阅读说明：本技术 一种整豆灭酶的豆浆加工方法 (Soybean milk processing method for inactivating enzyme of whole soybean ) 是由 陈宝国 孟海鹏 李小俊 张国川 潘建江 于 2020-07-09 设计创作，主要内容包括：本发明公开了一种整豆灭酶的豆浆加工方法,包括整豆灭酶、湿豆去皮、剪切精磨、连续两次高压均质、冷却后再次均质等步骤,在整豆灭酶中,将泡好的豆子转移至灭酶装置,控制灭酶温度为93～98℃,将豆子螺旋推进,并用93～98℃的水喷冲至悬浮翻腾状态,持续推进灭酶15～20分钟后,将豆子从灭酶装置输出。本发明一种整豆灭酶的豆浆加工方法,灭酶时,将螺旋连续推进与喷冲相结合,可以使豆子悬浮翻腾,受热均匀,特别是纤维充分吸水膨胀软化。经过本发明整豆灭酶后的豆子加工成豆浆后,可产生熟豆的特有香味。本发明可在灭酶充分的基础上,同时将有害微生物处理。采用整豆灭酶,在酶释放(即豆子破碎)之前就对酶进行灭活,杜绝了后续豆腥味等不良风味的产生。(The invention discloses a whole-bean enzyme-inactivating soybean milk processing method which comprises the steps of whole-bean enzyme inactivation, wet-bean peeling, shearing and fine grinding, continuous high-pressure homogenization twice, cooling, secondary homogenization and the like, wherein in the whole-bean enzyme inactivation, soaked beans are transferred to an enzyme-inactivating device, the enzyme-inactivating temperature is controlled to be 93-98 ℃, the beans are spirally propelled and are sprayed to a suspension and turnover state by using 93-98 ℃ water, and after enzyme inactivation is continuously propelled for 15-20 minutes, the beans are output from the enzyme-inactivating device. The invention relates to a soybean milk processing method for inactivating enzyme of whole beans, which combines spiral continuous propulsion and spraying during enzyme inactivation, can lead beans to be suspended and boiled, and be heated uniformly, and especially lead fibers to be fully absorbed with water, expanded and softened. After the beans after the enzyme deactivation of the whole beans are processed into soybean milk, the special fragrance of cooked beans can be generated. The invention can treat harmful microorganisms on the basis of full enzyme inactivation. The whole bean is used for inactivating enzyme, and the enzyme is inactivated before the enzyme is released (namely, bean crushing), so that the generation of undesirable flavors such as follow-up beany flavor and the like is avoided.)

1. A method for processing whole soybean and enzyme-deactivated soybean milk is characterized by comprising the following steps:

washing and soaking: cleaning beans, putting the cleaned beans in water, and allowing the beans to absorb water to swell, wherein the temperature of the water and the water absorption swelling time adopt a set combination;

draining: draining the beans after washing and soaking;

enzyme deactivation of whole bean: transferring the soaked and drained beans to a feeding end of an enzyme deactivation device, controlling the enzyme deactivation temperature to be 93-98 ℃, spirally propelling the beans, flushing the beans with 93-98 ℃ water to a suspension and billowing state during spiral propelling, continuously propelling the enzyme deactivation for 15-20 minutes, and then outputting the beans from a discharging end of the enzyme deactivation device;

peeling wet beans: leveling the beans after enzyme deactivation, and then carrying out skin rubbing treatment;

coarse grinding: crushing the peeled beans;

shearing and fine grinding: cutting the crushed beans in a high-speed rotating manner, wherein the dietary fiber particles of the beans are in a slender shape;

two times of high-pressure homogenization are carried out continuously: micronizing the finely ground slender dietary fiber particles, and homogenizing to obtain 50-60 micrometer dietary fiber particles;

and (3) cooling: after two times of continuous high-pressure homogenization, cooling the homogenized slurry;

and (3) index standardization: carrying out index standardization on the cooled slurry;

and (4) homogenizing again: homogenizing the slurry with the standard index again;

ultra-high temperature sterilization: sterilizing the again homogenized pulp, wherein the sterilization temperature is 137-140 ℃, and the sterilization time is 10-15S;

and (3) sterile filling: and filling the pulp subjected to ultra-high temperature sterilization into a packaging bottle to obtain a finished product of the soybean milk.

2. The method for processing whole soybean milk with enzyme deactivation according to claim 1, wherein: the enzyme killing device is a continuous enzyme killing machine and comprises an outer barrel, a quantitative packing auger and a plurality of spray heads, wherein the quantitative packing auger is used for propelling beans, the spray heads are used for spraying and flushing beans to suspend and turn over, the quantitative packing auger is arranged in the outer barrel in the axial direction of the outer barrel, and the spray heads are arranged in the outer barrel in an alternate mode in the axial direction of the outer barrel.

3. The method for processing whole soybean milk with enzyme deactivation according to claim 1, wherein: the working pressure of the spray head is 0.1-0.2 MPa.

4. The method for processing whole soybean milk with enzyme deactivation according to claim 1, wherein: the enzyme inactivating device comprises a temperature rising section and a temperature holding section, the soaked beans are transferred into the temperature rising section, when the temperature of the beans rises to 93 ℃ or above, the beans enter the temperature holding section, the enzyme inactivating temperature of the temperature holding section is 93-98 ℃, and the enzyme inactivating time is 15-20 minutes.

5. The method for processing whole soybean milk with enzyme deactivation according to claim 1, wherein: the wet bean peeling comprises peeling and peel bean separation, when peeling is carried out, the beans after enzyme deactivation are leveled, the beans are located between two interlayers, the two interlayers rub the skins of the tiled beans by utilizing the corresponding moving speed difference, and the peeling rate is controlled to be 85-95%.

6. The method for processing whole soybean milk with enzyme deactivation according to claim 5, wherein: when the skin beans are separated, the skin beans and the beans which have different specific gravities in water are separated.

7. The method for processing whole soybean milk with enzyme deactivation according to claim 1, wherein: in the shearing and fine grinding, a high-speed rotating cutting device is used for cutting and fine grinding, and the rotating speed is 9000-10000 rpm.

8. The method for processing whole soybean milk with enzyme deactivation according to claim 1, wherein: the two continuous high-pressure homogenizers comprise a first high-pressure homogenizing and a second high-pressure homogenizing, wherein the first high-pressure homogenizing breaks the fine-ground slender dietary fiber particles under the homogenizing pressure of 40-70 MPa, and the second high-pressure homogenizing breaks the fiber particles uniformly under the homogenizing pressure of 40-70 MPa to obtain the dietary fiber particles of 50-60 micrometers.

9. The method for processing whole soybean milk with enzyme deactivation according to claim 1, wherein: in the second homogenization, the homogenization pressure is 20-30 MPa.

Technical Field

The invention relates to a soybean milk processing method, in particular to a soybean milk processing method for inactivating enzyme of whole soybean.

Background

Soybean is an important nutrient source, and how to more effectively utilize the nutrition of the soybean is the direction pursued by people. The existing soybean milk production process mostly adopts a deslagging process, the utilization rate of nutritional ingredients in soybeans is not comprehensive enough, a large amount of wastes are generated in production, and a food processing factory does not have a good method for treating the wastes.

In the traditional soybean milk processing, enzyme deactivation is realized mainly by a soybean boiling mode after soybeans such as soybeans are crushed (ground into pulp). The normal pressure soybean milk boiling enzyme deactivation is caused by the phenomenon that saponin contained in the soybean milk expands when heated to about 80 ℃ and floats on the surface of the soybean milk to form white bubbles, thereby causing false boiling. If the soybean milk is not boiled again, the saponin, trypsin inhibitor, phytohemagglutinin and other components in the soybean milk are not destroyed due to insufficient heat treatment strength, and the soybean milk is easy to be poisoned after drinking.

The technology for controlling beany flavor in the soybean milk production is also a great difficulty. The fat oxidase and the peroxidase are released after the epidermis and the cotyledon in the soybean are crushed, the enzymes can be activated by contacting with oxygen and immediately react with unsaturated fatty acid and other substances in the soybean, and the reaction process is very quick, so that bad flavors such as beany flavor and the like can be easily generated in the production process of the soybean milk without an effective control technology. Therefore, hot water grinding is often adopted during soybean milk production, so that the activity of substances such as lipoxygenase and peroxidase is inactivated, and the generation of beany flavor is reduced. The hot water refining has a good effect on removing the beany flavor, but cannot completely remove the beany flavor.

Along with the improvement of living standard of people, the quality requirement of the product is gradually improved, and the market research finds that the traditional soybean milk product in the market has more common flavor fed back by consumers, for example, the flavor of cooked soybean is less.

The inventor of the present invention makes intensive research and strives to develop a novel enzyme deactivation method to improve the flavor of soybean milk products.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a method for processing whole soybean milk, which can not only inactivate enzymes, but also improve the flavor of cooked soybean and remove the beany flavor, thereby improving the flavor of the product.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a method for processing whole soybean milk with enzyme deactivation comprises the following steps:

washing and soaking: cleaning bean, placing in water of 20 deg.C, and allowing bean to absorb water and swell for 6-8 hr;

draining: draining the beans after washing and soaking;

enzyme deactivation of whole bean: transferring the soaked and drained beans to a feeding end of an enzyme deactivation device, controlling the enzyme deactivation temperature to be 93-98 ℃, spirally propelling the beans, flushing the beans with 93-98 ℃ water to a suspension and billowing state during spiral propelling, continuously propelling the enzyme deactivation for 15-20 minutes, and then outputting the beans from a discharging end of the enzyme deactivation device;

peeling wet beans: leveling the beans after enzyme deactivation, and then carrying out skin rubbing treatment;

coarse grinding: crushing the peeled beans;

shearing and fine grinding: cutting the crushed beans in a high-speed rotating manner, wherein the dietary fiber particles of the beans are in a slender shape;

two times of high-pressure homogenization are carried out continuously: micronizing the finely ground slender dietary fiber particles, and homogenizing to obtain 50-60 micrometer dietary fiber particles;

and (3) cooling: after two times of continuous high-pressure homogenization, cooling the homogenized slurry;

and (3) index standardization: carrying out index standardization on the cooled slurry;

and (4) homogenizing again: homogenizing the slurry with the standard index again;

ultra-high temperature sterilization: sterilizing the again homogenized pulp, wherein the sterilization temperature is 137-140 ℃, and the sterilization time is 10-15S;

and (3) sterile filling: and filling the pulp subjected to ultra-high temperature sterilization into a packaging bottle to obtain a finished product of the soybean milk.

Further, the enzyme killing device is a continuous enzyme killing machine, and comprises an outer barrel, a quantitative packing auger and a plurality of spray heads, wherein the quantitative packing auger is used for propelling beans, the spray heads are used for spraying and flushing the beans to suspend and turn over, the quantitative packing auger is arranged in the outer barrel in the axial direction of the outer barrel, and the spray heads are arranged in the axial direction of the outer barrel at intervals.

Further, the working pressure of the spray head is 0.1-0.2 MPa.

Further, the enzyme deactivation device comprises a temperature rise section and a temperature holding section, the soaked beans are transferred into the temperature rise section, when the temperature of the beans rises to 93 ℃ or above, the beans enter the temperature holding section, the enzyme deactivation temperature of the temperature holding section is 93-98 ℃, and the enzyme deactivation time is 15-20 minutes.

Further, in the process of peeling the wet beans, the beans after enzyme deactivation are leveled, the beans are positioned between the two interlayers, the two interlayers carry out the peeling treatment on the tiled beans by utilizing the corresponding moving speed difference, the peeling rate is controlled to be 85-95%, and part of the bean skins are reserved.

Further, in the shearing and fine grinding, the cutting and fine grinding are carried out by utilizing a high-speed rotating cutting device, and the rotating speed is 9000-10000 r/min.

Further, the two continuous high-pressure homogenizers comprise a first high-pressure homogenizing and a second high-pressure homogenizing, the first high-pressure homogenizing breaks the fine-ground slender dietary fiber particles under the homogenizing pressure of 40-70 MPa, and the second high-pressure homogenizing breaks the fiber particles more uniformly and smoothly under the homogenizing pressure of 40-70 MPa, so that the dietary fiber particles with the particle size of 50-60 microns are obtained.

Further, in the second homogenization, the homogenization pressure is 20-30 MPa.

After the technical scheme is adopted, the whole-bean enzyme-inactivating soybean milk processing method has the following beneficial effects: when the enzyme is inactivated, the spiral continuous propulsion and the spraying are combined, the beans can be suspended and overturned and are in a dynamic state, the beans are separated from the beans as far as possible and are not in contact with each other, so that the beans are heated uniformly, particularly, the fibers are fully swelled and softened by water absorption, and the beans after being fully swelled and softened by water absorption are convenient for subsequent fiber micronization treatment, so that the content of natural dietary fibers in the finished soybean milk product is increased, the finished soybean milk product has the fragrance of cooked beans, and the beans in the finished soybean milk product at least contain 1.3% of natural dietary fibers. The invention firstly creates an enzyme deactivation method for deactivating enzyme of whole beans (beans are not crushed and ground into slurry), namely a novel method for deactivating enzyme of beans; in addition, after the beans after the enzyme deactivation of the whole beans are processed into soybean milk, the soybean milk processed subsequently can generate the special fragrance of cooked beans because the fibers of the beans reach the state of full water absorption, swelling and softening during the enzyme deactivation. The invention combines enzyme-inactivating time and temperature, and can treat harmful microorganisms on the basis of full enzyme inactivation. The soybean milk processing of the invention adopts the technology of 'enzyme deactivation of whole soybean', the removal and control of beany flavor are the most thorough, the enzyme is deactivated before the enzyme is released (namely before the soybean is crushed), and the generation of bad flavor in a series of subsequent production procedures is avoided.

Drawings

FIG. 1 shows a continuous enzyme deactivation machine according to the present invention.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

First, processing method

A method for processing whole soybean milk with enzyme deactivation comprises the following steps:

washing and soaking: cleaning bean, placing in water of 20 deg.C, allowing bean to absorb water and swell for 6-8h, wherein the bean can be semen glycines, semen Sojae Atricolor or semen Phaseoli Radiati, and the water temperature and water swelling time can be other set combinations to meet the requirement of soaking bean in industry;

draining: draining the beans after washing and soaking;

enzyme deactivation of whole bean: transferring the soaked and drained beans to a feeding end of an enzyme deactivation device, controlling the enzyme deactivation temperature to be 93-98 ℃, spirally propelling the beans, flushing the beans with 93-98 ℃ water to a suspension and billowing state during spiral propelling, continuously propelling the enzyme deactivation for 15-20 minutes, and then outputting the beans from a discharging end of the enzyme deactivation device;

peeling wet beans: leveling the beans after enzyme deactivation, and then carrying out skin rubbing treatment;

coarse grinding: crushing the peeled beans, specifically, performing stone grinding by using hot water at the temperature of 80-90 ℃ to obtain particles with the particle size of 80-100 meshes;

shearing and fine grinding: cutting the crushed beans in a high-speed rotating manner, wherein the dietary fiber particles of the beans are slender, controlling the D90 particle size of the dietary fiber particles in fine grinding, and shearing and fine grinding to obtain dietary fiber particles of 70-80 microns;

compared with the friction heating problem caused by traditional pulping, the friction heating method is easier to control, the dietary fibers are chopped by high-speed shearing, the effective contact time of the pulp and the blades is short during high-speed cutting, and the friction heating problem can be effectively controlled by the method, so that the protein denaturation in the pulping process is reduced.

Two times of high-pressure homogenization are carried out continuously: micronizing the finely ground slender dietary fiber particles, wherein the homogenization temperature is 60-75 ℃, and homogenizing to obtain 50-60 micrometer dietary fiber particles;

through twice continuous high-pressure homogenization, the content of crude fiber in the bean curd skin can be reasonably controlled, and the treatment effect of the bean curd fiber can be improved.

And (3) cooling: after two times of continuous high-pressure homogenization, cooling the homogenized slurry to 10-15 ℃;

and (3) index standardization: carrying out index standardization on the cooled slurry;

and (4) homogenizing again: homogenizing the slurry with the standard index again;

ultra-high temperature sterilization: sterilizing the again homogenized pulp, wherein the sterilization temperature is 137-140 ℃, and the sterilization time is 10-15S;

and (3) sterile filling: and filling the pulp subjected to ultra-high temperature sterilization into a packaging bottle to obtain a finished soybean milk product, wherein the finished soybean milk product at least contains 1.3% of natural dietary fibers.

According to the soybean milk processing method for inactivating enzyme of whole beans, disclosed by the invention, when the enzyme is inactivated, spiral continuous propulsion and spraying are combined, so that beans can be suspended and tumbled and are in a dynamic state, the beans are separated from the beans as far as possible and are not contacted, the beans are uniformly heated, and particularly, fibers are fully swollen and softened by absorbing water. The bean after the fibers are fully absorbed with water, expanded and softened is convenient for subsequent micronization treatment of the fibers, so that the content of natural dietary fibers in the finished soybean milk product is improved, and the finished soybean milk product has the fragrance of cooked beans. The invention firstly creates an enzyme deactivation method for deactivating enzyme of whole beans (beans are not crushed and ground into slurry), namely a novel method for deactivating enzyme of beans; in addition, after the beans after the enzyme deactivation of the whole beans are processed into soybean milk, the soybean milk processed subsequently can generate the special fragrance of cooked beans because the fibers of the beans reach the state of full water absorption, swelling and softening during the enzyme deactivation. The combination of enzyme deactivation time and temperature can treat harmful microorganisms on the basis of full enzyme deactivation.

As a preferred embodiment, the enzyme deactivation device is a continuous enzyme deactivation machine, and comprises an outer cylinder, a quantitative packing auger for propelling the beans to advance, and a plurality of spray heads for spraying and flushing the beans to suspend and turn over, wherein the quantitative packing auger is arranged in the outer cylinder along the axial direction of the outer cylinder, and the plurality of spray heads are alternately arranged along the axial direction of the outer cylinder.

As a preferable embodiment, the working pressure of the spray head is 0.1-0.2 MPa. If the pressure of the spray head is lower than 0.1MPa, the spraying impact force cannot reach the expectation, the beans cannot be sprayed to a suspended and overturned state, if the pressure of the spray head is higher than 0.2MPa, the bean skins of the beans are easy to fall off accidentally, and the protein of the bean cotyledon can be lost if the bean skins fall off in the enzyme deactivation process.

As a preferred embodiment, as shown in fig. 1, the enzyme deactivation device comprises a temperature rising section and a temperature holding section, the beans which are well soaked are transferred into the temperature rising section, when the temperature of the beans rises to 93 ℃ or above, the beans enter the temperature holding section, the enzyme deactivation temperature of the temperature holding section is 93-98 ℃, and the enzyme deactivation time is 15-20 minutes. It should be noted that the temperature control of the enzyme deactivation device of the invention adopts an intelligent temperature control system, the temperature control is accurate, and the temperature can be set automatically.

In a preferred embodiment, in the wet bean peeling process, the beans after enzyme deactivation are leveled, the beans are positioned between two interlayers, the two interlayers perform the peeling treatment on the tiled beans by using the corresponding moving speed difference, the peeling rate is controlled to be 85-95%, and partial bean skins are remained.

Traditionally, bean peeling can not be realized industrially, and traditionally, dry bean peeling is basically adopted.

If the reasonable peeling treatment is not carried out, too much peel fiber is generated in the subsequent treatment, the treatment of the bean fibers is interfered, and the quality of the finished product is greatly influenced.

In the fine grinding, cutting fine grinding is carried out by using a high-speed rotating cutting device, and the rotating speed is 9000-10000 rpm. Preferably, the high speed rotary cutting apparatus contains 210 slices.

As a preferable embodiment, the two successive high-pressure homogenizers include a first high-pressure homogenizer for smashing the fine-ground slender dietary fiber particles under a homogenizing pressure of 40-70 MPa (specifically, 50MPa), wherein the conventional homogenizing pressure is usually 20-30MPa, and the pressure is insufficient, so that the smashing effect cannot be achieved.

And (3) beating the fiber particles to be more uniform and smooth under the condition of the homogenizing pressure of 40-70 MPa (specifically 50MPa) in the second high-pressure homogenizing process to obtain the dietary fiber particles with the particle size of 50-60 microns.

In a preferable embodiment, the homogenization pressure is 20 to 30MPa in the re-homogenization.

The soybean milk processing of the invention adopts the technology of 'enzyme deactivation of whole soybean', can completely avoid the occurrence of false boiling phenomenon, and is a novel and upgraded safe process. The spiral propulsion can be used for effectively setting and controlling the cooking time of the beans, the temperature monitoring and intelligent temperature control technology for dividing the temperature rising area and the temperature holding area and carrying out the whole bean enzyme deactivation process completely avoids the phenomenon of incomplete enzyme deactivation caused by abnormal bean cooking temperature or bean cooking time.

The soybean milk processing of the invention adopts the technology of 'enzyme deactivation of whole soybean', the removal and control of beany flavor are the most thorough, the enzyme is inactivated before the enzyme is released (namely before the beans are crushed), and the generation of bad flavors such as beany flavor and the like in a series of subsequent production procedures is avoided. The bean fragrance generated by the whole bean enzyme deactivation technology is also the most intense cooked bean fragrance, and is different from the bean fragrance generated by other soybean milk cooking processes.

The content of the nutrient components of the soybean milk produced by the whole soybean enzyme deactivation technology is different from that of the soybean milk produced by the normal pressure soybean milk boiling enzyme deactivation technology, and the content of the dietary fiber is most obvious. Usually, soybean milk produced by boiling and inactivating enzymes at normal pressure is subjected to soybean fiber separation after grinding, and the separation process can remove nutritional ingredients such as dietary fibers in soybeans, so that the utilization rate of the nutritional substances in the soybeans is reduced. The whole soybean milk production process firstly enables soybean fibers to fully absorb water and swell, and then adopts the whole soybean enzyme deactivation technology to further enable the fibers to absorb water and swell and soften while completing enzyme deactivation, so that the toughness of the soybean fibers is reduced, and the operation has an important effect on the treatment of the soybean fibers by the subsequent whole soybean milk production process. The detection result of the dietary fiber of the non-whole soybean milk is 0g/100ml because the non-whole soybean milk separates the fiber in the soybean in the production process. The analysis and comparison of the detection reports of the whole soybean milk and the non-whole soybean milk show that the content of some amino acids is also greatly different. The content difference of lysine, histidine and arginine is large, and the comparison shows that the whole bean enzyme inactivating technology has better advantages on the protection of nutrient components.

In conclusion, the whole bean enzyme deactivation technology of the invention can treat the enzyme in the soybean milk more comprehensively and thoroughly, and the product is safer. The whole bean enzyme inactivating technology is also a subversive innovation on the beany flavor control technology in the soybean milk, and the product has strong cooked bean fragrance, which is a positive effect on the control of the product flavor and the development of the soybean milk industry. Meanwhile, the soybean milk product produced by adopting the whole soybean enzyme deactivation technology has more retained nutrient components than the soybean milk product produced by adopting the normal pressure soybean milk boiling enzyme deactivation technology, and has greater advantages.

Second, experimental results

1. Comparing the urease and trypsin inhibiting factor detection results of the whole bean enzyme deactivation (95-98 ℃/15-20min), the normal pressure pulp boiling enzyme deactivation (boiling and then continuing to boil for 10min) and the micro pressure pulp boiling enzyme deactivation (105 ℃/10min), the urease and trypsin inhibiting factor detection results of the three are negative, which shows that the enzyme deactivation effect of the whole bean enzyme deactivation is thorough and safe.

2. The effects of inactivating enzyme (95-98 deg.C/15-20 min) in whole bean and in normal pressure cooking pulp (boiling and then boiling for 10min) are shown in the following table:

comparison table for enzyme deactivation of whole bean and enzyme deactivation of normal pressure pulp boiling

The above examples and drawings are not intended to limit the scope of the present invention, and any suitable changes or modifications thereof by one of ordinary skill in the art should be considered as not departing from the scope of the present invention.