EP2269739B1 - Procédé de préparation de broyage de céréales - Google Patents

Procédé de préparation de broyage de céréales Download PDF

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Publication number
EP2269739B1
EP2269739B1 EP09164321.3A EP09164321A EP2269739B1 EP 2269739 B1 EP2269739 B1 EP 2269739B1 EP 09164321 A EP09164321 A EP 09164321A EP 2269739 B1 EP2269739 B1 EP 2269739B1
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EP
European Patent Office
Prior art keywords
grain
weight
fraction
cereal
cereal grain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09164321.3A
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German (de)
English (en)
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EP2269739A1 (fr
Inventor
Walter Eugster
Jürgen Winter
Uwe Schill
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Buehler AG
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Buehler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to EP09164321.3A priority Critical patent/EP2269739B1/fr
Priority to ES09164321.3T priority patent/ES2563042T3/es
Priority to EP15194089.7A priority patent/EP3009191A1/fr
Publication of EP2269739A1 publication Critical patent/EP2269739A1/fr
Application granted granted Critical
Publication of EP2269739B1 publication Critical patent/EP2269739B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02B—PREPARING GRAIN FOR MILLING; REFINING GRANULAR FRUIT TO COMMERCIAL PRODUCTS BY WORKING THE SURFACE
    • B02B1/00—Preparing grain for milling or like processes
    • B02B1/04—Wet treatment, e.g. washing, wetting, softening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02B—PREPARING GRAIN FOR MILLING; REFINING GRANULAR FRUIT TO COMMERCIAL PRODUCTS BY WORKING THE SURFACE
    • B02B3/00—Hulling; Husking; Decorticating; Polishing; Removing the awns; Degerming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02B—PREPARING GRAIN FOR MILLING; REFINING GRANULAR FRUIT TO COMMERCIAL PRODUCTS BY WORKING THE SURFACE
    • B02B3/00—Hulling; Husking; Decorticating; Polishing; Removing the awns; Degerming
    • B02B3/04—Hulling; Husking; Decorticating; Polishing; Removing the awns; Degerming by means of rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02B—PREPARING GRAIN FOR MILLING; REFINING GRANULAR FRUIT TO COMMERCIAL PRODUCTS BY WORKING THE SURFACE
    • B02B5/00—Grain treatment not otherwise provided for
    • B02B5/02—Combined processes

Definitions

  • the invention relates to the field of milling, in particular the Mahlvor admirability of cereals.
  • the grain has, simplified, a triple shell structure.
  • the outer shell layer comprises the epidermis, longitudinal and transverse cells as well as tubular cells. This outer shell layer can make up to 5.5% by weight of the whole grain.
  • the next inner layer is a double layer of a so-called dye layer and a colorless layer; for this double layer, a proportion of about 2.5% by weight of the whole grain is assumed.
  • the next inner layer is called the aleurone layer and comprises about 7% by weight of the whole grain. Inside the grain is to find the germ (about 2.5 wt .-% of the total grain), as well as the actual meal body, which accounts for the rest to 100 Automatgew .-%.
  • DE 1 164 210 proposes a multi-stage process in which already in a first step, the shell components are replaced in an amount of 2.8 to 3.6 wt .-% of the cereal grain. In a second step, another 0.4 to 2.1 wt .-% of the cereal grain are replaced again. In total, between 3.2 and 5.7% by weight of the cereal grain are replaced cumulatively in this process.
  • the document GB 2 268 386 A discloses a method for treating cereal grains prior to milling, in which the grains are wetted, a first fraction of the bran wrap is removed, the grains are cleaned and then moistened again, and then the remaining portion of the bran wrap is removed.
  • the weight fraction of the first fraction which is removed after the first moistening is not disclosed.
  • EP 0 810 031 A2 discloses a pretreatment process for cereal grains with a total of three polishing steps. Again, however, the weight fraction of the outer layer removed in the first step is not mentioned.
  • the invention has for its object to provide a method by which both contaminated outermost layers of the grain can be reliably removed as well as the grain as much as possible can be added to a value-added use.
  • the method should also be as simple, efficient and inexpensive feasible.
  • step c 0.2 to 2% by weight of the cereal are removed in step c), preferably 0.2 to 1% by weight, particularly preferably 0.2 to 0.5% by weight.
  • step c) only the surface layer is removed to such an extent that contamination as environmental toxins and / or other impurities are removed. Surprisingly, it has been found that for this purpose the removal of only 0.2 to 0.5 wt .-% is completely sufficient to obtain largely contamination-free cereal grains.
  • step e) another layer is removed which is then substantially free of contaminants and which substantially contains dietary fiber of the crop. The thus obtained, contamination-free dietary fibers can be supplied as value components of a further use.
  • dietary fibers are understood as meaning the total dietary fibers, determined in accordance with AOAC 985.29.
  • the provision of grain in step a) can take place with so-called “storage moisture” or "ground moisture”.
  • slaughter moisture is carried out with a moisture content of ⁇ 14 wt .-%, preferably 14 to 20 wt .-%, more preferably 15 to 20 wt.%, Particularly preferably 15 to 17 wt .-%, said moisture as possible is largely homogeneously distributed in the grain, as it is optimal for the milling process.
  • the provision with "storage moisture” is preferably carried out with a moisture content of ⁇ 14 wt .-%, preferably 8 to 13.99 wt .-%, particularly preferably 10 to ⁇ 13.99 wt .-%.
  • grain with the o.g. "Storage moisture” is provided, typically between 0.1 to 4 wt.%, Preferably 0.2 to 2.5 wt.%, Of water is added (based on the resulting total weight).
  • the conditioning in steps b) and d) can take place directly during the meshing of the grain, for example in a vortexer. However, the conditioning can also take place only partially directly during meshing (for example, in a screw conveyor, is fed into the water), in which case then a separate conditioning of the strained cereal takes place (eg. In a screw conveyor, in which no additional water is fed more ).
  • step b) during a period of ⁇ 1 hour, preferably for ⁇ 10 minutes, more preferably for about 5 seconds to 5 minutes, more preferably about 8 seconds to 30 seconds. This meshing is preferably done in a vortexer.
  • step d it is wetted and conditioned for about 0.5 to 30 minutes, preferably 0.5 to 15 minutes, more preferably 1 to 5 minutes.
  • This network is preferably carried out in a network and residence screw conveyor. While in step c) only just as much surface layer of the grain is removed that a substantially contamination-free residual grain is obtained in step e) a fraction with the highest possible dietary fiber content is obtained, the flour body should not be damaged as possible.
  • the proportion of the second fraction obtained in step e) in% by weight of the total grain may vary depending on the type of cereal and the contaminated layer removed in step c). However, proper control of the process can be readily determined by routine experimentation; For this purpose, the content of total food fibers of the second fraction and the content of starch (as an indication of damage to the endosperm) can be used (individually or in combination).
  • the second fraction removed in step e) has a total dietary fiber content of ⁇ 60% by weight, preferably ⁇ 70% by weight, more preferably ⁇ 80% by weight.
  • the second fraction removed in step e) has a starch content of ⁇ 20% by weight, preferably ⁇ 15% by weight, particularly preferably ⁇ 10% by weight.
  • starch The content of starch is determined in the context of the invention according to the Swiss Food Book SLMB (2002), chapter 3.6.1.
  • step e) is carried out in several substeps e 1 ) to e n ).
  • the fractions obtained in such sub-steps may in particular contain varying amounts of grain (in% by weight of the total weight of the cereal used). hereby a particularly fine approach to a maximally exposed flour body can be achieved; In particular, the isolated fraction can be chosen the smaller, the more dietary fibers have already been removed.
  • the fractions or partial amounts thereof obtained in substeps e 1 ) to e n ) can be mixed with one another such that the mixture has a total dietary fiber content of ⁇ 60% by weight, preferably ⁇ 70% by weight, more preferably ⁇ 80% by weight.
  • the first partial fractions typically have a total dietary fiber content of> 80% by weight, in particular> 85% by weight. Later partial fractions can - despite lower content of total dietary fiber - also isolated and mixed with the former sub-fractions, as long as this does not fall below a desired total dietary fiber content (or a maximum tolerated starch content, see below).
  • the fractions or partial amounts thereof obtained in substeps e 1 ) to e n ) can be mixed with one another such that the mixture has a starch content of 20% by weight, preferably ⁇ 15% by weight, more preferably ⁇ 10% by weight.
  • the first partial fractions typically have a starch content of ⁇ 6% by weight, in particular of ⁇ 5% by weight. Later sub-fractions can - despite higher content of starch - also still isolated and mixed with the former sub-fractions, provided that this maximum tolerated starch content is not exceeded (or a desired content of total food fibers is not exceeded).
  • the meshing and conditioning takes place in steps b) and d) and, if appropriate, between substeps e 1 ) to e n ) with a swirling network or with a network and residence-screw conveyor.
  • a vortex setter has surprisingly been found to be particularly suitable for use in step b), whereas the net and indwelling screw conveyor has proved to be particularly effective in step d) and optionally between sub-steps e 1 ) to e n );
  • the sequential use of a net screw conveyor (with added water) and a subsequent residence screw conveyor (without addition of water) has proven to be particularly advantageous.
  • peeling is particularly advantageously achievable essentially by grain / grain friction, as already explained above in connection with the method according to the invention.
  • stator planar segments As processing tools can be provided on the stator planar segments; But these segments can also be equipped with baffles, cams o. The like.
  • knobs o As editing tools on the rotor projecting strips, knobs o. The like. Be provided.
  • the baskets can be adapted to the specific application (in particular to the respective type of grain) with expert routine tests, in particular in their hole dimensions.
  • Another disclosed but not claimed aspect relates to the use of dietary fibers obtained by a process as described above, in particular with a plant as described above, as an additive in foods, in particular baked goods, preferably breads; cereals; Snacks, in particular bars; Beverages; Dairy products, in particular yoghurt; Food supplements; Diet food.
  • substantially contamination-free dietary fibers can be obtained in a particularly simple and high yield, which can thus be supplied to a further use.
  • the resulting, Treated (freed from an outer layer of the shell components) Korngut can also be further processed.
  • a stand-off cell (not shown) is fed to the process with a defined moisture content.
  • the grain first passes through a magnet 1 for sorting out metallic parts.
  • the grain is fed to a Wirbeletzer 2, which has a water supply 3 for meshing the grain.
  • the vortexer 2 is added in the description Fig. 6 explained in more detail.
  • the corn is fed to a first device for peeling surface treatment of the grain, namely a so-called Light Peeler 4; this is related to Fig. 2 and Fig. 3 explained in more detail.
  • a peeler 12 can also be used; this is related to Fig.
  • the fiber fraction leaving the Light Peeler 4 (or Peeler 12) can be recycled (not shown).
  • the grain fraction is passed through an aspiration channel 5.
  • the grain is then fed to a depot 6, in which it can be stored temporarily to compensate for different capacities of the individual process stages.
  • a balance 7 can be ensured that the subsequent process stages defined amounts of grain are supplied, which is essential in particular for the subsequent network.
  • a net screw conveyor 8 the grain is wetted and promoted at the same time; the net screw conveyor 8 is fed via a water supply 9 with water.
  • the strained grain is then conditioned in an indwelling screw conveyor 10.
  • auger conveyor 8 and indwelling screw conveyor 10 are identical except for the water supply and is associated with Fig. 7 explained in more detail.
  • the strained grain is in turn passed to a magnet 11 to sort out any metallic contaminants.
  • the grain is fed to a second apparatus for peeling surface treatment of the grain, here a peeler 12; this is related to Fig. 4 and Fig. 5 explained in more detail.
  • a light peeler 4 can alternatively be used if a gentler treatment with less removal of shell material is desired.
  • the fiber fraction leaving the peeler 12 can be sent for further use (not shown).
  • the grain passes another Aspirationskanal 13 and another magnet 14 and is then fed to the grinding process.
  • the Light Peeler 4 is shown in more detail.
  • the grain is supplied to the light peeler 4 via a product inlet 15 and reaches a feed screw 20.
  • the light peeler 4 has a stator 19 and a rotor 25. Between rotor 25 and stator 19 and screen plates 27 (FIG. Fig. 3 ) is formed a processing zone 18 for the grain.
  • the distance between rotor 25 and stator 19 can be reduced above and below by underlaying the segments 41, in order to achieve a more intensive treatment of the process material.
  • the distance of the screen plates 27 to the rotor 25 can also be adjusted; a greater distance is accompanied by a gentler treatment of the process material.
  • the rotor 25 has a hollow shaft 26 which is driven by a motor 23.
  • the hollow shaft has air openings 24, via which air can be supplied in the processing zone 18.
  • the treatment intensity in the processing zone 18 can be regulated by adjusting the back pressure of the grain in the Light Peeler 4. Via the outlet 16, the fiber fraction leaves the light peeler 4; the treated grain leaves the Light Peeler 4 via the outlet 17.
  • Fig. 4 and Fig. 5 the Peeler 12 is shown in more detail. Parts having substantially the same function are designated by the same reference numerals as in the light peeler 4.
  • the cereal is supplied to the peeler 12 via a product inlet 15 and reaches a feed screw 20.
  • the peeler 12 has a stator 19 and a rotor 25. Between rotor 25 and stator 19 and screen plates 27 (FIG. Fig. 5 ) is formed a processing zone 18 for the grain.
  • the distance between rotor 25 and stator 19 can be reduced at the top and bottom by underlaying the segments 41, thus to achieve a more intensive treatment of the process material.
  • the distance of the screen plates 27 to the rotor 25 can also be adjusted; a greater distance is accompanied by a gentler treatment of the process material.
  • the rotor 25 has a hollow shaft 26 which is driven by a motor 23.
  • the hollow shaft has air openings 24, via which air can be supplied by means of a fan 28 in the processing zone 18, whereby the separation of the shell fraction can be facilitated and completed.
  • the treatment intensity in the processing zone 18 can be regulated by adjusting the back pressure of the crop in the peeler 12. Via the outlet 16, the fiber fraction leaves the peeler 12; the treated grain leaves the peeler 12 via the outlet 17.
  • Fig. 6 the vertebrae setter 2 is shown in detail.
  • the cereal is fed to the vortexer 2 via the product inlet 34 and passed through the vortexer in a helical direction (indicated by the arrow line in the interior of the vortexer 2).
  • About a not shown in detail water inlet 2 water is metered supplied to the interior of the vortex network.
  • an upper shaft 30 and a lower shaft 31 are arranged; Paddles 32 and 33 are provided on these rotating shafts in such a geometry and arrangement as to achieve the above described helical conveying movement.
  • the shafts 30 and 31 are driven by a common motor 29.
  • the strained corn leaves the vortex network via the product outlet 35.
  • an indwelling screw conveyor 10 is shown in detail.
  • the grain is fed to the indwelling screw conveyor via a product inlet 36.
  • a shaft 38 is arranged, on which paddle 40 provided in such a geometry and arrangement that a conveying movement is achieved.
  • the grain exits the indwelling screw conveyor via the product outlet 37.
  • the shaft 38 is driven by the motor 39.
  • a net screw conveyor not shown in detail may be designed in an analogous manner, with only one water supply being provided preferably in the front part of the interior in the direction of product flow.
  • the netting was carried out with a Wirbeletzer 2.
  • the surface treatments were carried out with a Peeler 12 (MHXM-W, Bühler AG).
  • the Peeler 12 was always operated with the following settings: Performance product receipt: 3 t / h Speed of the rotor: 335 rpm Screen size: 1.1mm x 12mm Distance rotor to segment 41: 13 mm Distance rotor to sieve: 8 mm

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  • Cereal-Derived Products (AREA)

Claims (11)

  1. Procédé de préparation au broyage de céréales, comprenant les étapes suivantes :
    a) la mise à disposition de céréales ;
    b) éventuellement : le mouillage et le conditionnement des céréales, notamment pendant une durée ≤ 1 heure ;
    c) l'élimination sélective d'une première fraction de constituants d'enveloppe des céréales selon l'étape a) ou des céréales obtenues à l'étape b), cette première fraction comprenant principalement les constituants d'enveloppe extérieurs des céréales mouillées ;
    d) le mouillage et le conditionnement des céréales obtenues à l'étape c) ;
    e) l'élimination sélective d'une seconde fraction de constituants d'enveloppe des céréales obtenues à l'étape d), cette seconde fraction contenant principalement des fibres alimentaires des céréales mouillées ;
    caractérisé en ce qu'à l'étape c), 0,2 à 2 % en poids des céréales sont éliminés.
  2. Procédé selon la revendication 1, caractérisé en ce que les céréales mises à disposition à l'étape a) présentent une teneur en humidité ≥ 14 % en poids.
  3. Procédé selon la revendication 1, caractérisé en ce que les céréales mises à disposition à l'étape a) présentent une teneur en humidité < 14 % en poids.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la seconde fraction éliminée à l'étape e) présente une teneur en fibres alimentaires totales ≥ 60 % en poids.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la seconde fraction éliminée à l'étape e) présente une teneur en amidon ≤ 20 % en poids.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'étape e) est réalisée en plusieurs étapes partielles e1) à en).
  7. Procédé selon la revendication 6, caractérisé en ce que les fractions obtenues aux étapes partielles e1) à en) ou des parties de celles-ci sont mélangées les unes avec les autres de sorte que le mélange présente une teneur en fibres alimentaires totales ≥ 60 % en poids.
  8. Procédé selon la revendication 6 ou 7, caractérisé en ce que les fractions obtenues aux étapes partielles e1) à en) ou des parties de celles-ci sont mélangées les unes avec les autres de sorte que le mélange présente une teneur en amidon ≤ 20 % en poids.
  9. Procédé selon l'une quelconque des revendications 6 à 8, caractérisé en ce qu'un nouveau mouillage et conditionnement des céréales a lieu entre les étapes partielles e1) à en).
  10. Procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le mouillage et le conditionnement à l'étape b) sont réalisés dans un humidificateur fluidisé (2) ; et/ou le mouillage et le conditionnement à l'étape d) sont réalisés dans un transporteur à vis à mouillage et temps de séjour (8, 10).
  11. Procédé selon l'une quelconque des revendications 1 à 10, caractérisé en ce que l'élimination des constituants de la première et/ou de la seconde fraction aux étapes c) et e) à partir du grain des céréales a lieu essentiellement par frottement grain/grain.
EP09164321.3A 2009-07-01 2009-07-01 Procédé de préparation de broyage de céréales Not-in-force EP2269739B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP09164321.3A EP2269739B1 (fr) 2009-07-01 2009-07-01 Procédé de préparation de broyage de céréales
ES09164321.3T ES2563042T3 (es) 2009-07-01 2009-07-01 Procedimiento para el tratamiento previo para la trituración de cereales
EP15194089.7A EP3009191A1 (fr) 2009-07-01 2009-07-01 Utilisation de fibres nutritives obtenues lors d'un procede de preparation de broyage de cereales

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09164321.3A EP2269739B1 (fr) 2009-07-01 2009-07-01 Procédé de préparation de broyage de céréales

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP15194089.7A Division EP3009191A1 (fr) 2009-07-01 2009-07-01 Utilisation de fibres nutritives obtenues lors d'un procede de preparation de broyage de cereales
EP15194089.7A Division-Into EP3009191A1 (fr) 2009-07-01 2009-07-01 Utilisation de fibres nutritives obtenues lors d'un procede de preparation de broyage de cereales

Publications (2)

Publication Number Publication Date
EP2269739A1 EP2269739A1 (fr) 2011-01-05
EP2269739B1 true EP2269739B1 (fr) 2015-12-16

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP15194089.7A Withdrawn EP3009191A1 (fr) 2009-07-01 2009-07-01 Utilisation de fibres nutritives obtenues lors d'un procede de preparation de broyage de cereales
EP09164321.3A Not-in-force EP2269739B1 (fr) 2009-07-01 2009-07-01 Procédé de préparation de broyage de céréales

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP15194089.7A Withdrawn EP3009191A1 (fr) 2009-07-01 2009-07-01 Utilisation de fibres nutritives obtenues lors d'un procede de preparation de broyage de cereales

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EP (2) EP3009191A1 (fr)
ES (1) ES2563042T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011141257A1 (fr) 2010-04-15 2011-11-17 Bühler AG Procédé et dispositif de fabrication de farine
ITBO20120025A1 (it) * 2012-01-20 2013-07-21 Molini Pivetti Societa Per Azioni Impianto e procedimento di decorticazione per l'estrazione di aleurone e prodotto farinaceo ottenuto da tale procedimento.
CN113262834B (zh) * 2021-05-28 2022-08-19 辽宁农丰农业发展集团有限公司 一种大米加工工艺
CN114471802B (zh) * 2022-02-16 2022-09-06 山西农业大学玉米研究所(山西省农业科学院玉米研究所) 一种基于智能自动化的藜麦高效去壳装置及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0810031A2 (fr) * 1996-05-31 1997-12-03 Satake Corporation Procédé de traitement préliminaire lors du broyage de la farine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1164210B (de) 1959-01-05 1964-02-27 Theodore Earle Verfahren zum Entfernen der Epidermis-Schicht von Getreidekoernern
DD123159A2 (fr) * 1975-12-19 1976-12-05
DD142504A1 (de) * 1979-01-04 1980-07-02 Rudolf Tschiersch Universelles verfahren,vorzugsweise zum netzen von brotgetreide und huelsenfruechten
GB9214771D0 (en) * 1992-07-11 1992-08-26 Satake Uk Ltd A process for treating cereal grain prior to milling
DE4345422C2 (de) 1993-08-10 2002-09-12 Buehler Ag Verfahren und Vorrichtung zum Scheuern von Getreide
DE10300295A1 (de) * 2003-01-02 2004-07-15 Bühler AG Verfahren und Anlage zur Reinigung von Getreide

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0810031A2 (fr) * 1996-05-31 1997-12-03 Satake Corporation Procédé de traitement préliminaire lors du broyage de la farine

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Publication number Publication date
EP3009191A1 (fr) 2016-04-20
ES2563042T3 (es) 2016-03-10
EP2269739A1 (fr) 2011-01-05

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