JP6511846B2 - Control method for producing refined white rice - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a method for controlling rice grain quality for producing functional white rice, and in particular, whether or not selection of raw material brown rice is eligible and whether rice grain processing conditions are qualified before the full-scale rice grain refining is performed. The present invention relates to a method for managing spermatability, which can check whether the quality of finished functional white rice is eligible or not at the stage where the inspection is finished.

  Germ rice is a rice refined to leave germs adhering to brown rice as much as possible, and is richer in nutrients and physiologically functional components than ordinary polished rice, and easier to eat than cooking and eating brown rice It has the advantage of being easy to digest. Embryonic rice can be said to be rice that pursues the deliciousness of white rice without losing the nutritional value of brown rice.

  By the way, the above-mentioned embryo rice has a quality standard, and its definition is "rice which is milled with 80% or more of embryo left." And it is possible to display what satisfy | filled this standard as "embryo rice", and circulation in a market is also recognized. On the other hand, in recent years, it has been refined to high whiteness so as not to be comparable to ordinary polished rice, and some of them are distributed with extremely high whiteness by processing without washing after milling.

  For example, a method for producing embryo rice described in Patent Document 1 is known as a method for realizing the above-described method for increasing the embryo retention rate of embryo rice and improving the degree of milling. This machine grinds the surface of brown rice and peels the layer on the surface of brown rice by grinding and milling repeatedly several times to produce grinding and polishing rice, and removes adhering grime on the surface of grinding and milling rice Grinding mechanism that grinds the surface of grinding and milling rice is processed by polishing rice processing to produce milled rice, and wet grinding and non-washing treatment to dry and dry further after milling grinding rice with water to produce germ polished rice It is a method that comprises a washing treatment mechanism, and that the germ retention rate of germ milled rice is 85% or more and the milling degree of germ milled rice is 38% or more.

  As a result, since the grinding and milling process is repeated several times by the grinding and milling mechanism, lowering the pressure applied to the brown rice during the grinding and milling process reduces the brown rice a little while suppressing the lowering of the germ retention rate of the brown rice. There is an effect that it is possible to carry out grinding and milling sufficiently.

  As described above, lowering the pressure applied to brown rice in the grinding and milling process suppresses the lowering of the embryo retention rate and is one method for facilitating the production of embryo rice in which the embryo remains at 80% or more. However, it is also an option to select raw material brown rice as another factor to make it easy to produce embryo rice by suppressing the decrease in embryo retention rate.

  That is, it is known that germs adhering to brown rice are significantly different in ease of taking the germ depending on the varieties of raw material brown rice (see, for example, Non-Patent Document 1).

  According to Non-patent Document 1, "If we try to whiten rice to improve the taste, naturally, the embryo retention rate decreases and the nutritional value decreases. Therefore, varieties in which embryos tend to remain have been conventionally selected. , Kiyonishi Shiki, Sasaniki Shiki, Sasaminoki, Mushiho Ho, Mushikari, Hatsushimo, Hinohikari etc. However, even with these appropriate varieties, it is necessary to increase the degree of milling to 34% or more if the embryo possession rate is secured to 80%. On the other hand, the cultivation of good-tasting rice such as Koshihikari and Akitakomachi has expanded, the proper varieties of germ rice have declined, and raw rice has run short, which has become a bottleneck in the production and sales expansion of germ rice. There is a statement that "it is."

  However, the above-mentioned statement that "easiness of taking off embryos differs depending on the variety of rice" is only knowledge that farmers and rice mill operators know only empirically. In other words, when rice varieties newly appeared or when the operator of the rice mill does not know that embryos can be easily obtained depending on the varieties, it is not possible to properly manage the quality control.

JP 2008-93550 A

Haruaki Gomei, "All of germ rice", [online], Women's Nutrition University, [search on February 9, 2015], Internet <URL: http://www.eiyo.ac.jp/haigamai/>

  In the present invention, in view of the above problems, it is checked whether the selection of raw material brown rice is eligible and whether the processing conditions are qualified before completion of the full-scale milling, and the completion of the milling is completed. It is an object of the present invention to provide a method for managing grain quality that can check whether the quality of functional white rice is appropriate or not.

In order to solve the above problems, the present invention comprises the steps of: preparing a brown rice sample for performing pre-cooking before performing full-fledding semen; measuring whiteness of the brown rice sample; and pre-refining the brown rice sample Measuring whiteness of the polished rice sample after milling, measuring the number of residual embryos of the polished rice sample after preliminary milling, and the whiteness value obtained in the whiteness measuring step. And a step of determining from the numerical value obtained by measuring the number of residual embryos that the raw material is a suitable raw brown rice for rice bran.

  Moreover, the process of selecting the raw material brown rice suitable for rice bran and starting full-scale rice flour, the process of setting the target whiteness with the start of the full-scale rice flour, and the whiteness calculated at the time of the precoarse rice flour The method further comprises the steps of performing the fine adjustment of the set target whiteness based on the value and the number of residual embryos, and performing the fine adjustment of the load of the rice milling machine after starting full-scale milling.

  Furthermore, it is characterized in that, after completion of full-fledged spermatid analysis, any of the whiteness of the fine product, moisture, residual germ, water-soaked grains and adhesion rate of sputum are examined.

According to the present invention, in the full-scale pre-sewing stage, prior to pre-sewing, pre-sewing is performed, and according to the whiteness value of the polished rice sample after pre-sewing and the number of residual germs, a suitable raw material Since it is judged whether it is brown rice or not, even if it is not known that there is an ease of taking off germ depending on the kind of rice grain, there is an advantage that raw rice suitable for grazing can be selected to perform proper milling management. There is .

  Then, after the start of full-fledged harvest, fine adjustment of the target whiteness is performed, and furthermore, the load of the rice milling machine after the full-fledged drop-off is fine-adjusted. It is possible to carry out the management.

  Furthermore, after completion of the full-fledged harvest, one of the whiteness of the fines, moisture, residual germ, water-soaked grains and adhesion rate of the reeds will be checked, so shipment of functional white rice that does not meet the criteria will be halted and quality There is an advantage that thorough management and distribution of only functional white rice that meets the standard can be distributed to the market.

It is a flow chart which shows a moxibustion management method for manufacturing functional white rice of the present invention embodiment. It is a flowchart which shows the raw material selection check process of FIG. It is a flowchart which shows the check process at the time of the rice cake processing of FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic longitudinal cross-sectional view of a special purpose rice milling machine for carrying out the rice grain refinement processing of functional white rice. It is a block diagram which shows the control structure of a dedicated rice milling machine. It is a flowchart which shows the pre-shipment quality check process of FIG. It is a correlation figure with the test rice polishing machine and the full-scale rice milling machine of the ease of taking off the germ with respect to whiteness rise. It is a histogram of whiteness distribution for every sample single grain in a special-purpose rice milling machine and a general rice milling machine. It is a histogram of the whiteness distribution for every single grain of brown rice, the first machine precision goods, the second machine precision goods, and the third machine precision goods when refined with a special rice milling machine.

First, define the terms. As described above, embryo rice is "rice that is milled with 80% or more of embryo left," that is, rice whose embryo residual rate is 80% or more (whiteness is approximately 34% or more). It is done. It has long been known as rice that retains nutritional value better than refined rice by leaving germ. However, the taste and texture at the time of cooking are not comparable to those of polished rice, and it is difficult to penetrate people in normal eating habits.
On the other hand, functional white rice described in the embodiment of the present invention properly selects varieties of brown rice as a raw material, and secures 60% or more of a sprouting trace of an embryo part by processing rice bran. It refers to rice that has been refined. Due to such a processing of rice bran, it contains more potassium, magnesium, phosphorus and zinc as inorganic components as compared with ordinary polished rice, and vitamin B1 (thiamine), vitamin B6 and vitamin E (α-tocopherol) as functional components. It is finished in white rice containing a lot of

FIG. 1 is a flow chart showing a method of managing grain refining for producing functional white rice according to an embodiment of the present invention. As shown in FIG. 1, in the pre-full-fledged septic management method according to the embodiment of the present invention, a raw material selection check step S001 for selecting whether or not the selection of the raw material brown rice is eligible, and Three check processes of the check processing process S002 for determining whether the rice milling conditions are appropriate and the pre-shipment check process S003 for determining whether the quality of the finished functional white rice is appropriate when the processing is finished. , And only when all of these three check steps are completed will be shipped S004.
Further, immediately after each check step, return steps S 005, S 006 and S 007 are provided to re-execute each check step again when there is a defect in the check step. It can be implemented in

  FIG. 2 is a flowchart showing the raw material selection check step S001 of FIG. The method of selecting the raw material will be described in detail with reference to FIG.

  First, a plurality of brown rice samples are prepared (S010 in FIG. 2) before the full-scale milling is performed, and the whiteness of the brown rice sample is measured (S011 in FIG. 2). The whiteness of the brown rice sample was measured, for example, with a brown rice / milled rice whiteness meter C-600 manufactured by Kett Co., Ltd. Next, about 10 g of a brown rice sample is taken and put into a test rice milling machine to perform test rice milling (S012 in FIG. 2). As a test rice polishing machine, for example, a small-sized rice mill "Parest" manufactured by Kett Co., Ltd. was used, and the milling time was 20 seconds. Then, the sample is taken out from the test rice polishing machine and the whiteness of the polished rice is measured (S013 in FIG. 2). The whiteness of polished rice was measured using a brown rice-milled whiteness meter C-600 manufactured by Kett Co., as described above. After the whiteness measurement, in order to measure the whiteness distribution for each single grain of the sample, and the average whiteness and the standard deviation, a histogram is created and each value is calculated (S014 in FIG. 2).

Next, 100 rice grains are transferred to a carton or the like for the post-sparing sample, and using tweezers and a magnifying glass, it is determined how many residual germ rice grains are out of 100 rice grains (FIG. 2 S015). Then, when the whiteness value and the numerical value of the residual embryo are obtained, the value is substituted into the following suitability determination formula set in advance, and the SO value (the assumed residual embryo) is derived (S016 in FIG. 2).

  The SO value (estimated residual germ) means the whiteness increase value from desired brown rice when performing full-scale milling, the whiteness increase value (measured value) from the brown rice obtained by the test rice polishing machine, and the above It is a function to be obtained from the number (measured value) of residual embryos of a sample after rice polishing obtained by the test rice milling machine.

  And as an index of this SO value (the assumed residual germ), it may be considered that it is the same kind as the definition “the rice which is milled with 80% or more of the germ left” of the above-mentioned germ rice, functional white rice of this embodiment In the case of, it is good to apply as "the rice which is milled leaving 60% or more of germ" as a definition. That is, since functional white rice of this embodiment is not a thing with a high remnant standard like germ rice, taste and texture become very close to polished rice.

  In the flowchart of FIG. 2, in S017, it is determined whether the SO value (expected residual germ) is 60 or more. At this time, if the SO value is 60 or more, the embryo adheres to some extent and the nutritive value is high, but the taste and texture are similar to polished rice, and thus it can be suitable as a raw material for full-fledged semen (Figure 2 S018). On the other hand, if the SO value is less than 60, the process returns to S010 and the material selection will be performed again.

  FIG. 3 is a flow chart showing the checking step S002 at the time of milling processing of FIG. 1, and FIG. 4 is a schematic longitudinal sectional view of a special-purpose rice milling machine for performing milling processing of functional white rice. First, the structure of the special-purpose rice milling machine will be described with reference to FIG.

As shown in FIG. 4, the dedicated rice milling machine 1 has a configuration in which the horizontal axis type rice milling machines are stacked in multiple stages on the gantry 2, and there is no first machine 3, second machine 4 and third machine 5 from the top. ing. Since the first to third units 3 to 5 have substantially the same configuration, the first unit 3 will be mainly described.
The first machine 3 is provided with a cylindrical fine mesh wire mesh 6 and a whitening roll 8 attached to the main shaft 7 and rotatably disposed in the fine carbon wire mesh 6, and the fine silver mesh wire 6 and the whitening roll 8 The processing chamber 9 is formed between the processing unit 10 and the processing unit 10. In the processing unit 10, the raw material supply unit 11 is provided on one end side of the processing unit 9, and the rice grain discharging unit 12 is provided on the other end side. The raw material supply unit 11 includes a raw material supply cylinder 14 having a raw material supply port 13 and a raw material hopper 15 disposed in the raw material supply port 13. Further, in the raw material supply cylinder 14, a spiral roll 16 mounted on the main shaft 7 and rotationally driven is disposed.

The rice grain discharge unit 12 has a cylindrical rice grain discharge cylinder 18 having a rice grain discharge port 17 and a rice grain discharge weir 19 disposed at an outer position corresponding to the rice grain discharge port 17. Further, the rice grain discharge crucible 19 is provided with a resistance lid (pressure plate) 21 which is biased by a resistance weight (weight) 20 and closes the rice grain discharge port 17.
The milling roll 8 is provided with projections 22 for milling corresponding to the position of the milling chamber 9, and projections 23 for discharging rice grain corresponding to the position of the rice grain discharge cylinder.
The whitening roll 8 is mounted in the hollow portion of the main shaft 7. A plurality of jet holes 24 are formed in the hollow portion of the main shaft 7, and a blower fan 25 communicating with the hollow portion is connected to one end side of the main shaft 7.
Connected to the other end of the main shaft 7 is a driven pulley 26 connected by a drive pulley (not shown) of a drive motor (not shown) and a belt (not shown).
A collecting chamber 27 is formed around the processing chamber 9, and the collecting chamber 27 communicates with a collecting duct 28 provided below. In addition, a residual rice removing air nozzle 29 is disposed at one end side of the processing chamber 9 and below the raw material supply cylinder 14.
With regard to the configuration of the rice grain discharge unit 12, the second grain machine 4 and the third grain machine 5 similarly have the rice grain discharge openings 17b and 17c, the rice grain discharge troughs 19b and 19c, the resistance weights (weights) 20b and 20c, and the resistance lid, respectively. (Pressing plates) 21b and 21c are provided. In the vicinity of the gantry 2 of the third unit 5, there is provided a fines discharge bin 30 for discharging the final fines. Note that, for example, a rotatable rotary valve 31 as a raw material flow rate control unit is provided above the raw material hopper 15, and it is possible to adjust the raw material flow rate by controlling the rotational speed. As the other raw material flow rate control means, an appropriate one such as a shutter or a cut gate can be adopted.
The dedicated rice milling machine 1 of this embodiment has a control configuration as shown in FIG. That is, the control unit 32 includes a central processing unit (CPU) 33, a first storage medium (RAM) 34 capable of reading and writing data as a work area of the CPU 33, a basic milling pattern executed by the CPU 33, etc. The second storage medium (ROM) 35 for recording the information, and the operator of the rice milling plant, operate the keyboard etc. and relates to the quality of rice such as the type, flow rate, whiteness, milling pattern and motor load after selection of raw materials The rotary valve motor 38, the first machine motor 39, the second machine motor 40 and the third machine are connected to the input device 36 for inputting certain items, the display 37 such as a display, and the central processing unit (CPU) 33. It comprises a number machine motor 41 and the like. As a result, the various motors 38, 39, 40 and 41 are controlled to be optimum values in accordance with various values input by the input device 36 and the milled rice pattern read out from the ROM 35.

Next, with reference to FIG. 3, a check method at the time of milling and refining will be described. First, the operator of the rice milling plant starts the dedicated rice milling machine 1 so as to obtain a standard milling pattern (S020 in FIG. 3), and then the target whiteness of the raw material brown rice selected by the method of selecting the raw material in FIG. Setting (S021 in FIG. 3). Then, based on the SO value calculated by the raw material selection method, the target whiteness is finely adjusted (S022 in FIG. 3). This fine adjustment may be determined as shown in Table 1 below, for example, on the basis of the SO value.

After the target whiteness is determined, load adjustment of the motor from the first machine to the third machine is performed (S023 in FIG. 3). In this load adjustment, in the case of a standard milling pattern, motor loads from the first machine to the third machine are evenly distributed. Then, when the target whiteness is set, for example, the load adjustment as shown in Table 2 below is performed.

  As for adjustment of the motor load, the drive motor of the first machine adopts 15 Kw, the drive motor of the second machine adopts 18.5 Kw, and the drive motor of the third machine adopts the output of 15 Kw (the second The power of the aircraft is the largest), it is good to adjust the power distribution centering on the second machine.

  Next, visually confirm the fines discharged from the third machine (S024 in FIG. 3), and compare the sample sample and fines as the target whiteness, and the brow streaks on the back side of the rice grain are removed and normal It is confirmed whether or not the treatment is performed, and whether or not the remaining amount of embryo is large (S025 in FIG. 3).

  As a result of visual observation, if it is judged that the pupa muscle has been removed and it is judged that normal punctuality has not been performed, adjustment is made in the direction of increasing whiteness, and adjustment is made in the direction of decreasing whiteness if there is little residual embryo Set the whiteness again as you want. At this time, check the fine samples discharged from the first machine, the fine samples discharged from the second machine and the raw material brown rice sample at the same time, and set the whiteness again while tracing back the cause of each rice milling machine (S026 in FIG. 3).

  FIG. 6 is a flow chart showing the pre-shipment quality check step S003 of FIG. The method of pre-shipment quality check will be described in detail with reference to FIG.

  The pre-shipment quality check process performs a final check of whiteness (S030 in FIG. 6). The whiteness measurement may be performed using, for example, a brown rice-milled rice whiteness meter C-600 manufactured by Kett Co., as described above. Next, it is checked whether the water content is 15.0% (preferably in the range of 14.0 to 15.0%) or less (S031 in FIG. 6). The moisture measurement may be performed, for example, with a moisture meter PB-1D manufactured by Kett Co., Ltd. Subsequently, it is checked whether or not the residual embryo is 60% or more (S032 in FIG. 6). Furthermore, it is checked whether or not the water soak fraction is 10% or less (S033 in FIG. 6). The water soak split grains are used to see the degree of cracks when rice grain is soaked in water, and if this value is abnormally high, some parts become rice balls during rice cooking, or become rice that breaks out after boiling. Needs to be checked.

  To check the water soak split, first add 50 cc of water to black carton (water temperature 15 ° C), add 100 or more sample rice grains to this black carton, and then normal grain (grain size) in water Count 100 tablets. Then, after soaking for 20 minutes, cracked rice grains are counted and the ratio is taken out.

Finally, a check is made as to whether or not the adhesion rate of the spine of rice grain on the dorsal side is 2% or less (S 034 in FIG. 6). It is preferable to count the number of grains using a grain discriminator RGQI10A manufactured by Satake Co., Ltd. and visually calculate whether or not the adhesion rate of the brow muscle is 2% or less.
If the conditions of the check items S030 to S034 are not satisfied, the process returns to the check in FIGS. 2 and 3 (S035 in FIG. 6).

  As described above, according to the embodiment of the present invention, whether or not the raw material selection check step of selecting whether the selection of the raw material brown rice is eligible or not and the milling conditions at the time of the coarse processing are appropriate Because there are three check processes, one is the check process at the time of processing rice cake processing to determine whether or not, and the step before shipping check to determine whether the quality of the finished functional white rice is qualified at the stage when the rice cake processing is finished. Even if it is not known that the rice cultivar has ease of germ removal, there is an advantage that it is possible to carry out a proper control over all processes.

  Regarding the raw material selection check process of FIG. 2, the SO value (expected residual germ) was derived, and a confirmation test was performed to determine whether the compatibility determination formula has significance.

Prepare 12 types (variety) of brown rice samples as raw materials,
1. Whether the whiteness rise from the brown rice by the test rice milling machine and the whiteness rise from the brown rice by the full-scale rice milling machine can be seen to be correlated.
2. Whether there is a correlation between the test rice milling machine and the full-fledged rice milling machine with regard to the ease of taking the germ for whitening elevation.
Each was verified.

The test rice milling machine used a small-sized rice mill "Perrest" manufactured by Kett Co., Ltd., and the milling time was 20 seconds. The full-scale rice milling machine is a horizontal axis triplex dedicated milling machine shown in FIG. The results are shown in Table 3 below. Further, FIG. 7 shows the correlation between the test rice milling machine and the full-scale rice milling machine.

  From the above Table 3 and FIG. 7, focusing on the whiteness rise and germ-free grains, it was found that the correlation between the test rice milling machine and the full-fledged rice milling machine is correlated except for some varieties. Moreover, it turned out that the formula (Formula 1) of RO value can be derived from the result of a test rice polishing machine.

  Figure 8: Whiteness distribution for each single grain of the sample, average whiteness with a special rice milling machine (Figure 4) and a general rice milling machine (commercial friction type rice milling machine, Millmore model number HPR 25A made by Satake Co., Ltd.) And histograms were prepared to measure the standard deviation.

  Referring to FIG. 8, it can be seen that the broken line of the general rice milling machine is biased in the direction of higher whiteness than the broken line of the dedicated rice milling machine. That is, it is considered that the functional component is lost as wrinkles because the whiteness is high. Therefore, by performing milling with a special-purpose rice milling machine, functional white rice having more inorganic components and functional components can be produced as compared with ordinary polished rice.

  Figure 9 shows the raw brown rice sample when refined with a special-purpose rice milling machine, the fine grain sample discharged from the first machine, the fine grain sample discharged from the second machine, and the single grain of the fine grain sample discharged from the third machine Comparison of the whiteness distribution of

  Referring to FIG. 9, the peaks of the histograms of the raw material brown rice, the first machine sample, the second machine sample, and the third machine sample are drawn in ascending order of whiteness. And it turns out that the shape of the mountain is also changing from a low mountain to a steep mountain. That is, it is understood that as the first machine, the second machine and the third machine progress, the variation in whiteness is suppressed and almost all the rice grains are approaching the target whiteness.

  The grain refining management method of the present invention can be applied in the field of rice processing.

DESCRIPTION OF SYMBOLS 1 dedicated rice milling machine 2 gantry 3 first machine 4 second machine 5 third machine 6 screen 7 screen 8 spindle 8 screen white roll 9 screen processing section 10 screen processing section 11 raw material supply section 12 rice grain discharge section 13 raw material supply port 14 raw material supply cylinder 15 raw material Hopper 16 Spiral roll 17 Rice grain discharge port 18 Rice grain discharge cylinder 19 Rice grain discharge bowl 20 Resistance weight (weight)
21 Resistive lid (pressure plate)
22 Projection for rice milling 23 Projection for rice grain ejection 24 Spray hole 25 Blowing fan 26 Followed pulley 27 Gathering chamber 28 Gathering duct 28 Air nozzle for residual rice removal 30 Fine discharge valve 31 Rotary valve 32 Control part 33 Central processing unit ( CPU)
34 1st storage medium (RAM)
35 second storage medium (ROM)
36 input device 37 display device 38 rotary valve motor 39 first machine motor 40 second machine motor 41 third machine motor

Claims (4)

A step of preparing a brown rice sample for performing pre-cooking before performing full-fledding, a step of measuring whiteness of the brown rice sample, a step of pre-refining the brown rice sample, and a step of pre-refining the polished rice sample Obtained by measuring whiteness, measuring the number of residual germs of the polished rice sample after the pre- sparing, and measuring the whiteness value obtained in the step of measuring the whiteness and the number of the residual germs And a step of determining that the raw material is a suitable raw material brown rice for rice bran based on the numerical values described above. The method for controlling rice grain quality for producing functional white rice according to claim 1, wherein the step of determining that the raw material brown rice is suitable for the rice grain seeding is the whiteness value obtained in the step of the whiteness measurement and the whiteness value. Functional white rice characterized by substituting the numerical value obtained by measurement of the number of residual embryos into the following general formula and determining that it is a raw material brown rice suitable for rice bran if the obtained numerical value is a predetermined value or more. Management method for manufacturing.

  3. A method for managing functional malted rice according to claim 1 or 2, wherein a raw material brown rice suitable for said raw soybean flour is selected to start full-fledged seining, and a target along with the start of said full-fledged malted rice. A step of setting whiteness, a step of performing fine adjustment of the set target whiteness based on the whiteness value calculated at the time of the preliminary kneading and the number of residual embryos A step of finely adjusting the load of the rice milling machine after the step of preparing the functional refined rice for producing functional white rice. The method for controlling the quality of refined rice for producing functional white rice according to claim 3, wherein, after completion of said full-scale milling, examination of any of whiteness, moisture, residual germ, water soak split grains and adhering rate of fines of refined product A method of managing sperm for producing functional white rice characterized by performing.

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