかじめ玄米を歩留ま90〜91%程度に搗精した精白米を使用し、精白米を研磨ブラシで除糠する方式、精白米に粘着性物質を添加して糠粉などを吸着して除糠する方式、又は精白米を極めて短時間に水中搗精して除糠する方式の中から選択される無洗米加工する無洗米加工工程と、無洗米と糠粉及び胚乳最外層からなる副産物とに分離して取り分ける精選工程と、取り分けた副産物が粉末状であった場合に、水を加えて溶液状にし、さらに濃度が10%重量となるように調整して副産物懸濁液を作成する前処理工程と、該副産物懸濁液を糖化して粘度の高い溶液を作成する糖化工程と、得られた糖化液を濃度1〜2重量%で前記無洗米の米粒表面に塗布又は噴霧して米粒表面全体にコーティング処理を行うコーティング工程と、を備えたことを特徴とする加工米の製造方法。Pre brown rice using a polished rice was pearling to about 90-91% of remains engaged step a, scheme for bran removing the polished rice with polishing brushes, divided by adsorbing like bran powder by adding a tacky material polished rice A washing-free rice processing process that is processed into washing-free rice selected from a method of kneading , or a method of polishing and removing milled rice in a very short time, and a by-product consisting of washing-free rice and the outermost layer of starch and endosperm In the case where the separated by-product is separated and separated, and the separated by-product is in the form of powder, before making a by-product suspension by adding water to make a solution and adjusting the concentration to 10% weight A saccharification step of saccharifying the by- product suspension to create a highly viscous solution, and applying or spraying the obtained saccharified solution to the surface of the rice grain without washing at a concentration of 1 to 2% by weight A coating process for coating the entire surface; Processing rice method of manufacture which is characterized in that there was example. 前記糖化工程は、前記副産物懸濁液に澱粉など多糖類の糖化に関与する酵素αアミラーゼを添加してpH5.0〜6.0、温度60〜120℃、30分〜4時間程度加熱しながら糖化し、次いで、βアミラーゼ及びグルコシダーゼを混合し、さらに、セルロース及びヘミセルロースなど繊維質の分解に関与するセルラーゼ及びヘミセルラーゼを混合し、また、タンパク質の分解に関与するプロテアーゼ、及び脂質の分解に関与するリパーゼを混合してなる請求項1記載の加工米の製造方法。  In the saccharification step, an enzyme α-amylase involved in saccharification of polysaccharides such as starch is added to the by-product suspension and heated at pH 5.0 to 6.0, temperature 60 to 120 ° C., for 30 minutes to 4 hours. Saccharification, then mixing β-amylase and glucosidase, and further mixing cellulase and hemicellulase involved in the degradation of fibers such as cellulose and hemicellulose, and also involved in protease and lipid degradation involved in protein degradation The method for producing processed rice according to claim 1, wherein lipase is mixed. 前記糖化工程と前記コーティング工程との間には、前記糖化工程において作成された分解液をろ過し、残渣を除去して糖化液を得るろ過工程を備えてなる請求項1又は2のいずれかに記載の加工米の製造方法。  3. The method according to claim 1, further comprising a filtration step between the saccharification step and the coating step, wherein the decomposition solution prepared in the saccharification step is filtered and the residue is removed to obtain a saccharification solution. The manufacturing method of the described processed rice. 請求項1から3のいずれかに記載の加工米の製造方法によって得られる、無洗米加工処理の際に生じる糠粉及び胚乳最外層からなる副産物を、酵素により糖化して粘度の高い溶液を作成して、この溶液を無洗米加工処理した米粒表面にコーティングした加工米。  A by-product consisting of starch flour and endosperm outermost layer produced during the washing-free rice processing obtained by the method for producing processed rice according to any one of claims 1 to 3 is saccharified with an enzyme to create a highly viscous solution. And the processed rice which coated this grain surface which processed this solution without washing rice.
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