CN109287746A - A method of using moistening, rough quenched inhibition rice bran is rancid - Google Patents
A method of using moistening, rough quenched inhibition rice bran is rancid Download PDFInfo
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- CN109287746A CN109287746A CN201811366807.1A CN201811366807A CN109287746A CN 109287746 A CN109287746 A CN 109287746A CN 201811366807 A CN201811366807 A CN 201811366807A CN 109287746 A CN109287746 A CN 109287746A
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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
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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
- B02B5/00—Grain treatment not otherwise provided for
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Abstract
A method of using moistening, rough quenched inhibition rice bran is rancid, including the processing steps such as husking, the rough quenched and husk rice of profit.During moistening rough quenched, atomizing-dampening system is successively carried out to fresh brown rice using citric acid/malic acid solution, L-Methionine/L-cysteine solution, ferulic acid/tea polyphenols solution, the fat hydrolase and lipoxidase being passivated in brown rice, and free radical is quenched, inhibit rice bran that lipid hydrolysis and lipid oxidation reaction occurs.The method of the present invention treated fresh rice bran free fatty acid content≤1%, after fresh rice bran stores 30 d at room temperature, free fatty acid content≤1.5%.The rancid of rice bran not only can be effectively suppressed in the present invention, extend rice bran can waiting time, the food-grade processing aid of use have the function of sterilize and chelate heavy metal, be also particularly suitable for preparing the higher product of the economic values such as clean rice, nutrient enhancing rice.
Description
Technical field
The present invention relates to grain processing production technical fields, and in particular to a kind of rancid using rough quenched inhibition rice bran is moistened
Method.
Background technique
Rice bran is most important one kind by-product, pericarp layer, seed coat layer, aleurone including paddy seed in paddy processing
With part albuminous cell etc., although only accounting for the 6%~8% of paddy quality, 64% rice nutrient and 90% or more has been concentrated
Human essential elements have the function of to adjust blood glucose, prevention cardiovascular and cerebrovascular disease, antifatigue, anti-oxidant, pre- preventing tumor etc..
China is the maximum eating rice production state in the whole world, and rice yield is up to 200,000,000 tons or so, nearly 14,000,000 tons of rice bran annual output.
China's rice bran resource is sure to occupy first place in the world, but fresh rice bran saves improper easily rancid rotten feature and limits the utilization of rice bran
And product development.Contain 14~24% lipids in fresh rice bran, wherein about 42% oleic acid and 38% linoleic acid, while also containing fat
A variety of enzymes such as hydrolase, lipoxygenase, peroxidase.In rice bran storage and process, fat hydrolase can be quick
Hydrolyze lipid forms the free polyunsaturated fatty acid such as linoleic acid, so that rice bran acid value quickly increases within short several hours
Add；The linoleic acid of separate out and lipid hydroperoxidation can be formed under lipoxidase enzyme effect containing linoleic aliphatic ester
Object；Lipid hydroperoxide forms free radical and volatile carbonyl compound by autoxidation or enzymatic catalysis.Just go out machine
Fresh rice bran free fatty acid content is just up to 1% or more at 25 DEG C, and after fresh rice bran is stored one month, free-fat
Acid content can increase to 60%~70% from 3%.And when Rice bran crude oil content of fatty acid reaches 10% or more, refining is also uneconomical,
Livestock and poultry indigestion can be caused being used as feed, influences growth and development.
Currently, carrying out the most common method of stabilization processes to rice bran has extrusion, wet heating and acid adding deactivation method.But this
A little methods are often both for the fresh rice bran obtained after husk rice.However, in rice milling process, when lipase is contacted with grease one
Just occur immediately reaction, especially lipid oxidation reacts, once induce, after enzyme deactivation can autoxidation, lead to grease not
Break rancid rotten.
101301006 B of CN discloses a kind of method of processing husked rice and stabilizing rice bran by microwave, after to separation husk
Brown rice carries out microwave treatment, obtains that ppl event degree is low or the brown rice without enzyme activity.But this method needs in addition to increase micro-
Wave processing equipment, equipment investment is big, high production cost, and the rice processing enterprises in 50% or more China are day to handle paddy ability
Less than the small business of 100 t, thus it is unfavorable for production practices.
105053757 A of CN discloses a kind of rice bran stabilization processing method, and step includes: the first of adjusting fresh rice bran
Beginning moisture is to 18~25%(mass ratio), it is 3~6 cm that rice bran, which is paved to thickness of feed layer, and carries out microwave treatment, described micro-
The microwave power of wave processing is 550~620 W, and the microwave time is 85~110 s；It takes out and is cooled to room temperature after the completion of processing,
Oxygen storage is protected from light after packaging.The processing method needs to carry out microwave treatment, and energy consumption is high, at high cost.
102715384 A of CN discloses a kind of integrated conduct method of feeding keeping rice bran fresh, first to 1~3 h after husk rice
Within fresh rice bran in add the dedicated regulating acid agent of feed, adjust the pH value of rice bran to 5.0 hereinafter, adjusting the water of rice bran simultaneously
Divide to after 10%~13%, carries out the granulation of wet process extruding, feeding rice bran is made.The regulating acid agent treatment effect that the processing method uses
There are uncertainty, product purpose also only limits feeding.
Simultaneously as the safe storage moisture of paddy (brown rice) has to be lower than 14%, and the moisture content of optimum husk rice processing
But 15%~16%.Therefore, for storage after paddy or milling characteristic of brown rice processing before, it is necessary to carry out moisture conditioning.
There are many current treated defatted rice bran nutrition loss, and the holding time is short, and palatability is poor, and the work of lipase
Property is strong, and it is rancid to easily cause rice bran fats.
Summary of the invention
The technical problem to be solved by the present invention is to overcome drawbacks described above of the existing technology, provide a kind of method letter
It is single, easily controllable, it can be effectively controlled the rancid speed of rice bran, extend the rancid using rough quenched inhibition rice bran is moistened of rice bran storage time
Method.
The technical solution adopted by the present invention to solve the technical problems is as follows: a kind of rancid using rough quenched inhibition rice bran is moistened
Method, comprising the following steps:
(1) husking impurity elimination: being taken off paddy glume using hulling machine, then will not by the brown rice input grain separating machine after shelling
The paddy of shelling removes, and obtains fresh brown rice；
(2) moisten rough quenched: the resulting fresh brown rice input brown rice quality controlling machine progress of step (1) is quenched for the first time, by citric acid
The mixed solution of solution or malic acid solution or citric acid and malic acid is atomized, and is uniformly sprayed on brown rice, completes first
It is secondary quenched；Will it is quenched for the first time after brown rice input again brown rice quality controlling machine carry out it is second quenched, by L-Methionine solution or
L-cysteine solution or L-Methionine and the mixed solution of L-cysteine are atomized, and are uniformly sprayed on brown rice, then
Brown rice is inputted into brown rice storehouse, is stood, is completed quenched for the second time；Will second it is quenched after brown rice input again brown rice quality controlling machine into
Row third time is quenched, the mixed solution of asafoetide acid solution or tea polyphenols solution or ferulic acid and tea polyphenols is atomized, uniformly
It is sprayed on brown rice, brown rice is then inputted into brown rice storehouse, stand, it is quenched to complete third time；
(3) husk rice separates: will carry out husk rice in the brown rice input rice mill in step (2) after quenched three times, obtains rice
And fresh rice bran.
Further, in step (1), 3~5 t/h of mass flow of hulling machine, poor 2.1~2.9 m/s of linear speed, roll gap pressure
0.10~0.12 MPa；3~5 t/h of mass flow of grain separating machine, 295~300 r/min of speed of crankshaft.
Further, quenched for the first time in step (2), the mass flow of brown rice quality controlling machine is 3~5 t/h, amount of water 10
~20 L/h, air pressure are 0.3~0.4 MPa, and the time of repose behind brown rice input brown rice storehouse is 20~30 min.
Further, in step (2), second quenched, and the mass flow of brown rice quality controlling machine is 3~5 t/h, amount of water 24
~30 L/h, air pressure are 0.4~0.5 MPa, and the time of repose behind brown rice input brown rice storehouse is 20~30 min.
Further, in step (2), third time is quenched, and the mass flow of brown rice quality controlling machine is 3~5 t/h, amount of water 26
~28 L/h, air pressure are 0.4~0.5 MPa, and the time of repose behind brown rice input brown rice storehouse is 30~60 min.
Further, in step (3), the mass flow in rice mill is 3~5 t/h, and air quantity is 32~48 m3/ min, it is quiet
Pressure is -100~-120 mmAq, in triplicate.
Further, in step (2), citric acid solution used quenched for the first time or malic acid solution or citric acid and malic acid
Mixed solution preparation method: be first configured to the solution of 2 mol/L, then the solution of 2 mol/L be added drop-wise in pure water,
It is measured during dropwise addition with pH meter, until being formulated as the solution of pH 3.2~3.6.
For the mixed solution of citric acid and malic acid, two kinds of sour proportions are unlimited.
Further, in step (2), second quenched L-Methionine solution used or L-cysteine solution or L-Methionine
Concentration with the mixed solution of L-cysteine is 16~20 mmol/L.
Further, in step (2), the quenched asafoetide acid solution used of third time or tea polyphenols solution or ferulic acid and tea polyphenols
Mixed solution concentration be 0.1~0.2 g/L.
Studies have shown that the method for the present invention selects citric acid, malic acid solution to carry out atomizing-dampening system, carry out moistening rough processing, it can
To be passivated fat hydrolase, citric acid, malic acid simultaneously have the function of sterilizing and chelating heavy metal；Using L-Methionine/L- half
Cystine solution carries out the secondary rough processing of profit, is denaturalized lipoxygenase moderately, citric acid/malic acid is allowed to be able to enter fat
The activated centre of oxygenase further chelates confactor iron ion, is passivated lipoxygenase, then use ferulic acid/tea polyphenols
Solution is moistened rough processing three times, and free radical is quenched, and blocks the Auto-oxidation reaction that may occur；Finally, to rough after quenched
Meter Jin Hang essence is ground to get the fresh rice bran low to the high rice of head rice rate and rancid degree.
Preferred embodiment, first passes through the suitable roll gap pressure of selection and linear speed is poor, reach shelling effect (husking yield 80% with
On) while, the integrality of brown rice can be kept as much as possible；Then the complete fresh brown rice filtered out is first used into pH
3.2~3.6 citric acid/malic acid solution carries out atomizing-dampening system and the short time moistens rough processing, can preferably be passivated fatty water
Solve enzyme；L-Methionine/L-cysteine solution of 16~20 mmol/L is selected to carry out the secondary rough processing of profit, being more advantageous to makes rouge
Fat oxygenase is moderately denaturalized, and allows citric acid/malic acid that can more can smoothly enter into the activated centre of lipoxygenase, chelating auxiliary
Factor iron ion is passivated lipoxygenase；Ferulic acid/tea polyphenols solution of 0.1~0.2 g/L is selected to be moistened rough place three times
Free radical can be more effectively quenched in reason, block the Auto-oxidation reaction that may occur；And pass through the suitable air quantity of selection and quiet
Parameter is pressed, the brown rice progress three after quenched is gently ground, is conducive to obtain the higher rice of head rice rate and rancid degree is low, it can
The longer rice bran of waiting time.
Free fatty acid content≤1% in products obtained therefrom fresh rice bran of the present invention, fresh rice bran store 30 d at room temperature
Afterwards, free fatty acid content≤1.5%.The rancid of rice bran not only can be effectively suppressed in the present invention, and extend rice bran can waiting time；
It is also particularly suitable for preparing the higher product of the economic values such as clean rice, nutrient enhancing rice.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
Chemical reagent used in the embodiment of the present invention is obtained by routine business approach unless otherwise specified.
Embodiment 1
The present embodiment, specific steps are as follows:
(1) husking cleans: using hulling machine to take off paddy (kind praises early 17 in, moisture content 13.0%) glume, material stream
3 t/h, linear speed poor 2.1 m/s, 0.10 Mpa of roll gap pressure are measured, then will not take off the brown rice input grain separating machine after shelling
The paddy of shell removes, and 3 t/h of mass flow, 295 r/min of speed of crankshaft obtain fresh brown rice；
(2) moisten rough quenched: first preparing the citric acid solution of pH 3.2, the resulting fresh brown rice of step (1) is inputted into brown rice condition
Machine, and citric acid/malic acid solution is atomized, it is uniformly sprayed on brown rice, 3 t/h of mass flow, 10 L/h of amount of water,
Then brown rice is inputted brown rice storehouse by 0.3 MPa of air pressure, stand 20 min, is carried out primary quenched.Compound concentration is 16 mmol/ again
Primary quenched brown rice is inputted brown rice quality controlling machine again, and L-Methionine solution is atomized by the L-Methionine solution of L,
It is uniformly sprayed on brown rice, 3 t/h of mass flow, 24 L/h of amount of water, 0.4 MPa of air pressure, brown rice is then inputted into brown rice storehouse,
20 min are stood, are carried out secondary quenched.Compound concentration is the asafoetide acid solution of 0.1 g/L again, again by secondary quenched brown rice
Brown rice quality controlling machine is inputted, and asafoetide acid solution is atomized, is uniformly sprayed on brown rice, 3 t/h of mass flow, amount of water 26
Then brown rice is inputted brown rice storehouse by L/h, 0.4 MPa of air pressure, stand 30 min, is carried out quenched three times；
(3) husk rice separates: quenched brown rice obtained in step (2) is inputted in rice mill and carries out husk rice, 3 t/h of mass flow,
32 m of air quantity3/ min, static pressure -100 mmAq, such Qing Nian tri- obtain rice and fresh rice bran.
Fresh rice bran and the measuring method for storing free fatty acid content in the rice bran after 30 d at room temperature are as follows:
0.5 g of rice bran is weighed, 10 mL n-hexanes, oscillation extraction are added, 4000 r/min are centrifuged 10 min.6 mL supernatants are taken,
It is added 1 mL copper reagent (5% copper acetate, pyridine tune pH6.1), 60 s of vortex oscillation, surveys absorbance in 715 nm, it is bent to substitute into standard
Line computation oleic acid concentration calculates free fatty acid content according to the sampling amount after deduction moisture.
After measured, the present embodiment treated fresh rice bran free fatty acid content is 0.9%, and rice bran is stored at room temperature
After 30 d, free fatty acid content 1.4%.
Embodiment 2
The present embodiment, specific steps are as follows:
(1) husking: hulling machine is used to take off paddy (kind is gold excellent 207, moisture content 13.3%) glume, mass flow 4
T/h, linear speed poor 2.7 m/s, 0.11 MPa of roll gap pressure.It then will be unhulled by the brown rice input grain separating machine after shelling
Paddy removal, 4 t/h of mass flow, 297 r/min of speed of crankshaft obtain fresh brown rice；
(2) moisten it is rough quenched: first prepare pH 3.4 citric acid and malic acid mixed solution (citric acid and malic acid molar ratio 1:
1) the resulting fresh brown rice of step (1), is inputted into brown rice quality controlling machine, and citric acid and malic acid mixed solution are atomized,
It is uniformly sprayed on brown rice, 4 t/h of mass flow, 15 L/h of amount of water, then brown rice is inputted brown rice by 0.35 MPa of air pressure
Storehouse stands 25 min, carries out primary quenched.The L-Methionine and L-cysteine mixing that compound concentration is 18 mmol/L again are molten
Primary quenched brown rice is inputted brown rice quality controlling machine by liquid (L-Methionine and L-cysteine molar ratio 1:1) again, and by L- egg
Propylhomoserin and L-cysteine mixed solution are atomized, and are uniformly sprayed on brown rice, 4 t/h of mass flow, 28 L/h of amount of water,
Then brown rice is inputted brown rice storehouse by 0.45 MPa of air pressure, stand 25 min, is carried out secondary quenched.Compound concentration is 0.16 g/ again
The ferulic acid and tea polyphenols mixed solution (ferulic acid and tea polyphenols molar ratio 1:1) of L, secondary quenched brown rice is inputted again rough
Rice quality controling machine, and ferulic acid and tea polyphenols mixed solution are atomized, it is uniformly sprayed on brown rice, 4 t/h of mass flow adds
Then brown rice is inputted brown rice storehouse by 27 L/h of water, 0.45 MPa of air pressure, stand 45 min, is carried out quenched three times；
(3) husk rice: quenched brown rice obtained in step (2) is inputted in rice mill and carries out husk rice, 4 t/h of mass flow, air quantity
40 m3/ min, static pressure -110 mmAq, such Qing Nian tri- obtain rice and fresh rice bran.
Fresh rice bran and the measuring method and embodiment 1 for storing free fatty acid content in the rice bran after 30 d at room temperature
It is identical.
After measured, the present embodiment treated fresh rice bran free fatty acid content is 0.8%, and rice bran is stored at room temperature
After 30 d, 1.2 % of free fatty acid content.
Embodiment 3
The present embodiment, specific steps are as follows:
(1) husking: hulling machine is used to take off paddy (kind is Hunan evening Xian 13, moisture content 13.5%) glume, mass flow 5
T/h, linear speed poor 2.9 m/s, 0.12 MPa of roll gap pressure.It then will be unhulled by the brown rice input grain separating machine after shelling
Paddy removal, 5 t/h of mass flow, 300 r/min of speed of crankshaft obtain fresh brown rice；
(2) moisten rough quenched: first preparing the malic acid solution of pH3.6, the resulting fresh brown rice of step (1) is inputted into brown rice condition
Machine, and malic acid solution is atomized, it is uniformly sprayed on brown rice, 5 t/h of mass flow, 20 L/h of amount of water, air pressure 0.4
Then brown rice is inputted brown rice storehouse by MPa, stand 30 min, is carried out primary quenched.The L- half that compound concentration is 20 mmol/L again
Primary quenched brown rice is inputted brown rice quality controlling machine again, and L-cysteine solution is atomized by cystine solution, uniformly
It is sprayed on brown rice, 5 t/h of mass flow, 30 L/h of amount of water, 0.5 MPa of air pressure, brown rice is then inputted into brown rice storehouse, stand
30 min are carried out secondary quenched.Compound concentration is the tea polyphenols solution of 0.2 g/L again, and secondary quenched brown rice is inputted again
Brown rice quality controlling machine, and ferulic acid/tea polyphenols solution is atomized, it is uniformly sprayed on brown rice, 5 t/h of mass flow adds water
28 L/h, 0.5 MPa of air pressure are measured, brown rice is then inputted into brown rice storehouse, stands 60 min, is carried out quenched three times；
(3) husk rice: quenched brown rice obtained in step (2) is inputted in rice mill and carries out husk rice, 5 t/h of mass flow, air quantity
48 m3/ min, static pressure -120 mmAq, such Qing Nian tri- obtain rice and fresh rice bran.
Fresh rice bran and the measuring method and embodiment 1 for storing free fatty acid content in the rice bran after 30 d at room temperature
It is identical.
After measured, fresh rice bran free fatty acid content is 0.6% after the present embodiment processing, and rice bran stores 30 at room temperature
After d, 1.1 % of free fatty acid content.
Claims (9)
1. a kind of utilize the rough quenched method for inhibiting rice bran rancid of profit, which comprises the following steps:
(1) husking impurity elimination: being taken off paddy glume using hulling machine, then will not by the brown rice input grain separating machine after shelling
The paddy of shelling removes, and obtains fresh brown rice；
(2) moisten rough quenched: the resulting fresh brown rice input brown rice quality controlling machine progress of step (1) is quenched for the first time, by citric acid
The mixed solution of solution or malic acid solution or citric acid and malic acid is atomized, and is uniformly sprayed on brown rice, completes first
It is secondary quenched；Will it is quenched for the first time after brown rice input again brown rice quality controlling machine carry out it is second quenched, by L-Methionine solution or
L-cysteine solution or L-Methionine and the mixed solution of L-cysteine are atomized, and are uniformly sprayed on brown rice, then
Brown rice is inputted into brown rice storehouse, is stood, is completed quenched for the second time；Will second it is quenched after brown rice input again brown rice quality controlling machine into
Row third time is quenched, the mixed solution of asafoetide acid solution or tea polyphenols solution or ferulic acid and tea polyphenols is atomized, uniformly
It is sprayed on brown rice, brown rice is then inputted into brown rice storehouse, stand, it is quenched to complete third time；
(3) husk rice separates: will carry out husk rice in the brown rice input rice mill in step (2) after quenched three times, obtains rice
And fresh rice bran.
2. utilizing the rough quenched method for inhibiting rice bran rancid of profit according to claim 1, which is characterized in that in step (1), rice huller
3~5 t/h of mass flow of paddy machine, linear speed poor 2.1~2.9 m/s, 0.10~0.12 MPa of roll gap pressure；Grain separating machine
3~5 t/h of mass flow, 295~300 r/min of speed of crankshaft.
3. according to claim 1 or claim 2 utilize the rough quenched method for inhibiting rice bran rancid of profit, which is characterized in that step (2)
In, quenched for the first time, the mass flow of brown rice quality controlling machine is 3~5 t/h, and amount of water is 10~20 L/h, air pressure is 0.3~
0.4 MPa, brown rice input brown rice storehouse after time of repose be 20~30 min.
4. utilizing the rough quenched method for inhibiting rice bran rancid of profit described according to claim 1~one of 3, which is characterized in that step
(2) in, second quenched, and the mass flow of brown rice quality controlling machine is 3~5 t/h, and amount of water is 24~30 L/h, air pressure 0.4
~0.5 MPa, brown rice input brown rice storehouse after time of repose be 20~30 min.
5. utilizing the rough quenched method for inhibiting rice bran rancid of profit described according to claim 1~one of 4, which is characterized in that step
(2) in, third time is quenched, and the mass flow of brown rice quality controlling machine is 3~5 t/h, and amount of water is 26~28 L/h, air pressure 0.4
~0.5 MPa, brown rice input brown rice storehouse after time of repose be 30~60 min.
6. utilizing the rough quenched method for inhibiting rice bran rancid of profit described according to claim 1~one of 5, which is characterized in that step
(3) in, the mass flow in rice mill is 3~5 t/h, and air quantity is 32~48 m3/ min, static pressure are -100~-120 mmAq,
In triplicate.
7. utilizing the rough quenched method for inhibiting rice bran rancid of profit described according to claim 1~one of 6, which is characterized in that step
(2) in, the mixed solution preparation method of citric acid solution used quenched for the first time or malic acid solution or citric acid and malic acid:
It is first configured to the solution of 2 mol/L, then the solution of 2 mol/L is added drop-wise in pure water, is surveyed during dropwise addition with pH meter
It is fixed, until being formulated as the solution of pH 3.2~3.6.
8. utilizing the rough quenched method for inhibiting rice bran rancid of profit described according to claim 1~one of 7, which is characterized in that step
(2) in, the mixing of second of quenched L-Methionine solution used or L-cysteine solution or L-Methionine and L-cysteine
The concentration of solution is 16~20 mmol/L.
9. utilizing the rough quenched method for inhibiting rice bran rancid of profit described according to claim 1~one of 8, which is characterized in that step
(2) in, the concentration of the mixed solution of the quenched asafoetide acid solution used of third time or tea polyphenols solution or ferulic acid and tea polyphenols is
0.1~0.2 g/L.
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| CN110075949A (en) * | 2019-05-20 | 2019-08-02 | 安徽晨阳粮油股份有限公司 | A kind of big rice processing method improving rice milling yield |
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