CN113115897A - Method for reducing arsenic content of arsenic-containing substance and application - Google Patents

Method for reducing arsenic content of arsenic-containing substance and application Download PDF

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Publication number
CN113115897A
CN113115897A CN201911417573.3A CN201911417573A CN113115897A CN 113115897 A CN113115897 A CN 113115897A CN 201911417573 A CN201911417573 A CN 201911417573A CN 113115897 A CN113115897 A CN 113115897A
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China
Prior art keywords
arsenic
particle size
content
classifier
rice bran
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CN201911417573.3A
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Chinese (zh)
Inventor
张毓
殷宝茹
郑妍
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Wilmar Shanghai Biotechnology Research and Development Center Co Ltd
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Wilmar Shanghai Biotechnology Research and Development Center Co Ltd
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Priority to CN201911417573.3A priority Critical patent/CN113115897A/en
Publication of CN113115897A publication Critical patent/CN113115897A/en
Pending legal-status Critical Current

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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
    • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
    • 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
    • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
    • A23L5/21—Removal of unwanted matter, e.g. deodorisation or detoxification by heating without chemical treatment, e.g. steam treatment, cooking
    • 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
    • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
    • A23L5/25—Removal of unwanted matter, e.g. deodorisation or detoxification using enzymes
    • 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
    • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
    • A23L5/27—Removal of unwanted matter, e.g. deodorisation or detoxification by chemical treatment, by adsorption or by absorption
    • 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
    • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/30—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation
    • A23L5/32—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation using phonon wave energy, e.g. sound or ultrasonic waves
    • 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
    • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/30—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation
    • A23L5/34—Physical treatment, e.g. electrical or magnetic means, wave energy or irradiation using microwaves
    • 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
    • A23L7/00—Cereal-derived products; Malt products; Preparation or treatment thereof
    • A23L7/10—Cereal-derived products
    • 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
    • A23L7/00—Cereal-derived products; Malt products; Preparation or treatment thereof
    • A23L7/10—Cereal-derived products
    • A23L7/115—Cereal fibre products, e.g. bran, husk

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Microbiology (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The present application provides a method of reducing the arsenic content of an arsenic-containing material, comprising: crushing the arsenic-containing material; classifying the crushed arsenic-containing substances, and collecting fractions with low arsenic content; wherein the fraction has an angle of repose of from 50 ° to 52 °, preferably from 50.5 ° to 51.9 °; and the degree of compression of said fraction is between 51% and 54%, preferably between 51.1% and 53.7%. The application also provides a food material with low arsenic content obtained by the method and the use thereof.

Description

Method for reducing arsenic content of arsenic-containing substance and application
Technical Field
The application relates to the physical and food fields, in particular provides a method for reducing the arsenic content of an arsenic-containing substance, a food raw material with low arsenic content obtained by the method and application thereof.
Background
The rice bran is a main byproduct of rice processing, accounts for 5-5.5% of the weight of rice, concentrates 64% of nutrients and 90% of essential elements of a human body in the rice, contains abundant nutrients such as protein, fat, saccharides, dietary fibers, mineral substances, B vitamins and vitamin E, and also contains various bioactive substances such as phytic acid, oryzanol, gamma-aminobutyric acid, ceramide, octacosanol and the like. Therefore, the rice bran has high health care development value and can be used as a raw material of functional food.
In recent years, with the rapid development of industrial and agricultural production, soil pollution is caused to different degrees, so that the content of inorganic arsenic in rice in certain areas is high, and people pay attention to the problem of arsenic pollution in food crops on which human beings depend for survival. Compared with other grain crops, rice grows in a paddy field environment, and arsenic pollution of rice is aggravated when water polluted by arsenic is used for irrigation or an arsenic-containing pesticide is used. Recently, the arsenic content in the rice bran protein is found to be obviously over-standard, and the food safety problem is particularly prominent.
The heavy metals are not evenly distributed in the grains, and the heavy metal content is relatively high in the parts with high protein content. Heavy metals are mainly present in the grains in an organic bound state and are mainly bound with proteins such as globulin and gluten, crude fiber and phytic acid are also bound to a certain extent, and starch and fat are less bound. In the GB 2762-2017 (pollutant limit in national food safety standard), the arsenic content of grains and products thereof is limited, and the total arsenic is required to be not more than 0.5 mg/kg.
At present, the method for reducing heavy metal residues in grains such as rice polluted by heavy metals and processing byproducts mainly comprises the steps of cleaning, soaking, settling, separating and the like to obtain products such as protein, starch and the like with lower metal contents, which refer to Chinese patent applications CN103461646B (a method suitable for removing arsenic elements in rice bran) and CN103549234A (a method for reducing heavy metals in grains). Furthermore, chinese patent application CN109788780A (chelating agent for reducing the metal content in food products and related methods) found that complexes can be formed by using metal chelating agents in combination with heavy metals and then isolating the complexes, but this method requires that the complexes be soluble in water. In summary, current methods for reducing or removing arsenic from food such as grains are wet methods, which generate waste liquid and have high requirements for equipment.
There is a need in the art to develop new methods for reducing the arsenic content of arsenic-containing materials.
Summary of The Invention
In a first aspect, the present application provides a method of reducing the arsenic content of an arsenic-containing material, comprising:
crushing the arsenic-containing material; and
classifying the crushed arsenic-containing substances, and collecting fractions with low arsenic content;
wherein the fraction has an angle of repose of from 50 ° to 52 °; and
the degree of compression of the fractions is between 51% and 54%.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D10 of 2 to 5 μm.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D50 of 20 to 50 μm.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D90 of 50 to 110 μm.
In some embodiments of the first aspect, the equipment used to break up the arsenic species is selected from: mechanical mills, jet mills, grinders and cryogenic mills.
In some embodiments of the first aspect, the equipment used to break the arsenic species has a host rotational speed of 3000 and 7000 rpm.
In some embodiments of the first aspect, the equipment used to break up the arsenic species has a classification impeller speed of 2500-.
In some embodiments of the first aspect, the apparatus for classifying the crushed arsenic-containing material is a gas stream classifier.
In some embodiments of the first aspect, the apparatus for classifying an arsenic material after comminution has a classification impeller speed of 1100-.
In some embodiments of the first aspect, the method further comprises stabilizing the arsenic-containing material prior to breaking the arsenic-containing material.
In some embodiments of the first aspect, the stabilizing treatment is an extrusion treatment, a dry heat treatment, a wet heat treatment, an enzymatic treatment, a microwave treatment, or an ultrasonic treatment.
In some embodiments of the first aspect, the arsenic-containing material is an arsenic-containing food material.
In some embodiments of the first aspect, the arsenic-containing material is an arsenic-containing rice food material.
In some embodiments of the first aspect, the arsenic-containing material is rice bran, crushed rice flour, rice husk and/or brown rice.
In a second aspect, the present application provides a food material with a low arsenic content obtained by the method of the first aspect.
In some embodiments of the second aspect, the low arsenic food material has an arsenic content of <0.5 mg/kg.
In a third aspect, the present application provides the use of a low arsenic food material according to the second aspect for the preparation of a food product.
Detailed description of the invention
Arsenic-containing food materials (e.g., rice bran, crushed rice flour, rice husk and/or brown rice) have high nutritional values, but their use is greatly limited due to the excessive arsenic content. The inventors of the present application have developed a new method for reducing the arsenic content of an arsenic-containing material through research. Reducing the arsenic content of an arsenic-containing material using the method of reducing the arsenic content of an arsenic-containing material of the present application has one or more of the following advantages:
1. compared with a wet method for reducing the arsenic content, the method has the advantages of simple steps, water saving and energy saving.
2. The method avoids acid washing, enzymolysis and other treatments, and reduces the damage degree of each component of the arsenic-containing substance.
3. The low-arsenic food raw material obtained by the method has the arsenic content lower than 0.5mg/kg and meets the national standard.
4. The low arsenic food material obtained by the method of the present application has a high protein content.
Definition of
The following definitions are provided to better illustrate the content of the present application and to guide those of ordinary skill in the art in practicing the various inventions of the present application. Unless otherwise indicated, the terms in this application have the same meaning as commonly understood by one of ordinary skill in the art, e.g., in reference to starting materials and products, operating steps, process parameters, equipment and tools used, and numerical units. All patent documents, academic papers, and other publications cited herein are incorporated by reference in their entirety.
The term "rice bran" as used herein refers to the by-products of rice processing, mainly including the parts of the pericarp, seed coat, endosperm, aleurone layer and embryo.
The term "defatted rice bran" as used herein refers to rice bran obtained by extracting fat from rice bran (i.e., rice bran oil), which is generally a byproduct after the rice bran oil is prepared from rice bran as a basic raw material in order to reduce rancidity of the fat from the rice bran.
The term "angle of repose" as used herein, also referred to as angle of repose, refers to the minimum angle from a horizontal surface at which an incline places an object placed on the incline in a critical state of sliding down the incline (i.e., as the angle of inclination increases, the object on the incline will slide down more easily; when the object reaches a state at which it begins to slide down, the angle at this critical state is referred to as the angle of repose.
The term "degree of compression" as used herein refers to the degree of compression of a substance, when the degree of compression is less than 20%, the fluidity of the material is good; when the degree of compression is more than 40%, the fluidity is lowered and the fluid is not easily self-flowed out from the container.
The term "particle size D10" as used herein refers to a particle size having a cumulative particle distribution of 10%, i.e. the volume content of particles smaller than this particle size is 10% of the total particles.
The term "particle size D50" as used herein refers to the particle size of 50% of the cumulative particle distribution, also known as the median or median particle size, which is a typical value representing the size of the particle, which accurately divides the population into two equal parts, i.e., 50% of the particles have a particle size above this value and 50% of the particles have a particle size below this value.
The term "particle size D90" as used herein refers to a particle size having a cumulative particle distribution of 90%, i.e. the volume content of particles smaller than this particle size is 90% of the total particles.
It should be understood that the specific values given herein (e.g., in the main machine rotational speed and the classifying impeller rotational speed of the crushing plant) are not only to be understood as separate values, but are also to be considered as providing endpoints of a range, and other ranges may be provided in combination with each other. For example, while it is disclosed that the classifying impeller of the crushing plant has a rotational speed of 2500 rpm and 4500 rpm, it is correspondingly disclosed that the classifying impeller of the crushing plant may have a rotational speed of 2500-.
Detailed description of the preferred embodiments
It should be understood that the various steps in the methods described below are not necessarily required to implement all or all of the steps of the methods of the present application, and some steps may be omitted, replaced by other similar steps, or some other steps may be added. Furthermore, it is to be understood that the various technical features (e.g. parameter values and ranges) described below are not limited to the specific embodiments in their context, but may be combined arbitrarily with other technical features, as may be foreseen by the person skilled in the art, within reasonable circumstances.
In a first aspect, the present application provides a method of reducing the arsenic content of an arsenic-containing material, comprising:
crushing the arsenic-containing material; and
classifying the crushed arsenic-containing substances, and collecting fractions with low arsenic content;
wherein the fraction has an angle of repose of from 50 ° to 52 °; and
the degree of compression of the fractions is between 51% and 54%.
In some embodiments of the first aspect, the fraction has an angle of repose of 50 ° to 52 °, e.g., 50 °, 50.1 °, 50.2 °, 50.3 °, 50.4 °, 50.5 °, 50.6 °, 50.7 °, 50.8 °, 50.9 °, 51 °, 51.1 °, 51.2 °, 51.3 °, 51.4 °, 51.5 °, 51.6 °, 51.7 °, 51.8 °, 51.9 °, 52 °, or a range consisting of or a value between any two of the above values.
In some embodiments of the first aspect, the fraction has an angle of repose of from 50.5 ° to 51.9 °, e.g., 50.5 °, 50.6 °, 50.7 °, 50.8 °, 50.9 °, 51 °, 51.1 °, 51.2 °, 51.3 °, 51.4 °, 51.5 °, 51.6 °, 51.7 °, 51.8 °, 51.9 °, or a range consisting of or a value between any two of the above values.
In some embodiments of the first aspect, the fraction has an angle of repose of 50.6 °, 50.7 °, 50.8 °, 51.4 °, 51.5 °, 51.6 °, or 51.9 °.
In some embodiments of the first aspect, the fraction has a degree of compression of 51% to 54%, e.g., 51%, 51.1%, 51.11%, 51.12%, 51.13%, 51.14%, 51.15%, 51.16%, 51.17%, 51.18%, 51.19%, 51.2%, 51.3%, 51.4%, 51.5%, 51.51%, 51.52%, 51.53%, 51.54%, 51.55%, 51.56%, 51.57%, 51.58%, 51.59%, 51.6%, 51.7%, 51.8%, 51.9%, 52%, 52.1%, 52.2%, 52.3%, 52.4%, 52.5%, 52.6%, 52.7%, 52.8%, 52.9%, 52.91%, 52.92%, 52.93%, 52.94%, 52.95%, 52.96%, 52.97%, 52.98%, 52.99%, 53%, 53.1%, 53.11%, 53.12%, 53.13%, 2%, 53. 53.16%, 53. 53.14 3%, 53.53%, 53%, 53.27%, 53%, 53.53%, 53%, 53.53%, 53% 53.32%, 53% or 53, 53.37%, 53.38%, 53.39%, 53.4%, 53.5%, 53.6%, 53.61%, 53.62%, 53.63%, 53.64%, 53.65%, 53.66%, 53.67%, 53.68%, 53.69%, 53.7%, 53.8%, 53.9%, 54%, or a range consisting of or a value between any two of the above values.
In some embodiments of the first aspect, the fraction has a degree of compression of 51.1% to 53.7%, e.g., 51.1%, 51.11%, 51.12%, 51.13%, 51.14%, 51.15%, 51.16%, 51.17%, 51.18%, 51.19%, 51.2%, 51.3%, 51.4%, 51.5%, 51.51%, 51.52%, 51.53%, 51.54%, 51.55%, 51.56%, 51.57%, 51.58%, 51.59%, 51.6%, 51.7%, 51.8%, 51.9%, 52%, 52.1%, 52.2%, 52.3%, 52.4%, 52.5%, 52.6%, 52.7%, 52.8%, 52.9%, 52.91%, 52.92%, 52.93%, 52.94%, 52.95%, 52.96%, 52.97%, 52.98%, 52.99%, 53%, 53.1%, 53.11%, 53.12%, 53%, 53.13%, 53.14%, 52.53%, 53.53%, 53%, 53.7378%, 53%, 53.53%, 53%, 53.73727%, 53%, 53.53%, 53%, 53.27%, 53% and 53% 4625, 53.38%, 53.39%, 53.4%, 53.5%, 53.6%, 53.61%, 53.62%, 53.63%, 53.64%, 53.65%, 53.66%, 53.67%, 53.68%, 53.69%, 53.7%, or a range consisting of or a value between any two of the above values.
In some specific embodiments of the first aspect, the degree of compression of the fraction is 51.18%, 51.59%, 52.94%, 53.11%, 53.25%, 53.39% or 53.67%.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D10 of 2 to 5 μm, e.g., 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5 μm, or a range consisting of any two or a number between any two of the above.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D10 of 2.9 to 4.9 μm, e.g., 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9 μm, or a range consisting of or a number between any two of the above values.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D10 of 2.9 μm, 3.5 μm, 3.6 μm, 4.3 μm, or 4.9 μm.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D50 of 20 to 50 μm, e.g., 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 29.1, 29.2, 29.3, 29.4, 29.5, 29.6, 29.7, 29.8, 29.9, 30, 31, 32, 33, 34, 35, 36, 36.1, 36.2, 36.3, 36.4, 36.5, 36.6, 36.7, 36.8, 36.9, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 48.1, 48.2, 48.3, 48.4, 48.5, 48.6, 48.7, 48.8, 48.9, 49, 50 μm, or a range or a value between any two or more values.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D50 of 24 to 49 μm, e.g., 24, 25, 26, 27, 28, 29, 29.1, 29.2, 29.3, 29.4, 29.5, 29.6, 29.7, 29.8, 29.9, 30, 31, 32, 33, 34, 35, 36, 36.1, 36.2, 36.3, 36.4, 36.5, 36.6, 36.7, 36.8, 36.9, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 48.1, 48.2, 48.3, 48.4, 48.5, 48.6, 48.7, 48.8, 48.9, 49 μm, or a range or a number between any two or more values.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D50 of 24 μm, 29.1 μm, 29.3 μm, 36.1 μm, or 48.2 μm.
In some embodiments of the first aspect, the particle size D90 of the crushed arsenic-containing material is between 50 μm and 110 μm, e.g., between any two or more of values 50, 51, 52, 53, 53.1, 53.2, 53.3, 53.4, 53.5, 53.6, 53.7, 53.8, 53.9, 54, 55, 56, 56.1, 56.2, 56.3, 56.4, 56.5, 56.6, 56.7, 56.8, 56.9, 57, 58, 58.1, 58.2, 58.3, 58.4, 58.5, 58.6, 58.7, 58.8, 58.9, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 70.1, 70.2, 70.3, 70.4, 70.5, 70.6, 70.7, 70.8, 70.9, 71, 72, 73, 80, 98, 95, 98, 98.6, 98, 98.1, 98.2, 98, 100, or more values.
In some embodiments of the first aspect, the particle size D90 of the crushed arsenic-containing material is between 53 μm and 100 μm, e.g., any value between 53, 53.1, 53.2, 53.3, 53.4, 53.5, 53.6, 53.7, 53.8, 53.9, 54, 55, 56, 56.1, 56.2, 56.3, 56.4, 56.5, 56.6, 56.7, 56.8, 56.9, 57, 58, 58.1, 58.2, 58.3, 58.4, 58.5, 58.6, 58.7, 58.8, 58.9, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 70.1, 70.2, 70.3, 70.4, 70.5, 70.6, 70.7, 70.8, 70.9, 71, 72, 73, 74, 80, 90, 95, 96, 98, 98.1, 98.4, 98.5, 98, 98.6, 98, 98.7, 98, 98.8, 98, or more than two or more values.
In some embodiments of the first aspect, the crushed arsenic-containing material has a particle size D90 of 53.1 μm, 56.9 μm, 58.7 μm, 70.9 μm, or 98.1 μm.
In some embodiments of the first aspect, the equipment used to break up the arsenic species is selected from: mechanical mills, jet mills, grinders and cryogenic mills.
In some embodiments of the first aspect, the apparatus used to break up the arsenic-containing material is a mechanical mill, such as an impact mill or a food micronizer.
In some embodiments of the first aspect, the equipment used to break the arsenic species has a host rotational speed of 3000-.
In some embodiments of the first aspect, the equipment used to break the arsenic species has a host rotational speed of 4000-.
In some embodiments of the first aspect, the equipment used to break up the arsenic species has a main machine speed of 5000 rpm.
In some embodiments of the first aspect, the apparatus used to break the arsenic-containing material has a classification impeller speed of 2500-.
In some embodiments of the first aspect, the apparatus used to break the arsenic-containing material has a graded impeller speed of 2500-.
In some embodiments of the first aspect, the apparatus used to break up the arsenic-containing material has a classification impeller speed of 2500, 3000, 4000, or 4300 revolutions per minute.
In some embodiments of the first aspect, the apparatus used to break the arsenic-containing material has a current of 6 to 7 amps, e.g., 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7 amps, or a range consisting of any two of the above values or a value between any two of the above values.
In some embodiments of the first aspect, the apparatus used to break the arsenic-containing material has a current of 6 amps or 7 amps.
In some embodiments of the first aspect, the apparatus for classifying the crushed arsenic-containing material is a gas stream classifier.
In some embodiments of the first aspect, the apparatus for classifying an arsenic-containing material after comminution has a classification impeller speed of 1100-.
In some embodiments of the first aspect, the apparatus for classifying an arsenic-containing material after comminution has a classification impeller speed of 1200-.
In some embodiments of the first aspect, the apparatus for classifying the crushed arsenic-containing material has a classification impeller speed of 1200 rpm, 1800 rpm, or 2100 rpm.
In some embodiments of the first aspect, the separation is performed in a gas classifier, the suspended particles are contacted with a rotating classifier impeller sufficiently to control the rotational speed of the motor for classification, the crushed arsenic-containing material is separated according to the particle size and density of the particles, and finally the fine powder, i.e., the low arsenic food material, is collected by the classifier to obtain a fine powder and a coarse powder.
In some embodiments of the first aspect, the method further comprises stabilizing the arsenic-containing material prior to breaking the arsenic-containing material.
In some embodiments of the first aspect, the stabilizing treatment is an extrusion treatment, a dry heat treatment, a wet heat treatment, an enzymatic treatment, a microwave treatment, or an ultrasonic treatment.
In some embodiments of the first aspect, the stabilizing treatment is an extrusion treatment.
In some embodiments of the first aspect, the stabilizing treatment is extrusion treatment of the arsenic-containing material using a screw extruder at 130 ℃ for 15 seconds, followed by incubation at 97 ℃ for 3 minutes and cooling to room temperature.
In some embodiments of the first aspect, the arsenic-containing material is an arsenic-containing food material.
In some embodiments of the first aspect, the arsenic-containing material is an arsenic-containing rice food material.
In some embodiments of the first aspect, the arsenic-containing material is rice bran, crushed rice flour, rice husk and/or brown rice.
In some embodiments of the first aspect, the arsenic material is stabilized rice bran.
In some embodiments of the first aspect, the arsenic species is stabilized and defatted rice bran.
In a second aspect, the present application provides a food material with a low arsenic content obtained by the method of the first aspect.
In some embodiments of the second aspect, wherein the low arsenic content food material has an arsenic content <0.5 mg/kg.
In some specific embodiments of the second aspect, wherein the low arsenic content food material has an arsenic content of 0.43mg/kg, 0.44mg/kg, 0.46mg/kg, 0.48mg/kg or 0.49 mg/kg.
In a third aspect, the present application provides the use of a low arsenic food material according to the second aspect in the preparation of a food product.
The food product may include bread, cookies, cakes, energy bars, noodles, beverages, breakfast cereals, chocolate, meal replacement powders, ice cream, etc.
As an illustrative and non-limiting solution, the method of the present application may specifically comprise one or more of the following steps:
1) and (3) stabilizing treatment: the arsenic-containing material is subjected to an extrusion treatment (for example, the arsenic-containing material is extruded at 130 ℃ for 15 seconds by a screw extruder, then is kept at 97 ℃ for 3 minutes, and then is cooled to room temperature) to obtain the stabilized arsenic-containing material.
2) Defatting the stabilized arsenic-containing material (such as stabilized whole rice bran) at 90 deg.C for 4 hr with 95% ethanol at a feed-to-liquid ratio of 1:15 (w/v); after the treatment is finished, separating the rice bran solids from the ethanol by using a suction filtration device; separating the obtained solid powder, and performing rotary evaporation at 50 deg.C for 20min in a rotary evaporator to remove ethanol) to obtain defatted substance containing arsenic.
3) Crushing: crushing the defatted material (e.g., defatted rice bran) using an apparatus for crushing the arsenic material (e.g., a mechanical crusher); wherein the main machine rotating speed of the equipment for crushing the arsenic-containing substances is 3000-7000 rpm (for example, 5000 rpm), the grading impeller rotating speed is 2500-4500 rpm (for example, 2500 rpm, 3000 rpm, 4000 rpm or 4300 rpm), and the current of the grading impeller is 6-7 amperes (for example, 6 amperes or 7 amperes); the crushed arsenic-containing substance has a particle diameter D10 of 2 to 5 μm (e.g., 2.9 μm, 3.5 μm, 3.6 μm, 4.3 μm, or 4.9 μm), a particle diameter D50 of 20 to 50 μm (e.g., 24 μm, 29.1 μm, 29.3 μm, 36.1 μm, or 48.2 μm), and a particle diameter D90 of 50 to 110 μm (e.g., 53.1 μm, 56.9 μm, 58.7 μm, 70.9 μm, or 98.1 μm).
4) Fractionation (e.g., air stream fractionation): classifying the crushed arsenic-containing material by using a device (such as an air classifier) for classifying the crushed arsenic-containing material, and collecting a fraction with low arsenic content; wherein the rotational speed of a grading impeller of the device for grading the crushed arsenic-containing substances is 1100-2600 r/min (such as 1200 r/min, 1800 r/min or 2100 r/min); the low arsenic content fraction has an angle of repose of 50 ° to 52 ° (e.g., 50.6 °, 50.7 °, 50.8 °, 51.4 °, 51.5 °, 51.6 °, or 51.9 °), a degree of compression of 51% to 54% (e.g., 51.18%, 51.59%, 52.94%, 53.11%, 53.25%, 53.39%, or 53.67%), and an arsenic content of <0.5mg/kg (e.g., 0.43mg/kg, 0.44mg/kg, 0.46mg/kg, 0.48mg/kg, or 0.49 mg/kg).
Examples
The following examples are for the purpose of illustration only and are not intended to limit the scope of the present application.
The specific information of the raw materials and equipment used in the following examples is as follows:
stabilized whole fat rice bran was purchased from wayweight diligent fodder limited, county;
food superfine crusher: jieyana inc;
an airflow classifier: beijing collaborative innovation research institute.
The detection method adopted by the application is as follows:
protein content: GB5009.5-2016 food safety national standard food protein determination;
arsenic content: measuring total arsenic and inorganic arsenic in GB 5009.11-2014 food safety national standard food;
particle size measurement (dry method): measurement was performed with Malvern Autosizer 4700 light scattering;
the compressibility C is (ρ bt- ρ b)/ρ bt × 100%, where ρ bt and ρ b are the tap density and the bulk density, respectively;
tap density and bulk density: measured using a BT-1000 powder comprehensive characteristic tester (Dandongbott instruments Co., Ltd.);
angle of repose: the powder was allowed to fall naturally from a funnel of a certain height onto a horizontal plate using a BT-1000 powder comprehensive properties tester (dandongtou hitter instruments ltd) until no more sample was dropped from the funnel, and the angle between the cone formed and the horizontal plate was the angle of repose.
Preparation of defatted Rice bran
Sieving stabilized whole rice bran to control its particle size not more than 180 μm. Weighing the sieved stabilized whole fat rice bran, adding 95% ethanol to make the feed-liquid ratio 1:15(w/v), and defatting at 90 deg.C for 4 hr. After the treatment, the rice bran solids were separated from the ethanol using a suction filtration apparatus. And (3) carrying out rotary evaporation on the solid powder obtained by separation for 20min at 50 ℃ in a rotary evaporator to remove ethanol, thus obtaining the defatted rice bran, wherein the component contents are as follows: 25-35% of starch, 12-18% of protein, 0-8% of fat, 25-30% of dietary fiber, 0-12% of ash and 2-10% of water.
Example 1
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 4000 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 3.6 μm, D50 ═ 29.3 μm and D90 ═ 58.7 μm.
Separating with an air classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 1800 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 51.4 degrees and the compression degree reaches 53.25 percent, stopping classification, and collecting the obtained fine powder, namely a defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Example 2
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 r/min, the rotating speed of a grading impeller is 3000 r/min, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 4.3 μm, D50 ═ 36.1 μm and D90 ═ 70.9 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 1800 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 50.8 degrees and the compression degree reaches 53.11 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Example 3
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 4000 rpm, and the current of a fan is 6 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 3.5 μm, D50 ═ 29.1 μm and D90 ═ 56.9 μm.
Separating with an air classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 1800 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 51.5 degrees and the compression degree reaches 51.59 percent, stopping classification, and collecting the obtained fine powder, namely a defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Example 4
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 4000 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 3.6 μm, D50 ═ 29.3 μm and D90 ═ 58.7 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 1200 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 50.6 degrees and the compression degree reaches 52.94 percent, stopping classification, and collecting the obtained fine powder, namely a defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Example 5
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 4000 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 3.6 μm, D50 ═ 29.3 μm and D90 ═ 58.7 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 2100 r/min, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 51.6 degrees and the compression degree reaches 53.39 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Example 6
Firstly, an ultrafine grinder is adopted to crush defatted rice bran, the rotating speed of a main machine is 5000 revolutions per minute, the rotating speed of a grading impeller is 4300 revolutions per minute, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 2.9 μm, D50 ═ 24.0 μm and D90 ═ 53.1 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classifying motor at 2100 r/min, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 51.9 degrees and the compression degree reaches 53.67 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Example 7
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 2500 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 4.9 μm, D50 ═ 48.2 μm and D90 ═ 98.1 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 2100 r/min, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 50.7 degrees and the compression degree reaches 51.18 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 1
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 r/min, the rotating speed of a grading impeller is 2000 r/min, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 5.9 μm, D50 ═ 61.4 μm and D90 ═ 139.8 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 1800 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 49.7 degrees and the compression degree reaches 54.67 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 2
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 r/min, the rotating speed of a grading impeller is 3000 r/min, and the current of a fan is 6 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 5.5 μm, D50 ═ 55.7 μm and D90 ═ 127.1 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 1800 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 50.1 degrees and the compression degree reaches 50.97 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 3
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 r/min, the rotating speed of a grading impeller is 3000 r/min, and the current of a fan is 6 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 5.5 μm, D50 ═ 55.7 μm and D90 ═ 127.1 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 1500 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 49.8 degrees and the compression degree reaches 49.54 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 4
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 2500 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 4.9 μm, D50 ═ 48.2 μm and D90 ═ 98.1 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 1800 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 50.2 degrees and the compression degree reaches 50.92 percent, stopping classification, and collecting the obtained fine powder, namely a defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 5
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 r/min, the rotating speed of a grading impeller is 3000 r/min, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 4.3 μm, D50 ═ 36.1 μm and D90 ═ 70.9 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 800 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 49.2 degrees and the compression degree reaches 50.78 percent, stopping classification, and collecting the obtained fine powder, namely a defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 6
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 r/min, the rotating speed of a grading impeller is 3000 r/min, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 4.3 μm, D50 ═ 36.1 μm and D90 ═ 70.9 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor to be 1000 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 49.7 degrees and the compression degree reaches 51.27 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 7
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 4000 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 3.6 μm, D50 ═ 29.3 μm and D90 ═ 58.7 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 800 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 49.6 degrees and the compression degree reaches 51.09 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 8
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 4000 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 3.6 μm, D50 ═ 29.3 μm and D90 ═ 58.7 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor to be 1000 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 49.9 degrees and the compression degree reaches 51.93 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 9
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 4000 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 3.6 μm, D50 ═ 29.3 μm and D90 ═ 58.7 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 2800 r/min, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 51.8 degrees and the compression degree reaches 54.48 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 10
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 4000 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 3.6 μm, D50 ═ 29.3 μm and D90 ═ 58.7 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classifying motor at 3000 r/min, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 52 degrees and the compression degree reaches 55.18 percent, stopping classification, and collecting the obtained fine powder, namely a defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 11
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 r/min, the rotating speed of a grading impeller is 4200 r/min, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 3.1 μm, D50 ═ 25.3 μm and D90 ═ 54.7 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 3000 r/min, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 52.4 degrees and the compression degree reaches 55.57 percent, stopping classification, and collecting the obtained fine powder, namely a defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 12
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 rpm, the rotating speed of a grading impeller is 4500 rpm, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 2.4 μm, D50 ═ 22.1 μm and D90 ═ 50.9 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 2100 r/min, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 52.5 degrees and the compression degree reaches 53.80 percent, stopping classification, and collecting the obtained fine powder, namely a defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 13
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 revolutions per minute, the rotating speed of a grading impeller is 5000 revolutions per minute, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 1.9 μm, D50 ═ 18.9 μm and D90 ═ 49.3 μm.
Separating with an air classifier, fully contacting suspended powder with a rotary classifier impeller, setting the rotation speed of a classified motor at 1800 rpm, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 51.9 degrees and the compression degree reaches 53.77 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 14
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 revolutions per minute, the rotating speed of a grading impeller is 5000 revolutions per minute, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 1.9 μm, D50 ═ 18.9 μm and D90 ═ 49.3 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 2100 r/min, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 52.9 degrees and the compression degree reaches 53.70 percent, stopping classification, and collecting the obtained fine powder, namely the defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
Comparative example 15
Firstly, an ultrafine grinder is adopted to crush the degreased rice bran, the rotating speed of a main engine is 5000 revolutions per minute, the rotating speed of a grading impeller is 5000 revolutions per minute, and the current of a fan is 7 amperes. The particle size of the material (D10, D50 and D90) was measured and the milling was stopped until the particle size of the material reached D10 ═ 1.9 μm, D50 ═ 18.9 μm and D90 ═ 49.3 μm.
Separating with an airflow classifier, fully contacting suspended powder particles with a rotary classifier impeller, setting the rotation speed of a classified motor at 3000 r/min, detecting the repose angle and the compression degree of the fine powder collected by the classifier until the repose angle of the fine powder collected by the classifier reaches 50.3 degrees and the compression degree reaches 54.81 percent, stopping classification, and collecting the obtained fine powder, namely a defatted rice bran product with low arsenic content. And detecting the arsenic content and the protein content of the product, and calculating the yield.
The parameter settings of each example and comparative example are shown in table 1.
TABLE 1
Figure BDA0002351595820000211
Figure BDA0002351595820000221
The particle size (D10, D50, and D90) of the defatted rice bran after crushing and the measurement results of the arsenic content, angle of repose, degree of compression, protein content, and yield of the defatted rice bran product with low arsenic content obtained by classifying the crushed defatted rice bran in each of examples and comparative examples are shown in table 2.
TABLE 2
Figure BDA0002351595820000222
Figure BDA0002351595820000231
From the results of tables 1 and 2, it can be seen that by treating defatted rice bran using a pulverizer and an air classifier, when the particle size of the defatted rice bran after pulverization (D10, D50 and D90) and the angle of repose and the degree of compression of the defatted rice bran product after classification are within a certain range, the arsenic content of the defatted rice bran product is less than 0.5mg/kg, which meets the national standard.
Although exemplary embodiments of the inventions of the present application have been described above, those skilled in the art will be able to make modifications and improvements to the exemplary embodiments described herein without departing from the spirit and scope of the present application, and variations and equivalents resulting therefrom also fall within the scope of the present application.

Claims (10)

1. A method of reducing the arsenic content of an arsenic-containing species, comprising:
crushing the arsenic-containing material; and
classifying the crushed arsenic-containing substances, and collecting fractions with low arsenic content;
wherein the fraction has an angle of repose of from 50 ° to 52 °, preferably from 50.5 ° to 51.9 °; and
the degree of compression of the fractions is from 51% to 54%, preferably from 51.1% to 53.7%.
2. The method of claim 1, wherein
The particle size D10 of the crushed arsenic-containing substance is 2-5 μm, preferably 2.9-4.9 μm; and/or
The particle size D50 of the crushed arsenic-containing substance is 20-50 μm, preferably 24-49 μm; and/or
The particle size D90 of the crushed arsenic-containing substance is 50-110 μm, preferably 53-100 μm.
3. The method of claim 1 or 2, wherein
The equipment used to break up the arsenic species is selected from: mechanical crushers, jet mills, grinders and cryogenic crushers;
optionally, the host rotation speed of the equipment is 3000-7000 rpm, preferably 4000-6000 rpm; and/or
The grading impeller speed of the equipment is 2500-.
4. The method of any one of claims 1-3, wherein
The equipment for grading the crushed arsenic-containing substances is an airflow grader;
optionally, the grading impeller speed of the device for grading the crushed arsenic-containing substances is 1100-.
5. The method of any one of claims 1-4, further comprising stabilizing the arsenic-containing material prior to breaking the arsenic-containing material;
optionally, the stabilizing treatment is an extrusion treatment, a dry heat treatment, a wet heat treatment, an enzymatic treatment, a microwave treatment or an ultrasonic treatment, preferably an extrusion treatment.
6. The method according to any one of claims 1 to 5, wherein the arsenic-containing substance is an arsenic-containing food material, preferably an arsenic-containing rice food material.
7. The process according to any one of claims 1 to 5, wherein the arsenic-containing material is rice bran, floury, rice husk and/or brown rice.
8. A food material with a low arsenic content obtainable by the method of any one of claims 1 to 7.
9. The low arsenic food material of claim 8, wherein the low arsenic food material has an arsenic content of <0.5 mg/kg.
10. Use of the low arsenic food material of claim 8 for the preparation of a food product.
CN201911417573.3A 2019-12-31 2019-12-31 Method for reducing arsenic content of arsenic-containing substance and application Pending CN113115897A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1654123A (en) * 2004-02-13 2005-08-17 黑龙江省北大荒麦业有限责任公司 Process for the separation of dietary food fiber
DE102004010967A1 (en) * 2004-03-03 2005-10-13 Noack, Andreas, Dr. Multielemantar nanoculters and nanoscale multicomponent mineral and trace element preparations, as well as a process for the production of nanoscale multicomponents
JP2010089072A (en) * 2009-04-10 2010-04-22 Ryoko Lime Industry Co Ltd Method for stabilizing heavy metal contained in heavy metal-containing waste and stabilizer of heavy metal contained in heavy metal-containing waste
MD4298B1 (en) * 2013-02-14 2014-08-31 Institutul De Chimie Al Academiei De Ştiinţe A Moldovei Process for water treatment of ground and surface waters
CN105767835A (en) * 2014-12-24 2016-07-20 丰益(上海)生物技术研发中心有限公司 Coarse-cereal solid beverage and preparation method thereof
US20180079665A1 (en) * 2015-03-30 2018-03-22 Dexerials Corporation Water-Purifying Agent and Water Purification Method
CN109788780A (en) * 2016-08-18 2019-05-21 艾斯姆食品公司 For reducing the chelating agent and its correlation technique of tenor in food product
WO2019161079A1 (en) * 2018-02-16 2019-08-22 Axiom Foods, Inc. Agents for reducing metal content in food products and methods related thereto

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1654123A (en) * 2004-02-13 2005-08-17 黑龙江省北大荒麦业有限责任公司 Process for the separation of dietary food fiber
DE102004010967A1 (en) * 2004-03-03 2005-10-13 Noack, Andreas, Dr. Multielemantar nanoculters and nanoscale multicomponent mineral and trace element preparations, as well as a process for the production of nanoscale multicomponents
JP2010089072A (en) * 2009-04-10 2010-04-22 Ryoko Lime Industry Co Ltd Method for stabilizing heavy metal contained in heavy metal-containing waste and stabilizer of heavy metal contained in heavy metal-containing waste
MD4298B1 (en) * 2013-02-14 2014-08-31 Institutul De Chimie Al Academiei De Ştiinţe A Moldovei Process for water treatment of ground and surface waters
CN105767835A (en) * 2014-12-24 2016-07-20 丰益(上海)生物技术研发中心有限公司 Coarse-cereal solid beverage and preparation method thereof
US20180079665A1 (en) * 2015-03-30 2018-03-22 Dexerials Corporation Water-Purifying Agent and Water Purification Method
CN109788780A (en) * 2016-08-18 2019-05-21 艾斯姆食品公司 For reducing the chelating agent and its correlation technique of tenor in food product
US20190174803A1 (en) * 2016-08-18 2019-06-13 Axiom Foods, Inc. Chelating agents for reducing metal content in food products and methods related thereto
WO2019161079A1 (en) * 2018-02-16 2019-08-22 Axiom Foods, Inc. Agents for reducing metal content in food products and methods related thereto

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
何孟常等: "污染作物籽实中As 的分布及其结合形态初探", 应用生态学报, pages 626 *
王丰等: "污泥飞灰中重金属不同浸出方法比较及综合毒性评价", 环境科学, pages 292 *
鞠兴荣等: "米糠中砷、镉、铅分布规律的初探", 粮食与饲料工业, pages 5 *

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