CN110384195B - Rice bran fresh-keeping method - Google Patents
Rice bran fresh-keeping method Download PDFInfo
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- CN110384195B CN110384195B CN201910591550.8A CN201910591550A CN110384195B CN 110384195 B CN110384195 B CN 110384195B CN 201910591550 A CN201910591550 A CN 201910591550A CN 110384195 B CN110384195 B CN 110384195B
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- ferulic acid
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
- A23L3/3454—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of liquids or solids
- A23L3/3463—Organic compounds; Microorganisms; Enzymes
- A23L3/3481—Organic compounds containing oxygen
- A23L3/3508—Organic compounds containing oxygen containing carboxyl groups
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Abstract
The invention discloses a rice bran fresh-keeping method, which is characterized by comprising a ferulic acid preparation process, wherein the generated ferulic acid aqueous solution is used for a rice bran fresh-keeping method, and the soaked rice bran is subjected to dehydration drying treatment, including cold air drying, hot air drying or extrusion drying; performing a molding process to obtain fresh-keeping rice bran, wherein the ferulic acid preparation process comprises ferulic acid crude extraction, ferulic acid refining and crystallization separation; the invention has the advantages that the ferulic acid aqueous solution generated in the production process of the ferulic acid is creatively used for preserving the rice bran, thereby greatly reducing the production cost and reducing the difficulty of treating the waste water generated in the production of the ferulic acid; a freezing crystallization process is introduced, so that the problems that the change of fatty acid is accelerated and the acid value is high because the ferulic acid aqueous solution contains a large amount of sulfate are solved; a molding process is introduced to convert rice bran starch and protein into loose particle structures, so that moisture can be removed, and the rice bran can be preserved and kept fresh.
Description
The technical field is as follows:
the invention belongs to the technical field of grain and oil product processing, and particularly relates to a rice bran fresh-keeping method.
Background art:
the invention discloses an anti-browning preservative and a vegetable preservation method, and discloses a vegetable preservation method by using ferulic acid, which proves the positive effect of the ferulic acid in the preservation field, but the ferulic acid has higher price and is unrealistic to be applied in the grain and oil processing field.
The invention content is as follows:
in order to solve the problems and overcome the defects of the prior art, the invention provides a rice bran fresh-keeping method;
the first technical problem to be solved is that if the cost of rice bran preservation by ferulic acid is reduced;
the second technical problem to be solved is the problem of the discharge of waste water containing a large amount of ferulic acid.
The specific technical scheme for solving the technical problems comprises the following steps: the rice bran fresh-keeping method comprises the following specific steps:
the method comprises the following steps: rice bran is pretreated to remove broken rice, ropes, stones and other mechanical impurities;
step two: adding rice bran into 0.03-0.1 wt% ferulic acid aqueous solution, and controlling water content to 14%;
step three: dehydrating and drying the soaked rice bran, including cold air drying, hot air drying or extrusion drying;
step four: performing a molding process; to obtain the fresh-keeping processed rice bran.
Further, the ferulic acid aqueous solution is prepared by a ferulic acid preparation process.
Further, the ferulic acid preparation process comprises a ferulic acid crude extraction process and a ferulic acid refining process; the method specifically comprises the following steps:
(1) the ferulic acid crude extraction process comprises the following steps: adding acid into the extract containing ferulic acid to adjust the pH value to acidity, crystallizing and separating ferulic acid from the extract, and filtering to obtain a ferulic acid crude product and a ferulic acid aqueous solution I;
(2) the ferulic acid refining process comprises the following steps: adding water into the ferulic acid crude product obtained in the step (1), adjusting the pH value to be alkaline and dissolving, adding activated carbon, heating and stirring, filtering to obtain filtrate, adding acid into the filtrate to adjust the pH value to be acidic, crystallizing and separating ferulic acid from the extract, and filtering to obtain the ferulic acid crude product and a ferulic acid aqueous solution II.
(3) Mixing ferulic acid water solution I and ferulic acid water solution II.
Further, freezing and crystallizing the combined ferulic acid aqueous solution I and ferulic acid aqueous solution II, filtering to obtain ferulic acid aqueous solution and filter cake containing sodium sulfate salt and impurities, and using the ferulic acid aqueous solution for preserving rice bran.
Further, the molding process comprises a puffing process or a granulating process.
Further, the puffing process comprises the following steps: processing testa oryzae into small granules at 50-60 deg.C with a granulator.
Further, the granulation process comprises: processing the rice bran into granules with certain shapes by using an expansion machine at the temperature of 100-120 ℃.
The invention has the beneficial effects that: (1) the invention creatively utilizes the ferulic acid aqueous solution generated in the production process of the ferulic acid for preserving the rice bran, greatly reduces the production cost and lightens the difficulty of treating the waste water generated in the production of the ferulic acid;
(2) the invention creatively introduces a freezing crystallization process, and solves the problems that the change of fatty acid is accelerated and the acid value is high because the ferulic acid aqueous solution contains a large amount of sulfate;
(3) the invention creatively introduces the molding process to convert the rice bran starch and the protein into loose particle structures, which is beneficial to removing moisture and preserving the rice bran.
The specific implementation mode is as follows:
in the description of the invention, specific details are given only to enable a full understanding of the embodiments of the invention, but it should be understood by those skilled in the art that the invention is not limited to these details for the implementation. In other instances, well-known structures and functions have not been described or shown in detail to avoid obscuring the points of the embodiments of the invention. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific implementation mode of the invention is as follows:
1. the rice bran preservation method is characterized by comprising the following specific steps:
the method comprises the following steps: rice bran is pretreated to remove broken rice, ropes, stones and other mechanical impurities;
step two: adding rice bran into 0.03-0.1 wt% ferulic acid aqueous solution, and controlling water content to 14%;
step three: dehydrating and drying the soaked rice bran, including cold air drying, hot air drying or extrusion drying;
step four: performing a molding process; to obtain the fresh-keeping rice bran.
Further, the ferulic acid aqueous solution is prepared by a ferulic acid preparation process.
Further, the ferulic acid preparation process comprises a ferulic acid crude extraction process and a ferulic acid refining process; the method specifically comprises the following steps:
(1) the ferulic acid crude extraction process comprises the following steps: adding acid into the extract containing ferulic acid to adjust the pH value to acidity, crystallizing and separating ferulic acid from the extract, and filtering to obtain a ferulic acid crude product and a ferulic acid aqueous solution I;
(2) the ferulic acid refining process comprises the following steps: adding water into the ferulic acid crude product obtained in the step (1), adjusting the pH value to be alkaline and dissolving, adding activated carbon, heating and stirring, filtering to obtain filtrate, adding acid into the filtrate to adjust the pH value to be acidic, crystallizing and separating ferulic acid from the extract, and filtering to obtain the ferulic acid crude product and a ferulic acid aqueous solution II.
(3) Mixing ferulic acid water solution I and ferulic acid water solution II.
Further, freezing and crystallizing the combined ferulic acid aqueous solution I and ferulic acid aqueous solution II, filtering to obtain ferulic acid aqueous solution and filter cake containing sodium sulfate and impurities, and using the ferulic acid aqueous solution for preserving rice bran.
Further, the molding process comprises a puffing process or a granulating process.
Further, the puffing process comprises the following steps: processing the rice bran into small particles by a granulator at a temperature of 50-60 deg.C.
Further, the granulation process comprises: processing the rice bran into granules with certain shapes by using an expansion machine at the temperature of 100-120 ℃.
In order to more intuitively show the process advantages of the invention for recycling the ferulic acid aqueous solution wastewater, the method comprises the following steps:
the first embodiment is as follows: adding 0.1% by mass of ferulic acid aqueous solution into rice bran, wherein the ferulic acid aqueous solution is obtained from the ferulic acid preparation process described in the invention content, controlling the water content to be 14%, and performing dehydration drying treatment on the soaked rice bran, including cold air drying, hot air drying or extrusion drying; processing the rice bran into particles with certain shapes by using an expansion machine at the temperature of 100-120 ℃;
the second embodiment: adding 0.1 mass percent of ferulic acid aqueous solution into rice bran, wherein the ferulic acid aqueous solution is prepared by the ferulic acid preparation process described in the invention content, controlling the water content to be 14 percent, and performing dehydration drying treatment on the soaked rice bran, including cold air drying, hot air drying or extrusion drying; processing rice bran into small granules by a granulator at the temperature of 50-60 ℃;
comparative example one: preparing 0.1% by mass of pure ferulic acid aqueous solution, adding 0.1% by mass of pure ferulic acid aqueous solution into rice bran, controlling the water content to be 14%, and performing dehydration drying treatment on the soaked rice bran, including cold air drying, hot air drying or extrusion drying, to obtain rice bran;
comparative example two: preparing 0.1% by mass of pure ferulic acid aqueous solution, adding 0.1% by mass of pure ferulic acid aqueous solution into rice bran, controlling the water content to be 14%, and performing dehydration drying treatment on the soaked rice bran, including cold air drying, hot air drying or extrusion drying; processing the rice bran into particles with certain shapes by using an expansion machine at the temperature of 100-120 ℃;
comparative example three: preparing a pure ferulic acid aqueous solution with the mass percent of 0.1%, then performing freeze crystallization and filtration on the pure ferulic acid aqueous solution according to the freeze crystallization process described in the invention content, adding rice bran into the pure ferulic acid aqueous solution with the mass percent of 0.1%, controlling the water content to be 14%, and performing dehydration drying treatment on the soaked rice bran, wherein the dehydration drying treatment comprises cold air drying, hot air drying or extrusion drying; processing the rice bran into particles with certain shapes by using an expansion machine at the temperature of 100-120 ℃;
comparative example four: adding 0.1% by mass of ferulic acid aqueous solution into rice bran, wherein the ferulic acid aqueous solution is obtained by the ferulic acid preparation process described in the invention content, removing a freezing crystallization process, controlling the water content to be 14%, canceling a plasticity process, and directly drying the rice bran, including cold air drying, hot air drying or extrusion drying; obtaining rice bran;
comparative example five: adding 0.1% by mass of ferulic acid aqueous solution into rice bran, wherein the ferulic acid aqueous solution is obtained by the ferulic acid preparation process described in the invention content, removing a freezing crystallization process, controlling the water content to be 14%, and performing dehydration drying treatment on the soaked rice bran, including cold air drying, hot air drying or extrusion drying; processing the rice bran into particles with certain shapes by using an expansion machine at the temperature of 100-120 ℃ to obtain the rice bran;
comparative example six: adding 0.1% by mass of ferulic acid aqueous solution into rice bran, wherein the ferulic acid aqueous solution is prepared by the ferulic acid preparation process described in the invention content, controlling the water content to be 14%, and performing dehydration drying treatment on the soaked rice bran, including cold air drying, hot air drying or extrusion drying, to obtain the rice bran;
and the rice bran obtained in the first example, the second example and the first to sixth comparative examples is used for preparing rice bran oil by adopting a solvent leaching method according to the same conditions, and the acid value is measured according to GB/T19112-:
in order to more intuitively show the process advantages of the invention of recycling the ferulic acid aqueous solution wastewater, the invention is characterized in that the method for preserving rice bran by using the ferulic acid aqueous solution generated in the production process of ferulic acid is compared with the method for preserving rice bran by using the ferulic acid solution with the same concentration prepared from pure ferulic acid in the same process,
table 1: ferulic acid aqueous solution cost analysis meter
| Ferulic acid | Molding process | Aqueous ferulic acid solution treatment | Acid value | |
| Example one | Aqueous solution of ferulic acid | Puffing process | Freezing crystallization | 1.8 |
| Example two | Aqueous solution of ferulic acid | Granulation process | Freezing crystallization | 1.9 |
| Comparative example 1 | Pure product | Is composed of | Is composed of | 2.9 |
| Comparative example No. two | Pure product | Puffing process | Is free of | 1.9 |
| Comparative example No. three | Pure product | Puffing process | Freezing crystallization | 1.8 |
As is clear from Table 1, the method of using ferulic acid to prepare ferulic acid solution with the same concentration for rice bran preservation has a small difference of acid value compared with the method of using ferulic acid aqueous solution wastewater of the invention for rice bran preservation, but the cost of ferulic acid powder is higher.
In order to more intuitively show the advantages of the molding process and the freezing crystallization process of the invention, the first embodiment, the second embodiment and the first to sixth comparative embodiments are compared:
table 2: ferulic acid water solution effect analysis table
| Ferulic acid | Molding process | Aqueous ferulic acid solution treatment | Acid value | |
| Example one | Aqueous solution of ferulic acid | Puffing process | Freezing crystallization | 1.8 |
| Example two | Aqueous solution of ferulic acid | Granulation process | Freezing crystallization | 1.9 |
| Comparative example 1 | Pure product | Is free of | Is free of | 2.9 |
| Comparative example No. two | Pure product | Puffing process | Is composed of | 1.9 |
| Comparative example No. three | Pure product | Puffing process | Freezing crystallization | 1.8 |
| Comparative example No. four | Aqueous solution of ferulic acid | Is free of | Is free of | 4.7 |
| Comparative example five | Aqueous solution of ferulic acid | Puffing process | Is composed of | 4.1 |
| Comparative example VI | Aqueous solution of ferulic acid | Is composed of | Freezing crystallization | 4.3 |
As is clear from table 2:
the acid value of example one did not change much compared to comparative examples two and three, but the acid value of comparative example one was higher due to the absence of the swelling process;
example one compared to comparative example one, comparative example one is higher, probably because there is no molding process, rice bran starch and protein can not be transformed into loose granular structure, which is not good for removing water, the deterioration of rice bran is accelerated, and the acid value is high;
example one compares to comparative example four, comparative example five and comparative example six:
(1) in comparative example four, the highest acid value was 4.7 due to the absence of the molding process and the freeze crystallization process;
(2) in the fifth comparative example, since there is no freeze crystallization process and since the ferulic acid aqueous solution is obtained from the ferulic acid preparation process as described in the summary of the invention, there are processes of multiple acidification and salt dissolution at this time, resulting in that the ferulic acid aqueous solution contains a large amount of sulfate, accelerating the change of fatty acid, and the acid value becomes high;
(3) in the sixth comparative example, because no molding process exists, rice bran starch and protein cannot be converted into loose particle structures, so that moisture is not removed easily, deterioration of rice bran is accelerated, and the acid value is increased;
in summary, the following steps: (1) the invention creatively utilizes the ferulic acid aqueous solution generated in the production process of the ferulic acid for preserving the rice bran, greatly reduces the production cost and lightens the difficulty of treating the waste water generated in the production of the ferulic acid;
(2) the invention creatively introduces a freezing crystallization process, and solves the problems that the change of fatty acid is accelerated and the acid value is high because the ferulic acid aqueous solution contains a large amount of sulfate;
(3) the invention creatively introduces the molding process to convert the rice bran starch and the protein into loose particle structures, which is beneficial to removing moisture and preserving the rice bran.
Claims (3)
1. A rice bran fresh-keeping method is characterized by comprising the following specific steps:
the method comprises the following steps: rice bran is pretreated to remove broken rice, ropes, stones and other mechanical impurities;
step two: adding rice bran into 0.03-0.1 wt% ferulic acid aqueous solution, and controlling water content to 14%;
step three: dehydrating and drying the soaked rice bran, including cold air drying, hot air drying or extrusion drying;
step four: performing a molding process; obtaining fresh-keeping rice bran; the molding process comprises a puffing process or a granulating process;
the ferulic acid aqueous solution is prepared by a ferulic acid preparation process; the ferulic acid preparation process comprises a ferulic acid crude extraction process and a ferulic acid refining process; the method specifically comprises the following steps:
(1) the ferulic acid crude extraction process comprises the following steps: adding acid into the extract containing ferulic acid to adjust the pH value to acidity, crystallizing and separating ferulic acid from the extract, and filtering to obtain a ferulic acid crude product and a ferulic acid aqueous solution I;
(2) the ferulic acid refining process comprises the following steps: adding water into the ferulic acid crude product obtained in the step (1), adjusting the pH value to be alkaline and dissolving, adding activated carbon, heating and stirring, filtering to obtain a filtrate, adding acid into the filtrate to adjust the pH value to be acidic, crystallizing and separating ferulic acid from an extracting solution, and filtering to obtain the ferulic acid crude product and a ferulic acid aqueous solution II;
(3) mixing the ferulic acid aqueous solution I and the ferulic acid aqueous solution II;
(4) and (3) freezing and crystallizing the combined ferulic acid aqueous solution I and ferulic acid aqueous solution II, filtering to obtain ferulic acid aqueous solution and a filter cake containing sodium sulfate and impurities, and using the ferulic acid aqueous solution for preserving the rice bran.
2. The rice bran refreshing method according to claim 1, wherein the puffing process comprises: processing testa oryzae into small granules at 50-60 deg.C with a granulator.
3. The rice bran refreshing method according to claim 1, wherein the granulation process comprises: processing the rice bran into granules with certain shapes by using an expansion machine at the temperature of 100-120 ℃.
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| CN110384195B true CN110384195B (en) | 2022-09-27 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101180983A (en) * | 2007-12-14 | 2008-05-21 | 沈阳农业大学 | Method for preventing fresh rice bran fats from oxidating |
| CN102715384A (en) * | 2012-06-27 | 2012-10-10 | 句容苏润米业有限公司 | Comprehensive treatment method for keeping freshness of rice bran for feed |
| CN104628553A (en) * | 2013-11-08 | 2015-05-20 | 上海凯鑫分离技术有限公司 | Ferulic acid purification process |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101180983A (en) * | 2007-12-14 | 2008-05-21 | 沈阳农业大学 | Method for preventing fresh rice bran fats from oxidating |
| CN102715384A (en) * | 2012-06-27 | 2012-10-10 | 句容苏润米业有限公司 | Comprehensive treatment method for keeping freshness of rice bran for feed |
| CN104628553A (en) * | 2013-11-08 | 2015-05-20 | 上海凯鑫分离技术有限公司 | Ferulic acid purification process |
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