Bamboo shoot microwave curing processing technology

Abstract

In a raw material pretreatment process, bamboo shoots can be cleaned and residual nitrite can be cleared away, in a raw material infiltration treatment process, a treatment solution can permeate into the bamboo shoots through cuts or holes to be in full contact with the nitrite in the bamboo shoots, and in a pre-curing process, the bamboo shoots are subjected to microwave curing so as to be subjected to microwave curing. At a low temperature, the infiltrated treatment liquid is in full contact with the bamboo shoots and is dissolved at a good temperature, so that the decomposition speed of nitrite can be effectively increased, the nitrite is rapidly separated from the bamboo shoots under continuous flowing and washing of the other two treatment liquids, finally, residues are avoided by washing with water, and under a vacuum negative pressure state, the content of the nitrite in the bamboo shoots is reduced. According to the method, nitrite in water molecules in the bamboo shoots can be sucked out together with the water molecules, the content of the nitrite is reduced to the maximum extent, curing is achieved while heat preservation is conducted, and the problem that the content of the nitrite is too high is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of bamboo shoot production and processing, and relates to a bamboo shoot microwave ripening processing technology. Background Art

[0002] In the production and processing of bamboo shoots, in order to keep the bamboo shoots fresh and prevent them from rotting, they are usually stored in salt. This storage method will increase the nitrite content in the bamboo shoots. After the stored bamboo shoots are washed and soaked, they are cooked in a large frying pan. The nitrite content of the finished product is still at a high level, which is not conducive to the health of the consumers. Therefore, a new bamboo shoot cooking process is urgently needed to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a bamboo shoot microwave cooking process, which solves the problem of excessively high nitrite content in products formed by the existing bamboo shoot processing process.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A bamboo shoot microwave cooking process comprises the following steps:

[0006] Prepare the treatment solution: obtain tea, vegetable juice and fruit juice separately and dilute them;

[0007] Raw material pretreatment: Wash the stored bamboo shoots, soak them in water for 2-4 hours and drain;

[0008] Raw material infiltration treatment: making cuts or buckles on the surface of the pretreated bamboo shoots, and spraying one of the treatment liquids on the surface;

[0009] Pre-cooking 1: Spread the soaked bamboo shoots on multiple flat plates, place them in a microwave cooking processing device and arrange them in order, and keep them at 50-70℃ for 8-15 minutes;

[0010] Pre-ripening 2: spray the other two treatment liquids from the top of the microwave aging processing equipment downward in sequence and cover the area where the bamboo shoots are located. Each treatment liquid is sprayed for 3-5 minutes, and the temperature is maintained at 50-70° C., and finally rinsed with clean water;

[0011] Curing: The microwave curing processing equipment is evacuated and heated at 120° C.-150° C. for 12-15 minutes.

[0012] Furthermore, the tea includes one or more of oolong tea, green tea, black tea or scented tea.

[0013] Further, 200-250 mL of water is used for dilution per gram of tea leaves.

[0014] Furthermore, the raw materials used in the vegetable juice include one or more of onion, scallion, garlic, tomato, bitter gourd, carrot, yam, cucumber or ginger.

[0015] Furthermore, the amount of water used to dilute the vegetable juice is 300-400 mL per gram.

[0016] Furthermore, one or more of hawthorn, citrus, winter jujube, grape, mulberry or kiwi fruit is diluted with 300-400 mL of water per gram of fruit juice.

[0017] Furthermore, in the two process flows of the raw material infiltration treatment and the pre-ripening treatment, the temperature of the treatment liquid is 50-70°C.

[0018] Furthermore, the microwave cooking processing equipment includes a main body, a first spraying assembly, a second spraying assembly and a plurality of flat plates. The bottom of the main body is provided with a lower leakage port that can be opened and closed. The plurality of flat plates are arranged in an upper and lower interval inside the main body. The first spraying assembly and the second spraying assembly are both installed on the inner top of the main body. The first spraying assembly is suitable for spraying the treatment liquid, and the second spraying assembly is suitable for spraying clean water.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the microwave ripening process of the present invention, the three treatment liquids of tea, vegetable juice and fruit juice all have the effect of decomposing nitrite ammonia, and will not affect the product safety of the bamboo shoots themselves. During the raw material pretreatment process, the bamboo shoots can be cleaned and the residual nitrite can be removed. During the raw material infiltration process, the treatment liquid can penetrate into the bamboo shoots through the cuts or holes, and fully contact with the nitrite inside the bamboo shoots. During the pre-ripening process, at a relatively low temperature, the infiltrating treatment liquid fully contacts with the bamboo shoots and dissolves at a relatively good temperature, which can effectively accelerate the nitrite removal. The decomposition rate of the acid salt is increased to minimize the content of nitrite. Then, under the continuous flow and flushing of the other two treatment liquids, the bamboo shoots in each plate are flushed from top to bottom in turn. When the nitrite in the bamboo shoots is dissolved, the bamboo shoots are quickly separated from the bamboo shoots. Finally, the bamboo shoots are rinsed with water to avoid residues. Under the vacuum negative pressure state, the nitrite located in the water molecules inside the bamboo shoots can be sucked out together with the water molecules, thereby maximizing the reduction of the nitrite content. The bamboo shoots are kept warm and matured at the same time, thus solving the problem of excessively high nitrite content in products formed by the existing bamboo shoot processing technology. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention described and shown herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0023] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0024] As described in the background technology, in the production and processing of bamboo shoots, in the early stage, in order to keep the bamboo shoots fresh and prevent them from rotting, a salting storage method is usually adopted. However, this storage method will increase the nitrite content in the bamboo shoots. The stored bamboo shoots are washed and soaked and then cooked in a large frying pan. The nitrite content of the finished product is still at a high level, which is not conducive to the health of the eater. Therefore, a new bamboo shoot cooking process is urgently needed to solve the above problems.

[0025] Based on this, the inventors have created a bamboo shoot microwave cooking process of the present application to solve the above-mentioned technical problems.

[0026] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0027] Example

[0028] A bamboo shoot microwave cooking process comprises the following steps:

[0029] Prepare treatment solution: separately obtain tea, vegetable juice and fruit juice and dilute them. For example, tea may include one or more of oolong tea, green tea, black tea or scented tea, preferably oolong tea, which has a wonderful effect of dissolving nitrite and can add the fragrance of tea to bamboo shoots. It has been verified in practice that when 200-250mL of water is used for dilution of each gram of tea, the effect of dissolving nitrite is good and the cost is low. For example, the raw materials used in vegetable juice may include one or more of onion, scallion, garlic, tomato, bitter melon, carrot, yam, cucumber or ginger, and vegetable juice can also dissolve nitrite, and it has been verified in practice that 300-400mL of water per gram of vegetable juice can ensure the dissolution effect and the cost is low. Similarly, one or more of hawthorn, citrus, winter jujube, grape, mulberry or kiwi fruit, 300-400mL of water is used for dilution of each gram of fruit juice. In addition, citrus rich in vitamin C has a better effect.

[0030] Raw material pretreatment: After washing the stored bamboo shoots, soak them in water for 2-4 hours and drain. In this step, the bamboo shoots can be cleaned and the nitrite residue can be reduced.

[0031] Raw material infiltration treatment: cut or insert a buckle on the surface of the pre-treated bamboo shoots, and spray one of the treatment liquids on the surface. In the raw material infiltration treatment and the pre-ripening process, the temperature of the treatment liquid is 50-70°C, so that the treatment liquid can be kept consistent with the insulation temperature in the microwave aging processing equipment, further improving the dissolution effect.

[0032] Pre-cooking 1: Spread the soaked bamboo shoots on multiple flat plates, place them in a microwave cooking processing device, and keep them at 50-70° C. for 8-15 minutes. In this step, the soaking treatment liquid and the nitrite in the bamboo shoots are fully dissolved.

[0033] Pre-ripening 2: Spray the other two treatment liquids from the top of the microwave aging processing equipment downward in sequence, and cover the area where the bamboo shoots are located. Each treatment liquid is sprayed for 3-5 minutes, and the temperature is maintained at 50-70°C. Finally, rinse with clean water. In this step, the bamboo shoots are arranged in the upper and lower directions through multiple flat plates. The treatment liquid and clean water sprayed from the top can cover each bamboo shoot, achieving the flushing effect of the flowing liquid. When the liquid flows, it directly takes away the nitrite, which is more effective.

[0034] Ripening: The microwave aging processing equipment is vacuumed and heated at 120° C.-150° C. for 12-15 minutes. During the vacuuming process, the nitrite in the water inside the bamboo shoots can be drawn out together with the water molecules, thereby maximally reducing the content of nitrite.

[0035] In the microwave ripening process of the present invention, the three treatment liquids of tea, vegetable juice and fruit juice all have the effect of decomposing nitrite ammonia, and will not affect the product safety of the bamboo shoots themselves. During the raw material pretreatment process, the bamboo shoots can be cleaned and the residual nitrite can be removed. During the raw material infiltration process, the treatment liquid can penetrate into the bamboo shoots through the cuts or holes, and fully contact with the nitrite inside the bamboo shoots. During the pre-ripening process, at a relatively low temperature, the infiltrating treatment liquid fully contacts with the bamboo shoots and dissolves at a relatively good temperature, which can effectively accelerate the nitrite removal. The decomposition rate of the acid salt is increased to minimize the content of nitrite. Then, under the continuous flow and flushing of the other two treatment liquids, the bamboo shoots in each plate are flushed from top to bottom in turn. When the nitrite in the bamboo shoots is dissolved, the bamboo shoots are quickly separated from the bamboo shoots. Finally, the bamboo shoots are rinsed with water to avoid residues. Under the vacuum negative pressure state, the nitrite located in the water molecules inside the bamboo shoots can be sucked out together with the water molecules, thereby maximizing the reduction of the nitrite content. The bamboo shoots are kept warm and matured at the same time, thus solving the problem of excessively high nitrite content in products formed by the existing bamboo shoot processing technology.

[0036] In another embodiment, the microwave cooking processing equipment includes a body, a first spraying assembly, a second spraying assembly and a plurality of flat plates, the bottom of the body is provided with a lower leakage port that can be opened and closed, the plurality of flat plates are arranged in the interior of the body at intervals, the first spraying assembly and the second spraying assembly are both installed on the inner top of the body, the first spraying assembly is suitable for spraying the treatment liquid, and the second spraying assembly is suitable for spraying the clean water. With such an arrangement, the microwave cooking processing equipment can be adapted to the microwave cooking process, and the effect of reducing the nitrous acid content is better.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bamboo shoot microwave cooking process, characterized in that: The following steps are involved: Prepare the treatment solution: obtain tea, vegetable juice and fruit juice separately and dilute them; Raw material pretreatment: Wash the stored bamboo shoots, soak them in water for 2-4 hours and drain; Raw material infiltration treatment: making cuts or buckles on the surface of the pretreated bamboo shoots, and spraying one of the treatment liquids on the surface; Pre-cooking 1: Spread the soaked bamboo shoots on multiple flat plates, place them in a microwave cooking processing device and arrange them in order, and keep them at 50-70℃ for 8-15 minutes; Pre-ripening 2: spray the other two treatment liquids from the top of the microwave aging processing equipment downward in sequence and cover the area where the bamboo shoots are located. Each treatment liquid is sprayed for 3-5 minutes, and the temperature is maintained at 50-70° C., and finally rinsed with clean water; Curing: The microwave curing processing equipment is evacuated and heated at 120° C.-150° C. for 12-15 minutes.

2. The microwave cooking process of bamboo shoots according to claim 1, characterized in that: The tea includes one or more of oolong tea, green tea, black tea or scented tea.

3. The microwave cooking process of bamboo shoots according to claim 2, characterized in that: Dilute 200-250mL of water per gram of tea.

4. The microwave cooking process of bamboo shoots according to claim 1, characterized in that: The raw materials used in the vegetable juice include one or more of onion, scallion, garlic, tomato, bitter gourd, carrot, yam, cucumber or ginger.

5. The microwave cooking process of bamboo shoots according to claim 4, characterized in that: Each gram of vegetable juice is diluted with 300-400 mL of water.

6. The microwave cooking process of bamboo shoots according to claim 1, characterized in that: One or more of hawthorn, citrus, winter jujube, grape, mulberry or kiwi, with 300-400mL of water used to dilute each gram of fruit juice.

7. The microwave cooking process of bamboo shoots according to claim 1, characterized in that: In the raw material infiltration treatment and the pre-ripening process, the temperature of the treatment liquid is 50-70°C.

8. A bamboo shoot microwave cooking process according to any one of claims 1 to 7, characterized in that: The microwave cooking processing equipment includes a main body, a first spraying assembly, a second spraying assembly and a plurality of flat plates. The bottom of the main body is provided with a lower leakage port that can be opened and closed. The plurality of flat plates are arranged in an upper and lower interval inside the main body. The first spraying assembly and the second spraying assembly are both installed on the inner top of the main body. The first spraying assembly is suitable for spraying the treatment liquid, and the second spraying assembly is suitable for spraying clean water.