Method for preparing nutrient enrichment dried beancurd sticks from selenium-enriched tea scraps

Abstract

The invention relates to a method for preparing nutrient enrichment dried beancurd sticks from selenium-enriched tea scraps. The method mainly comprises the steps of crushing the selenium-enriched teascraps, performing extraction by ultrasonic-assisted hot water extraction method, and performing vacuum concentration to obtain a selenium-enriched tea extraction solution; and peeling soybeans, performing soaking, performing grinding to obtain pulp, cooking the pulp, mixing the cooked pulp with the selenium-enriched tea extraction solution and a modifier in proportion, then performing uncoveringto obtain dried beancurd stick semi-finished products, and performing baking to obtain the nutrient enrichment dried beancurd sticks. The technical method provided by the invention has the characteristics of being low in production cost, simple, convenient and easy to operate; and the selenium-enriched tea scraps are subjected to high-value utilization, bioactive components of organic selenium, tea polyphenols and dietary fibers in the dried beancurd stick are strengthened, the prepared nutrient enrichment dried beancurd sticks concurrently have good mouth feel and the characteristics of health-care foods, and the method can be applied to production of high-grade nutrient enrichment dried beancurd sticks.

Description

technical field

[0001] The invention relates to a bean curd stick and a preparation method thereof, in particular to a method for producing nutritionally enhanced bean curd sticks by utilizing selenium-enriched tea leftovers, which belongs to the food processing technology. Background technique

[0002] Soybean is a high-quality source of plant protein because of its high protein content and amino acid composition similar to the needs of the human body. The processing of bean curd sticks began in the Tang Dynasty and has a history of more than 1,000 years. It is boiled soybean milk. After a certain period of heat preservation, the surface of the bean curd will produce an oily film, which is exposed and dried. It is one of the famous national specialty foods in my country. one. Yuba is a high-grade product in soybean products, in which soybean protein content is about 40%, fat is 20%, and it is rich in soybean saponin, riboflavin, amino acid and other nutrients needed by huma...

Examples

Embodiment 1

[0025] Embodiment 1: a kind of method utilizing selenium-enriched tea leftovers to produce nutritionally enhanced bean curd sticks, comprising the following steps:

[0026] (1) Dried the leftovers of selenium-enriched tea and crushed them through 40 meshes to obtain selenium-enriched tea powder; adding distilled water according to the weight volume ratio of tea powder and water as 1:20, and stirring evenly; using an electronic ultrasonic bath to extract, extract The conditions are: temperature 75°C, ultrasonic power 180W, time 18 minutes; after filtering with filter paper, vacuum concentration treatment is carried out under the conditions of vacuum degree 0.09MPa and temperature 55°C to obtain a selenium-enriched tea extract with a water content of 30%; Selenium-enriched tea refers to tea produced in selenium-enriched soil areas, or tea planted and produced by spraying selenium-enriched foliar fertilizers, the organic selenium content of which is not less than 1.2 mg / kg in dry ...

Embodiment 2

[0030] Embodiment 2: a kind of method that utilizes selenium-enriched tea leftovers to produce nutrition-enhanced bean curd sticks, comprising the following steps:

[0031] (1) Dried and pulverized the leftovers of selenium-enriched tea, passed through 60 meshes, to obtain selenium-enriched tea powder; added distilled water according to the weight volume ratio of tea powder and water as 1:30, and stirred evenly; used electronic ultrasonic bath to extract, extract The conditions are: temperature 85°C, ultrasonic power 220W, time 16 minutes; after filtering with filter paper, vacuum concentration treatment is carried out under the conditions of vacuum degree 0.09MPa and temperature 61°C to obtain a selenium-enriched tea extract with a water content of 35%;

[0032] (2) Get fresh soybeans, peel them with a peeling machine after cleaning; place the peeled soybeans in water according to a weight ratio of 1:4, soak them for 8 hours at 35°C, then add water equivalent to 9 times the we...

technical field

[0001] The invention relates to a bean curd stick and a preparation method thereof, in particular to a method for producing nutritionally enhanced bean curd sticks by utilizing selenium-enriched tea leftovers, which belongs to the food processing technology. Background technique

[0002] Soybean is a high-quality source of plant protein because of its high protein content and amino acid composition similar to the needs of the human body. The processing of bean curd sticks began in the Tang Dynasty and has a history of more than 1,000 years. It is boiled soybean milk. After a certain period of heat preservation, the surface of the bean curd will produce an oily film, which is exposed and dried. It is one of the famous national specialty foods in my country. one. Yuba is a high-grade product in soybean products, in which soybean protein content is about 40%, fat is 20%, and it is rich in soybean saponin, riboflavin, amino acid and other nutrients needed by huma...

Examples

Embodiment 1

[0025] Embodiment 1: a kind of method utilizing selenium-enriched tea leftovers to produce nutritionally enhanced bean curd sticks, comprising the following steps:

[0026] (1) Dried the leftovers of selenium-enriched tea and crushed them through 40 meshes to obtain selenium-enriched tea powder; adding distilled water according to the weight volume ratio of tea powder and water as 1:20, and stirring evenly; using an electronic ultrasonic bath to extract, extract The conditions are: temperature 75°C, ultrasonic power 180W, time 18 minutes; after filtering with filter paper, vacuum concentration treatment is carried out under the conditions of vacuum degree 0.09MPa and temperature 55°C to obtain a selenium-enriched tea extract with a water content of 30%; Selenium-enriched tea refers to tea produced in selenium-enriched soil areas, or tea planted and produced by spraying selenium-enriched foliar fertilizers, the organic selenium content of which is not less than 1.2 mg / kg in dry ...

Embodiment 2

[0030] Embodiment 2: a kind of method that utilizes selenium-enriched tea leftovers to produce nutrition-enhanced bean curd sticks, comprising the following steps:

[0031] (1) Dried and pulverized the leftovers of selenium-enriched tea, passed through 60 meshes, to obtain selenium-enriched tea powder; added distilled water according to the weight volume ratio of tea powder and water as 1:30, and stirred evenly; used electronic ultrasonic bath to extract, extract The conditions are: temperature 85°C, ultrasonic power 220W, time 16 minutes; after filtering with filter paper, vacuum concentration treatment is carried out under the conditions of vacuum degree 0.09MPa and temperature 61°C to obtain a selenium-enriched tea extract with a water content of 35%;

[0032] (2) Get fresh soybeans, peel them with a peeling machine after cleaning; place the peeled soybeans in water according to a weight ratio of 1:4, soak them for 8 hours at 35°C, then add water equivalent to 9 times the we...