Soy dietary fiber extraction technology

Soy dietary fiber refers to the insoluble carbohydrates in soybeans. The main components are non-starch polysaccharides, including cellulose, mixed bond β-glucose, hemicellulose, pectin, gum, xylan, mannose, etc., which cannot be It is the general name for high molecular sugars digested by human digestive enzymes.

Dietary fiber has a wide range of pharmacological effects. It can prevent the occurrence of high fat and high sugar, stimulate intestinal peristalsis, protect the gastrointestinal tract, increase fecal volume and frequency of defecation, treat diarrhea in infants and young children, and prevent postoperative infections. As people pay more attention to dietary health, more and more dietary fiber health foods are being researched and developed. Dietary fiber will have good development and application prospects.

     Function of soybean dietary fiber

     1. Health benefits

     Although dietary fiber cannot provide any nutrients to the human body, it has important physiological effects on the human body.

     (1) Reduce the cholesterol content in the blood in the body and prevent arteriosclerosis and coronary heart disease;

     (2) Improve blood sugar production response, promote blood sugar and insulin to maintain normal levels, and have a significant effect in preventing and treating diabetes; foreign scholars have found that dietary fiber can effectively control the rise in blood sugar after meals and improve glucose tolerance, among which soluble dietary fiber is more effective than insoluble dietary fiber. Dietary fiber, such as soluble dietary fiber, has strong water-holding capacity and reduces the absorption rate of glucose, which has attracted widespread attention in the prevention and auxiliary treatment of diabetes.

     (3) Improve large intestine function and promote normal gastrointestinal peristalsis, thereby preventing constipation and colon cancer;

     (4) In addition, dietary fiber can also increase stomach fullness, reduce food intake, and have the effect of losing weight.

     2. Food raw materials

     Soybean dietary fiber can be used as a food ingredient, as a stabilizer to thicken, extend the shelf life of food, and as a freezing stabilizer. The processed soybean dietary fiber can enhance the structural properties of dough and is an ideal choice for high-end bread baking. Ideal natural additive. In addition, soy dietary fiber can be used in low-calorie cereal foods such as pastries, biscuits, and puffed foods, and can also be used in various health drinks.

     Research progress on soybean dietary fiber extraction technology

     At present, modern technologies such as extrusion molding technology, membrane separation technology, fermentation engineering technology, enzymatic reaction engineering technology, bioprocessing technology, modern food separation technology, high-pressure processing technology, microcapsule granulation technology and advanced sterilization technology are actively adopted at home and abroad. High and new technology improves the use value of soybean products. It not only greatly broadens the scope of deep processing and utilization of soybeans and improves comprehensive development capabilities, but also maintains the nutritional content of soybeans during the processing. There are many methods for extracting soybean dietary fiber, including chemical methods, enzymatic hydrolysis methods, microbial fermentation methods, microwave-assisted extraction methods, and multi-method combinations.

     1. Chemical method

     Chemical extraction of soybean dietary fiber mainly refers to the combination of acid hydrolysis and alkaline hydrolysis. Due to different raw materials for extracting dietary fiber, the concentration and action time of acidolysis and alkaline hydrolysis used are different, and the yield of soybean dietary fiber is also different. This requires the application of orthogonal experimental methods to estimate the optimal extraction process.

     2. Enzymatic hydrolysis

     The key technology for extracting soybean dietary fiber through enzymatic hydrolysis lies in the enzymatic hydrolysis reaction. Compared with chemical methods, enzymatic hydrolysis method has the highest yield of extracting dietary fiber from soybeans.

     It is worth noting that in the process of extracting soybean dietary fiber by enzymatic hydrolysis, extraction temperature, solid-liquid ratio and extraction time are three important factors that affect the extraction rate of water-soluble dietary fiber from bean dregs. Among them, extraction temperature is the main factor, followed by time, and thirdly the solid-liquid ratio.

     3. Microbial fermentation method

     The physiological activity of dietary fiber produced by microbial fermentation is significantly enhanced and it is a high-quality dietary fiber. Its production process is simple, its cost is low, and it is easy to realize industrial production.

     4. Multiple methods combined with extraction process

     The acidic hydrolysis and alkaline hydrolysis of chemical methods must break the glycosidic bond under appropriate pH value, temperature and time, the degree of polymerization decreases, and the dietary fiber completes the sexual change from IDF to SDF. And in alkaline solutions, even under very mild conditions, both cellulose and hemicellulose undergo peeling reactions, that is, the sugar groups with reducing ends fall off one by one until the end groups are converted into metaglycan acid groups. Until the stable reaction, the fallen sugar groups are finally converted into mutated sugar acids in the solution and exist in the solution in the form of their sodium salts.

     Although both reduce the degree of polymerization of dietary fiber, the increase in the amount of sodium salt of mutosaccharide restricts the conversion of IDF to SDF, making the SDF yield of alkali degradation worse than that of acid degradation. In comparison, the enzymatic hydrolysis method has the characteristics of high catalytic rate, no side reactions, mild operating conditions, simple equipment requirements, and can save coal and electricity energy. However, due to the strong specificity of the reaction, it has relatively high substrate requirements. High, the effect yield is variable. Therefore, multiple methods need to be used in conjunction to maximize the strengths and avoid weaknesses, so as to maximize the extraction efficiency of soybean dietary fiber.

Implications for dietary supplement manufacturers

Dietary supplement manufacturers play an important role in the improvement and development of supplements, and people take a variety of supplements throughout their lives. So what implications does soy fiber extraction technology bring to dietary fiber supplement manufacturers?

1. Security

The extraction technology of soybean dietary fiber must first ensure safety for human health. The extraction technology cannot contain any chemical components, otherwise it will affect the quality of dietary fiber supplements. The above extraction technologies, enzymatic hydrolysis and microbial fermentation, are safe. The degree of health is relatively high, and manufacturers can learn from these two extraction technologies to achieve mass production of supplements.

2. Extraction costs

The development of any enterprise must make money. Too high costs are not conducive to the healthy development of the enterprise. If you want to produce high-quality and low-priced soy dietary fiber supplements, it is very suitable to work on the extraction technology. Give good products to Only consumers can be recognized.

     In summary, dietary fiber is of great significance to human health. People should increase their intake of dietary fiber in their daily lives and pay attention to the intake of cereals, beans, vegetables and fruits, etc., which is important for the prevention of obesity, colon cancer, and heart disease. Cerebrovascular disease has far-reaching implications. Therefore, whether from the international market or the domestic market, soy dietary fiber has great development prospects. Researchers are actively using research matrices rich in soybean dietary fiber such as bean dregs to continuously optimize the extraction process in order to improve the extraction efficiency of soluble soybean dietary fiber. This can not only solve the environmental problems and commercial problems caused by substrates such as bean dregs, but also drive the development of related industries and promote the research and development of dietary fiber health foods, which has good development and application prospects.