Production process of insoluble dietary fiber with high water-holding capacity

Abstract

A production process of insoluble dietary fibers with high water-holding capacity comprises the following steps: step 1, cutting off bamboo leaves of moso bamboos, and peeling off bamboo pole skins of the moso bamboos to obtain a moso bamboo raw material; step 2, screening out qualified raw materials from the moso bamboo raw materials, cutting the qualified raw materials into moso bamboo chips by using a crusher, soaking the moso bamboo chips in circulating water for more than 2 hours, and then washing the moso bamboo chips; 3, blanching the moso bamboo chips with boiled water for more than 1 hour, wherein the boiled water is generated through circulating water; step 4, putting the moso bamboo chips blanched with boiled water into a pulping machine for pulping, and sieving with a 10mm sieve plate after pulping, so as to obtain moso bamboo pulp; according to the production process of the insoluble dietary fiber with high water-holding capacity, the insoluble dietary fiber with proper length obtained through research can be directly produced, the production process is green, environment-friendly and free of additives, and the length of the insoluble dietary fiber produced according to the process is within the range of 40-50 microns; the digestion aiding level of the dietary fibers can be guaranteed, the high water binding capacity can be kept, and the water binding capacity is larger than 30 g / g and is far higher than the level of 8-10 g / g of domestic like products. The production process is simple and convenient for large-scale production.

Description

Technical Field

[0001] The invention belongs to the technical field of food additives, and in particular relates to a production process of insoluble dietary fiber with high water holding capacity. Background Art

[0002] Dietary fiber is a type of carbohydrate that cannot be digested by the human body, including soluble dietary fiber and insoluble dietary fiber. Insoluble dietary fiber plays an important role in promoting good digestion and excretion of solid waste. The reason is that the chemical structure of dietary fiber contains many hydrophilic groups, so it has strong water retention and thus strong water absorption and swelling ability. The high water retention of dietary fiber is conducive to making the digested food in the intestine larger and softer, reducing intestinal pressure, promoting intestinal peristalsis, speeding up defecation, reducing the residence time of harmful substances in the intestine, effectively preventing constipation and reducing the risk of colorectal cancer. Dietary fiber can also regulate blood sugar, reduce the risk of diabetes, reduce the absorption of fat during digestion, thereby reducing the levels of cholesterol and triglycerides in the blood, preventing cardiovascular and cerebrovascular diseases such as hypertension, and also reducing the pressure on the urinary system. While preventing constipation and reducing the risk of colorectal cancer, it can also relieve the symptoms of urinary system diseases such as cystitis, bladder stones and kidney stones. As food health is increasingly valued, the processing and application of insoluble dietary fiber has begun to receive extensive research, that is, how to use lower-cost, cheaper raw materials to provide pure natural dietary fiber with higher water retention.

[0003] Studies have shown that dietary fiber length has a great influence on water holding capacity. When the dietary fiber length is in the range of 1100-550 microns, as the dietary fiber length decreases, the hydrophilic groups are exposed, resulting in a gradual increase in water holding capacity. When it is below 550 microns, the water holding capacity tends to decrease. However, from the perspective of aiding digestion, dietary fiber lengths less than 100 microns are more helpful for human digestion. Therefore, it is necessary to find the most suitable dietary fiber length range based on the balance between aiding digestion and strong water holding capacity, and design a production process for insoluble dietary fiber suitable for production in this length range. Summary of the invention

[0004] Based on the above-mentioned deficiencies of the prior art, the present invention provides a production process of insoluble dietary fiber with high water holding capacity, which can utilize bamboo, an important crop in Zhejiang Province, to produce pure natural green additive-free, digestive-aiding, and water-holding insoluble dietary fiber.

[0005] A production process of an insoluble dietary fiber with high water holding capacity, characterized in that the production process comprises the following steps:

[0006] Step 1, cutting off bamboo leaves of moso bamboo, peeling off bamboo stalk skin, and obtaining moso bamboo raw material;

[0007] Step 2: Select qualified raw materials from the bamboo raw materials, cut them into bamboo slices using a crusher, soak them in circulating water for more than 2 hours, and then rinse them clean;

[0008] Step 3, blanching the bamboo slices with boiling water for more than 1 hour, wherein the boiling water is produced by circulating water;

[0009] Step 4, putting the bamboo pieces blanched in boiling water into a pulping machine for pulping, and passing through a 10 mm sieve plate after pulping to obtain bamboo pulp;

[0010] Step 5, putting the bamboo slurry into a food-grade colloid mill with a fineness of less than or equal to 50 meshes for coarse grinding, passing through a 50-mesh sieve after coarse grinding, and re-grinding the unscreened bamboo slurry to obtain coarsely ground bamboo slurry;

[0011] Step 6, putting the coarsely ground bamboo pulp into a food-grade pulping machine with a fineness of 270 meshes for fine grinding to obtain finely ground bamboo pulp;

[0012] Step 7: using a high-pressure homogenizer to perform high-pressure homogenization on the finely ground bamboo slurry, and then dehydrating it, and then using a freeze dryer to perform freeze drying to obtain an insoluble dietary fiber dry powder;

[0013] Step 8: Use a food grinder with a fineness of 270 meshes to perform secondary grinding on the insoluble dietary fiber dry powder to finally obtain insoluble dietary fiber.

[0014] Preferably, the bamboo in step 1 is fresh bamboo that is 3-5 years old.

[0015] Preferably, in step 2, the length of the bamboo pieces is less than 3 cm.

[0016] Preferably, the beating time in step 4 is 1-2 hours.

[0017] Preferably, in step 7, the homogenization pressure is 120Mpa-150Mpa, and the homogenization time is 0.5-1 hour.

[0018] The production process of the insoluble dietary fiber with high water holding capacity provided by the present invention can directly produce the insoluble dietary fiber with suitable length obtained through research, and the production process is green and environmentally friendly without additives. The length of the insoluble dietary fiber produced according to the process is between 40 and 50 microns, which can not only ensure the digestion level of the dietary fiber, but also maintain a high water holding capacity, which is greater than 30 g / g, much higher than the level of 8-10 g / g of similar domestic products. The production process is simple and convenient for large-scale production. DETAILED DESCRIPTION

[0019] In order to make the technical content of the present invention more easily understood, the technical solution of the present invention is described in detail below in conjunction with embodiments.

[0020] Example 1

[0021] In Example 1, a production process of an insoluble dietary fiber with high water holding capacity is provided, and the production process is performed according to the following steps:

[0022] First, fresh bamboo grown for 3-5 years is selected as the bamboo raw material, and then the bamboo raw material is processed, the bamboo leaves not used in the production of dietary fiber are cut off, and the bamboo stalk skin is peeled off to obtain the bamboo raw material, that is, the bamboo stalk with rich dietary fiber content, less impurities, easy processing and moderate fiber length, and then the next step is carried out.

[0023] Remove impurities and waste from the bamboo raw materials obtained in the previous step, screen out qualified raw materials, use a food-grade crusher to cut into bamboo pieces with a length of about 2 cm and not more than 3 cm, soak them in circulating water for more than 2 hours, then rinse them and proceed to the next step.

[0024] In this embodiment, the bamboo pieces are blanched with boiling water produced by circulating water for 2 hours. At this time, all the preliminary preparations for the bamboo raw materials have been completed, and then the next step is performed.

[0025] Start to pulp the bamboo raw materials. The process of this step is similar to the pulping process of bamboo fiber pulp, that is, the bamboo slices blanched in boiling water are put into a pulping machine for pulping for 2 hours, and then passed through a 10mm sieve plate to obtain bamboo slurry. The bamboo raw materials that have not passed the sieve plate are put into the pulping machine for re-pulping, and the bamboo slurry is subsequently refined.

[0026] The bamboo pulp is put into a food-grade colloid mill with a fineness of 50 meshes for coarse grinding, and after coarse grinding, the bamboo pulp that has not been screened is put into the food-grade colloid mill for coarse grinding again to obtain coarsely ground bamboo pulp. Then the coarsely ground bamboo pulp is put into a food-grade pulping machine with a fineness of 270 meshes for fine grinding to obtain finely ground bamboo pulp.

[0027] Then, a high-pressure homogenizer is used to perform high-pressure homogenization on the finely ground bamboo pulp, with a homogenization pressure of 150Mpa and a homogenization time of 1 hour, and then dehydrated, and then freeze-dried using a freeze dryer to obtain an insoluble dietary fiber dry powder. At this time, after coarse grinding with a food-grade colloid mill with a fineness of 50 mesh, fine grinding with a food-grade pulping machine with a fineness of 270 mesh, and high-pressure homogenization, the length of the insoluble dietary fiber is controlled within the most ideal range of 40-50 microns, and the technical effects mentioned in the summary of the invention can be achieved.

[0028] Finally, the insoluble dietary fiber dry powder was crushed twice using a food grinder with a fineness of 270 meshes, and then sterilized by ultraviolet light to finally obtain the insoluble dietary fiber.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A production process for insoluble dietary fiber with high water holding capacity, characterized in that: The production process comprises the following steps: Step 1, cutting off bamboo leaves of moso bamboo, peeling off bamboo stalk skin, and obtaining moso bamboo raw material; Step 2: Select qualified raw materials from the bamboo raw materials, cut them into bamboo slices using a crusher, soak them in circulating water for more than 2 hours, and then rinse them clean; Step 3, blanching the bamboo slices with boiling water for more than 1 hour, wherein the boiling water is produced by circulating water; Step 4, putting the bamboo pieces blanched in boiling water into a pulping machine for pulping, and passing through a 10 mm sieve plate after pulping to obtain bamboo pulp; Step 5, putting the bamboo slurry into a food-grade colloid mill with a fineness of less than or equal to 50 meshes for coarse grinding, passing through a 50-mesh sieve after coarse grinding, and re-grinding the unscreened bamboo slurry to obtain coarsely ground bamboo slurry; Step 6, putting the coarsely ground bamboo pulp into a food-grade pulping machine with a fineness of 270 meshes for fine grinding to obtain finely ground bamboo pulp; Step 7: using a high-pressure homogenizer to perform high-pressure homogenization on the finely ground bamboo slurry, and then dehydrating it, and then using a freeze dryer to perform freeze drying to obtain an insoluble dietary fiber dry powder; Step 8: Use a food grinder with a fineness of 270 meshes to perform secondary grinding on the insoluble dietary fiber dry powder to finally obtain insoluble dietary fiber.

2. The production process of the insoluble dietary fiber with high water holding capacity according to claim 1, characterized in that: The bamboo in step 1 is fresh bamboo that has grown for 3-5 years.

3. The production process of the insoluble dietary fiber with high water holding capacity according to claim 1, characterized in that: In step 2, the length of the bamboo slice is less than 3 cm.

4. The production process of the insoluble dietary fiber with high water holding capacity according to claim 1, characterized in that: The beating time in step 4 is 1-2 hours.

5. The production process of the insoluble dietary fiber with high water holding capacity according to claim 1, characterized in that: In step 7, the homogenization pressure is 120Mpa-150Mpa, and the homogenization time is 0.5-1 hour.