CN101999728B - Production method of microwave drying instant red date powder - Google Patents

Abstract

The invention discloses microwave drying instant red date powder and a production method thereof. The components of instant red date powder comprise red dates and a drying auxiliary agent. The production method comprises the steps of: removing skins of the leached red data juice, removing kernels, carrying out enzymolysis and ultramicro crushing, and then mixing with the drying auxiliary agent, homogenizing, spreading and then microwave-drying, and finally packaging the red date powder into the finished product of the instant red date powder. The instant red date powder drinks have the advantages of completed preserved nutrients, good taste and mouthfeel and better solubility, have multiple nutrition and health protection functions of the red dates, are convenient for storage and carrying, are good in dissolving ability, achieve the effect of an instant product, and are more convenient for eating.

Description

A kind of production method of microwave-dried instant jujube powder

technical field

The invention relates to an instant red date powder and a production method thereof, in particular to a microwave-dried instant red date powder and a production method thereof. the

Background technique

In recent years, with the continuous improvement of people's living standards, great changes have taken place in people's diet structure. People pay more and more attention to health food and the therapeutic effect of food, and the public's demand for health food is increasing rapidly. As a traditional medicinal and edible fruit, jujube is rich in nutrition and has good edible value, nutritional value and medicinal value. According to statistics, jujube contains a variety of active ingredients, such as polysaccharides, vitamin A, B1, B2, C, E, P and niacin, known as "natural vitamin pills", are supplements for human anti-aging; minerals and trace elements in jujube include: calcium, phosphorus, iron, potassium, manganese, selenium, etc.; flavonoids, organic acid, triterpenoids, dammarane-type saponins, etc.; in addition, jujube has significant medicinal value, such as invigorating the stomach and nourishing the spleen, nourishing the middle and replenishing qi, curing cough and moistening the lung, promoting body fluid and moistening the throat, calming and sleeping, treating chronic mental illness, Relieve drug poison, enhance immunity, enhance muscle strength, adjust blood and nourish blood, lower cholesterol, prevent gallstones, resist mutation and anti-tumor, prevent and treat cardiovascular disease, lower blood fat, ease arteriosclerosis, anti-allergic, detoxify and protect liver, nourish blood and beautify skin , anti-allergic and other effects, so red dates are more and more popular. the

But, for a long time, jujube is mainly used as fresh food and dried, and the product is single, and the added value is very low. Therefore, vigorously developing and researching jujube products has a broad market prospect and high economic value and social benefits. the

In recent years, with the continuous improvement of food processing level, some new jujube products have been gradually developed, such as jujube vinegar, jujube lactic acid bacteria beverage, jujube compound beverage, jujube solid beverage, jujube wine, jujube health tea beverage, etc. However, due to various reasons, there are not many problems, for example, due to the special texture characteristics of jujube itself: high sugar content, especially extremely high monosaccharide content, low moisture content, resulting in increased viscosity and low glass transition temperature Therefore, in the production process, the drying and juicing process is very difficult, which is not conducive to the large-scale production of other fruit and vegetable products with mature processing methods and mechanical equipment; in addition, because the current machinery for processing red dates is relatively backward, processing The equipment cannot meet the needs of jujube industrial production. Therefore, after the jujube is harvested, it cannot be processed in time, but a large amount of rot and deterioration, resulting in serious waste. It also seriously hurts the production enthusiasm of jujube farmers in jujube areas, resulting in a situation of high yield but not good harvest for many years , do not take advantage of the economic and social development of the jujube district. the

Contents of the invention

The technical problem to be solved by the present invention is to provide a microwave-dried instant jujube powder and a production method thereof, which process the jujube into powder, which is beneficial to preservation and transportation, and is easy to carry. In addition, no mechanical equipment is needed in the processing process. That is, the red dates after harvest can be processed in time, thereby reducing the rot and deterioration of a large amount of red dates because they cannot be processed in time, and reducing waste. the

To achieve the above object, the present invention also provides a production method of microwave-dried instant jujube powder, comprising the following steps:

(1) Take fresh red dates, wash, drain, remove pits and bake to make red date juice or red date pulp;

(2) adding a drying agent to the jujube juice or jujube pulp formed in step (1), and then transferring to a high-pressure homogenizer for homogenization to form a feed liquid;

(3) Lay the material liquid obtained in the step (2) with a thickness of 2 to 4 mm, then perform microwave treatment, and finally vacuum pack. the

As a preferred embodiment of the present invention, the preparation method of jujube juice is as follows: after the jujube is broken, add pectin compound enzyme according to the enzyme amount of 320uL/g, add water according to the water amount of 5mL/g, and then, at a temperature of 35 Enzymolysis at ℃ for 1 hour, followed by leaching for 120s at microwave power of 540W or leaching for 30min at ultrasonic power of 125W and temperature of 50℃, and finally filtering and concentrating under reduced pressure;

As a preferred embodiment of the present invention, the preparation method of jujube pulp is as follows: after baking, soak in water at 60°C for 1 hour according to the amount of water added at 8mL/g, then soften and pretreat for 2 minutes at a microwave power of 720W; then pour Crushing and beating in the tissue masher, peeling and removing the core with a sieve with an aperture of 1mm to obtain red date meat, and then beating at a speed of 12000r/min through a high-speed tissue masher; Enzyme-thick pulp, incubating at 45°C for 1 hour, and finally pulverizing 3 times in a colloid mill with a gap of 10 μm. the

As a preferred embodiment of the present invention, a drying aid is added to the red date powder, and the weight ratio of the red date powder to the drying aid is 5:5. the

As a preferred embodiment of the present invention, the drying aid is maltodextrin;

As a preferred embodiment of the present invention, the drying aid includes maltodextrin, soybean protein isolate, dextrin, β-cyclodextrin, and soluble starch, wherein the soluble solids in jujube juice are mixed with maltodextrin, soybean The weight ratio of protein isolate, dextrin, β-cyclodextrin, and soluble starch is 5:3:1.25:0.5:0.15:0.1;

As a preferred embodiment of the present invention, the drying aid includes maltodextrin, β-cyclodextrin, soybean protein isolate, soluble starch, and lecithin, wherein the total solids in jujube juice are related to maltodextrin, β-cyclodextrin -The weight ratio of cyclodextrin, soy protein isolate, soluble starch, and lecithin is 5:3.325:0.75:0.125:0.65:0.15;

The microwave-dried instant red date powder and the production method thereof of the present invention have at least the following advantages: the instant red date powder solid beverage prepared by the present invention retains complete nutritional components, has a good taste and flavor, has good instant solubility, is short in time consumption, and low in energy consumption. The powder has high quality and good economic benefits. Moreover, it is easy to store, easy to carry, good in brewing ability, ready to drink, and more convenient to eat. the

Detailed ways

Example 1

The microwave-dried instant jujube powder of the present invention, wherein the weight ratio of soluble solids in jujube juice to maltodextrin is 5:5. the

The production method of the instant red date powder of microwave drying of the present invention comprises the following steps:

(1) Juice extraction: After fresh red dates are washed, drained, pitted, baked, and crushed, the diameter of the pulp is 2mm, then, add 320uL/g pectin compound enzyme and 5mL/g water, at a temperature of 35°C enzymatic hydrolysis for 1 hour under the condition of microwave power of 540W for 120s or ultrasonic power of 125W and temperature of 50°C for 30min to obtain jujube juice, and finally filtered and concentrated under reduced pressure to form Jujube juice with a soluble solid content of 40%;

(2) Deployment: Add maltodextrin to the jujube juice concentrated in step (1), the weight ratio of maltodextrin and soluble solids in jujube juice is 5:5, and then transfer to a high-pressure homogenizer , homogenized twice under the condition of a pressure of 25MPa to form a feed liquid;

(3) Microwave drying: lay the material liquid formed in step (2), the thickness of the material is 2mm, and then microwave treatment 30 times, wherein the microwave power is 720W, each microwave treatment is 30 seconds, and the interval is 60 seconds;

(4) vacuum-pack the red date powder dried in step (3) by microwave. the

Example 2

The microwave-dried instant jujube powder of the present invention, wherein the weight ratio of soluble solids in jujube juice: maltodextrin: soybean protein isolate: dextrin: β-cyclodextrin: soluble starch is 5: 3: 1.25: 0.5: 0.15 : 0.1. the

The production method of the instant red date powder of microwave drying of the present invention comprises the following steps:

(1) Juice extraction: After fresh red dates are washed, drained, pitted, baked, and crushed, the diameter of the pulp is 2mm, then, add 320uL/g pectin compound enzyme and 5mL/g water, at a temperature of 35°C enzymatic hydrolysis for 1 hour under the condition of microwave power of 540W for 120s or ultrasonic power of 125W and temperature of 50°C for 30min to obtain jujube juice, and finally filtered and concentrated under reduced pressure to form Jujube juice with a soluble solid content of 40%;

(2) Deployment: Add maltodextrin, soybean protein isolate, dextrin, β-cyclodextrin, and soluble starch to the jujube juice concentrated in step (1), wherein the soluble solids in the jujube juice, maltodextrin , soybean protein isolate, maltodextrin, β-cyclodextrin, and soluble starch in a weight ratio of 5:3:1.25:0.5:0.15:0.1. Under the same conditions, homogenize twice to form a feed liquid;

(3) Microwave drying: lay the material liquid formed in step (2), the thickness of the material is 2mm, and then microwave treatment 30 times, wherein the microwave power is 720W, each microwave treatment is 30 seconds, and the interval is 60 seconds;

(4) vacuum-pack the red date powder dried in step (3) by microwave. the

Example 3

In the microwave-dried instant jujube powder of the present invention, the weight ratio of total solids in jujube juice to maltodextrin is 5:5. the

The production method of the instant red date powder of microwave drying of the present invention comprises the following steps:

(1) Pulping: Take fresh red dates, wash, drain, and bake, soak in water at 60°C for 1 hour according to the amount of water added at 8 mL/g, and then soften and pretreat them under microwave power of 720W for 2 minutes; then pour Put it into a tissue masher to crush and make an oar, then use a sieve with an aperture of 1mm to peel and remove the core to obtain the red date meat, and then through the high-speed tissue masher rotating speed under 12000r/min for beating; 360uL/g, after heat preservation and enzymolysis at 45°C for 1h, pulverize 3 times in a colloid mill with a gap of 10μm to obtain jujube pulp with a total solid content of 20%;

(2) Deployment: Add maltodextrin to the jujube pulp obtained in step (1), the weight ratio of the maltodextrin to the total solids in the jujube pulp is 5:5, after mixing, transfer to a high-pressure homogenizer , homogenized twice under the condition of a pressure of 25MPa to form a feed liquid;

(3) microwave drying: laying the material liquid formed in step (2), the thickness of the laying material is 4mm, then microwave treatment 60 times, wherein, the microwave power is 360W, every microwave treatment is 10 seconds, intermittent 60 seconds;

(4) vacuum-pack the red date powder dried in step (3) by microwave. the

Example 4

The microwave-dried instant red date powder of the present invention, wherein, the weight ratio of the solid matter in the red date juice to maltodextrin, beta-cyclodextrin, soybean protein isolate, soluble starch, and lecithin is: 5: 3.325: 0.75: 0.125: 0.65:0.15. the

The production method of the instant red date powder of microwave drying of the present invention comprises the following steps:

(1) Pulping: Take fresh red dates, wash, drain, and bake, soak in water at 60°C for 1 hour according to the amount of water added at 8 mL/g, and then soften and pretreat them under microwave power of 720W for 2 minutes; then pour Put it into a tissue masher for crushing and beating, then use a sieve with an aperture of 1mm to peel and remove the core to obtain red date meat, and then go through a high-speed tissue masher for beating at a speed of 12000r/min; /g, after heat preservation and enzymatic hydrolysis at 45°C for 1h, pulverize 3 times in a colloid mill with a gap of 10 μm to obtain jujube pulp with a total solid content of 20%;

(2) Deployment: Add maltodextrin, β-cyclodextrin, soybean protein isolate, soluble starch, and lecithin to the jujube pulp formed in step (1), wherein the total solids in the jujube pulp and maltodextrin , β-cyclodextrin, soybean protein isolate, soluble starch, and lecithin in a weight ratio of 5: 3.325: 0.75: 0.125: 0.65: 0.15. After mixing, they are transferred to a high-pressure homogenizer. Under the same conditions, homogenize twice to form a feed liquid;

(3) Microwave drying: laying the feed liquid formed in step (2), the thickness of the laying material is 4mm, and then microwave treatment, wherein the microwave power is 360W, every microwave treatment is 10 seconds, and the interval is 60 seconds, and the total time is 10 minutes;

(4) vacuum-pack the red date powder dried in step (3) by microwave. the

The instant jujube powder produced by the method of the present invention is rich in protein, fat, functional polysaccharide carotene, vitamin B, vitamin C, vitamin P and functional nutrients such as calcium, phosphorus, iron, magnesium, cGMP and cAMP, wherein vitamin The content of C and vitamin P is among the best in fruits; among them, cGMP and cAMP contained in red dates are essential components of human cell metabolism, which can enhance muscle strength, eliminate fatigue, dilate blood vessels, increase myocardial contractility, and improve myocardial nutrition. It has a good effect on preventing cardiovascular system diseases. the

The maltodextrin contained in the jujube powder of the present invention has good solubility and low hygroscopicity, and is easy to be made into powder. Therefore, under the premise of not affecting the solubility of jujube powder, it can also reduce the moisture absorption of jujube powder, thereby increasing the storability of jujube powder; in addition, maltodextrin has better rheology, is convenient for storage, and is easy to mix evenly , strong film-forming properties and foam stability, thus endowing jujube powder with a certain particle shape and viscosity, which can maintain the fragrance persistence of jujube powder, keep the quality of flavor unchanged for a long time, increase taste and durability, and highlight the unique aroma and taste of jujube flavor Furthermore, maltodextrin is easy to digest and absorb, and is suitable as a low-calorie curative food for patients with coronary heart disease, obesity, sclerosis, etc., thereby increasing the nutritional and health care functions of red date powder. the

The β-cyclodextrin contained in the jujube powder of the present invention has a special hydrophobic cavity and can form a complex with hydrophobic functional components in the jujube, such as jujube pigment and Vp, thereby protecting the pigment and functional properties of the jujube. Nutrients have the effect of protection, stabilization, anti-oxidation and slow release of effective functional ingredients. the

Soybean protein isolate contained in jujube powder of the present invention is a kind of surfactant, and it can reduce the surface tension of water and oil, and can reduce the surface tension of water and air again, is easy to form stable emulsion, thereby has increased jujube powder Solubility and stability in hot water improve the washing solubility of red date powder; in addition, soybean protein isolate can replace part of the protein in the diet, which not only reduces the intake of cholesterol and saturated fat, but also achieves the nutritional intake. Balanced, solves the problem of low protein content in jujube powder, and at the same time improves the nutritional structure of jujube powder; at the same time, soybean protein isolate can prevent urinary calcium loss, promote bone health, reduce the chance of suffering from osteoporosis, and effectively reduce the risk of osteoporosis. The content of total cholesterol and low-density lipoprotein cholesterol in human blood can reduce the risk of heart disease, thereby greatly improving the nutritional value of jujube powder. the

Compared with the current deep processing production method of jujube, the present invention is simple, easy to operate, short in time consumption, low in energy consumption, and low in one-time investment in equipment. agent, can significantly improve the nutritional value of jujube powder. It can be seen that the present invention has broad application prospects. the

The above is only one embodiment of the present invention, not all or the only embodiment. Any equivalent transformation of the technical solution of the present invention adopted by those of ordinary skill in the art by reading the description of the present invention is the right of the present invention. covered by the requirements. the

Claims (3)

1. the production method of the instant red date powder of a microwave drying is characterized in that: may further comprise the steps:

(1) gets new fresh date, through washing, drain, making jujube juice or red date slurry after the stoning, baking;

(2) add drying aid in the jujube juice that forms to step (1) or the red date slurry, then be passed to homogeneous in the high pressure homogenizer, form feed liquid; Wherein said drying aid is maltodextrin, beta-schardinger dextrin-, soybean protein isolate, soluble starch, and lecithin, wherein, total solid content and maltodextrin, beta-schardinger dextrin-in jujube juice or the red date slurry, soybean protein isolate, soluble starch, and the weight ratio of lecithin is 5:3.325:0.75:0.125:0.65:0.15;

(3) the feed liquid bed board that step (2) is obtained, layer thickness are 2 ~ 4mm, then carry out microwave treatment, last vacuum-packed getting final product.

2. the production method of the instant red date powder of microwave drying as claimed in claim 1, it is characterized in that: the preparation method of jujube juice is: after the baking that red date is broken, then being that 320 μ L/g add pectin compound enzyme according to enzyme concentration, is that 5mL/g adds entry according to amount of water, then, be 35 ℃ of lower enzymolysis 1h in temperature, then, be that lixiviate 120s or ultrasonic power are that 125W, temperature are under 50 ℃ under the 540W at microwave power, lixiviate 30min, finally by filtration, reduced pressure concentration gets final product.

3. the production method of the instant red date powder of microwave drying as claimed in claim 1, it is characterized in that: the preparation method of red date slurry is: after the baking, being 8mL/g by amount of water, soaking 1h in 60 ℃ water, is softening preliminary treatment 2min under the 720W at microwave power again; Then pouring in the tissue mashing machine broken, making beating into, is that the stoning of peeling of the screen cloth of 1mm obtains red date meat with the aperture, pulls an oar under 12000r/min through high-speed tissue mashing machine's rotating speed again; Follow again, according to enzyme concentration be 360 μ L/g with the pulp enzyme after, at 45 ℃ of lower insulation enzymolysis 1h, be to pulverize under the 10 μ m to get final product for 3 times at last in the colloid mill gap.