阅读说明：本技术 一种富硒黑糖及其制备方法 (Selenium-rich brown sugar and preparation method thereof ) 是由 钱小红 于 2019-11-01 设计创作，主要内容包括：本发明提出了一种富硒黑糖的制备方法,包括：S1.将甘蔗去皮、切段,榨汁,汁液过滤,加入蔗糖酶和麦芽糖酶,调节条件酶解,调条件,加入富硒酵母,酶解,灭酶,过滤,浓缩,得到浓缩甘蔗汁；S2.将浓缩甘蔗汁进行熬煮,150-190℃熬煮30-50min,加入赤砂糖,搅拌溶解,190-220℃熬煮60-100min,加入甜菊糖苷,搅拌溶解,220-270℃熬煮30-60min,降温至100-120℃；S3.将熬煮好的液体平铺在凉床上,用划线具将其整齐划线,待完全冷却成形后,即可打包,出售。本发明通过添加富硒酵母使得黑糖的口感更香甜,且富含硒元素,拓宽了保健功效。(The invention provides a preparation method of selenium-rich brown sugar, which comprises the following steps: s1, peeling sugarcane, cutting into sections, squeezing, filtering juice, adding sucrase and maltase, adjusting conditions for enzymolysis, adjusting conditions, adding selenium-enriched yeast, performing enzymolysis, inactivating enzymes, filtering, and concentrating to obtain concentrated sugarcane juice; s2, boiling the concentrated sugarcane juice, boiling for 30-50min at 190 ℃ in 150-fold manner, adding brown granulated sugar, stirring and dissolving, boiling for 60-100min at 220-fold manner in 190-fold manner, adding stevioside, stirring and dissolving, boiling for 30-60min at 270 ℃ in 220-fold manner, and cooling to 120 ℃ in 100-fold manner; s3, spreading the boiled liquid on a cooling bed, neatly marking the liquid by using a marking tool, and packaging and selling the liquid after completely cooling and forming. According to the invention, the brown sugar is more fragrant and sweet in taste by adding the selenium-rich yeast, and is rich in selenium element, so that the health-care effect is widened.)

1. The preparation method of the selenium-rich brown sugar is characterized by comprising the following steps of:

s1, peeling sugarcane, cutting into sections, juicing, and filtering juice to obtain primary sugarcane juice; adding sucrase and maltase into the primary sugarcane juice, adjusting to a first condition for enzymolysis, adjusting to a second condition, adding selenium-enriched yeast, performing enzymolysis, inactivating enzymes, filtering, and concentrating to obtain concentrated sugarcane juice;

s2, boiling the concentrated sugarcane juice, boiling for 30-50min at 190 ℃ in 150-fold manner, adding brown granulated sugar, stirring and dissolving, boiling for 60-100min at 220-fold manner in 190-fold manner, adding stevioside, stirring and dissolving, boiling for 30-60min at 270 ℃ in 220-fold manner, and cooling to 120 ℃ in 100-fold manner;

s3, spreading the boiled liquid on a cooling bed, neatly marking the liquid by using a marking tool, and packaging and selling the liquid after completely cooling and forming.

2. The method for preparing the selenium-rich brown sugar as claimed in claim 1, wherein the addition amounts of the sucrase and the maltase are 1000U/kg and 1200U/kg, respectively, and the enzyme activities of the sucrase and the maltase are 300U/g and 500U/g, respectively.

3. The method for preparing the selenium-rich brown sugar according to claim 1, wherein the first condition is that the pH is 5, the temperature is 70-80 ℃, and the enzymolysis time is 1.5-3 h.

4. The method for preparing the selenium-rich brown sugar as claimed in claim 1, wherein the selenium-rich yeast is added in an amount of 15-20 μ g/kg.

5. The method for preparing the selenium-rich brown sugar according to claim 1, wherein the second condition is that the pH is 4.2-4.5, the temperature is 30 ℃, and the enzymolysis is carried out for 1-2 h.

6. The method for preparing the selenium-rich brown sugar as claimed in claim 1, wherein the enzyme deactivation method is heating at 105 ℃ for 10 min.

7. The method for preparing selenium-rich brown sugar according to claim 1, wherein the concentration is performed by ceramic membrane ultrafiltration, the pore diameter of the ceramic membrane is 0.05-0.10 μm, and the ceramic membrane ultrafiltration is performed under the following operating conditions: the transmembrane pressure difference is 0.15-0.27MPa, the filtration temperature is 50-60 ℃, and the membrane surface flow rate is 7-10 m/s.

8. The method for preparing selenium-rich brown sugar according to claim 7, wherein the relative density after concentration is 1.2-1.5.

9. The preparation method of the selenium-rich brown sugar according to claim 1, wherein the sugarcane, the brown granulated sugar and the stevioside are added in a mass ratio of 1000 (5-10) to (2-5).

10. Selenium-rich brown sugar prepared by the preparation method of any one of claims 1-9.

Technical Field

The invention relates to the technical field of brown sugar processing, and particularly relates to selenium-rich brown sugar and a preparation method thereof.

Background

Selenium is a trace element necessary for human bodies, can improve human immunity, has obvious effects of inhibiting and protecting various cancers such as colon cancer, skin cancer, liver cancer, breast cancer and the like, has strong anticancer activity as an intermediate metabolite methyl enol in the organisms, and has the effect of relieving and alleviating heavy metal toxicity. Selenium in human body is mainly obtained from daily diet, and the content of selenium in food directly influences the daily selenium intake of people. Since the lack of selenium can cause common problems of keshan disease, Kaschin-Beck disease, cancer, cardiovascular disease, cataract, cystic fibrosis, hypertension, thyromegaly, immunodeficiency, lymphoblastic anemia, retinal spot degeneration, muscular dystrophy and the like in a human body, the selenium-enriched food becomes hot to the hands with increasing attention on health preservation. The brown sugar also has good health care effect, the contained glucose has fast energy release and high absorption and utilization rate, can quickly supplement physical strength, and has the problems of deficiency of middle-warmer energy, inappetence, malnutrition and the like. The two kinds of foods with health care effects are deeply favored by people, but no report about selenium-rich brown sugar exists at present. Therefore, the preparation process of the selenium-rich brown sugar, which is suitable for industrial production, short in preparation period, high in industrial efficiency and low in production cost, is necessary.

Disclosure of Invention

The invention provides a novel preparation method of selenium-rich brown sugar, which aims to improve the industrialization level, the quality and the health care function of brown sugar.

The invention provides a preparation method of selenium-rich brown sugar, which comprises the following steps:

s1, peeling sugarcane, cutting into sections, juicing, and filtering juice to obtain primary sugarcane juice; adding sucrase and maltase into the primary sugarcane juice, adjusting to a first condition for enzymolysis, adjusting to a second condition, adding selenium-enriched yeast, performing enzymolysis, inactivating enzymes, filtering, and concentrating to obtain concentrated sugarcane juice;

s2, boiling the concentrated sugarcane juice, boiling for 30-50min at 190 ℃ in 150-fold manner, adding brown granulated sugar, stirring and dissolving, boiling for 60-100min at 220-fold manner in 190-fold manner, adding stevioside, stirring and dissolving, boiling for 30-60min at 270 ℃ in 220-fold manner, and cooling to 120 ℃ in 100-fold manner;

s3, spreading the boiled liquid on a cooling bed, neatly marking the liquid by using a marking tool, and packaging and selling the liquid after completely cooling and forming.

As a further improvement of the invention, the addition amounts of the sucrase and the maltase are 1000U/kg and 1200U/kg respectively, and the enzyme activities of the sucrase and the maltase are 300U/g and 500U/g respectively.

As a further improvement of the invention, the first condition is that the pH is 5, the temperature is 70-80 ℃, and the enzymolysis time is 1.5-3 h.

As a further improvement of the invention, the addition amount of the selenium-enriched yeast is 15-20 mug/kg.

As a further improvement of the invention, the second condition is that the pH is 4.2-4.5, the temperature is 30 ℃, and the enzymolysis is carried out for 1-2 h.

As a further improvement of the invention, the enzyme deactivation method is heating at 105 ℃ for 10 min.

As a further improvement of the invention, the concentration method adopts ceramic membrane ultrafiltration, the aperture of the ceramic membrane is 0.05-0.10 μm, and the operating conditions of the ceramic membrane ultrafiltration are as follows: the transmembrane pressure difference is 0.15-0.27MPa, the filtration temperature is 50-60 ℃, and the membrane surface flow rate is 7-10 m/s.

As a further improvement of the invention, the relative density after concentration is 1.2-1.5.

As a further improvement of the invention, the mass ratio of the sugarcane to the brown granulated sugar to the stevioside is 1000 (5-10) to (2-5).

The invention further protects the selenium-rich brown sugar prepared by the preparation method.

The invention has the following beneficial effects: according to the invention, the brown sugar is more fragrant and sweet in taste by adding the selenium-rich yeast, and is rich in selenium element, so that the health-care effect is widened. The method has the advantages that the method can realize industrial continuous production, solves the problem of complex manual operation in the traditional brown sugar production, ensures the green safety of food because no chemical reagent or food additive is added in the processing process, and has the advantages of fine brown to dark brown crystal grains, natural color, less impurity, natural burnt caramel charcoal, strong fragrance, sweet and pleasant taste, fine and smooth mouthfeel, furthest preserves the nutrient components of the sugarcane and has very high nutritional value; the turbidity is below 0.2NTU after the black sugar is dissolved to 12 degrees Bx, the phenomenon of black residue after the black sugar is dissolved is solved, the quality of the black sugar is improved, the added stevioside further improves the sweetness of the black sugar and simultaneously can not increase the blood sugar of a user, and the stevioside is a safe additive.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A preparation method of selenium-rich brown sugar comprises the following steps:

s1, peeling 1000g of sugarcane, cutting into sections, juicing, and filtering juice to obtain primary sugarcane juice; adding sucrase (with the enzyme activity of 300U/g) and maltase (with the enzyme activity of 500U/g) into the primary sugarcane juice, wherein the addition amounts are 1000U/kg and 1200U/kg respectively, adjusting the pH to 5 by using 1mol/LHCl solution, adjusting the temperature to 70 ℃, performing enzymolysis for 1.5h under the conditions that the pH is 4.2 and the temperature is 30 ℃, adding selenium-enriched yeast, the addition amount is 15 mu g/kg, performing enzymolysis for 1h, performing enzyme deactivation, heating at 105 ℃ for 10min, filtering, concentrating, and performing ultrafiltration by using a ceramic membrane, wherein the pore diameter of the ceramic membrane is 0.05 mu m, and the operation conditions of the ultrafiltration by using the ceramic membrane are as follows: transmembrane pressure difference is 0.15MPa, filtering temperature is 50 ℃, membrane surface flow rate is 7m/s, and concentrated sugarcane juice with relative density of 1.2 is obtained;

s2, decocting the concentrated sugarcane juice, decocting for 30min at 150 ℃, adding 5g of brown granulated sugar, stirring for dissolving, decocting for 60min at 190 ℃, adding 2g of stevioside, stirring for dissolving, decocting for 30min at 220 ℃, and cooling to 100 ℃;

s3, spreading the boiled liquid on a cooling bed, neatly marking the liquid by using a marking tool, and packaging and selling the liquid after completely cooling and forming.

Example 2

A preparation method of selenium-rich brown sugar comprises the following steps:

s1, peeling 1000g of sugarcane, cutting into sections, juicing, and filtering juice to obtain primary sugarcane juice; adding sucrase (enzyme activity 300U/g) and maltase (enzyme activity 500U/g) into the primary sugarcane juice, wherein the addition amounts are 1000U/kg and 1200U/kg respectively, adjusting the pH to 5 by using 1mol/LHCl solution, adjusting the temperature to 80 ℃, performing enzymolysis for 3 hours, adjusting the pH to 4.5 and the temperature to 30 ℃, adding selenium-enriched yeast, adjusting the addition amount to 20 mu g/kg, performing enzymolysis for 2 hours, performing enzyme deactivation, heating at 105 ℃ for 10min, filtering, concentrating, and performing ultrafiltration by using a ceramic membrane, wherein the aperture of the ceramic membrane is 0.10 mu m, and the operation conditions of the ultrafiltration by using the ceramic membrane are as follows: transmembrane pressure difference is 0.27MPa, filtering temperature is 60 ℃, membrane surface flow velocity is 10m/s, and concentrated sugarcane juice with relative density of 1.5 is obtained;

s2, decocting the concentrated sugarcane juice, decocting for 50min at 190 ℃, adding 10g of brown granulated sugar, stirring for dissolving, decocting for 100min at 220 ℃, adding 5g of stevioside, stirring for dissolving, decocting for 60min at 270 ℃, and cooling to 120 ℃;

s3, spreading the boiled liquid on a cooling bed, neatly marking the liquid by using a marking tool, and packaging and selling the liquid after completely cooling and forming.

Example 3

A preparation method of selenium-rich brown sugar comprises the following steps:

s1, peeling 1000g of sugarcane, cutting into sections, juicing, and filtering juice to obtain primary sugarcane juice; adding sucrase (with the enzyme activity of 300U/g) and maltase (with the enzyme activity of 500U/g) into the primary sugarcane juice, wherein the addition amounts are 1000U/kg and 1200U/kg respectively, adjusting the pH to 5 by using 1mol/LHCl solution, adjusting the temperature to 75 ℃, performing enzymolysis for 2 hours under the conditions of pH 4.35 and temperature 30 ℃, adding selenium-enriched yeast under the addition amount of 17 mu g/kg, performing enzymolysis for 1.5 hours, performing enzyme deactivation, heating at 105 ℃ for 10min, filtering, concentrating, and performing ultrafiltration by using a ceramic membrane, wherein the pore diameter of the ceramic membrane is 0.07 mu m, and the operation conditions of the ultrafiltration by using the ceramic membrane are as follows: transmembrane pressure difference is 0.22MPa, filtering temperature is 50-60 ℃, membrane surface flow rate is 8m/s, and concentrated sugarcane juice with relative density of 1.35 is obtained;

s2, decocting the concentrated sugarcane juice, decocting for 40min at 170 ℃, adding 5-10g of brown granulated sugar, stirring for dissolving, decocting for 80min at 200 ℃, adding 3.5g of stevioside, stirring for dissolving, decocting for 45min at 240 ℃, and cooling to 110 ℃;

s3, spreading the boiled liquid on a cooling bed, neatly marking the liquid by using a marking tool, and packaging and selling the liquid after completely cooling and forming.

Test example 1

The selenium-rich brown sugar prepared in examples 1-3 of the present invention was tested with ordinary brown sugar (purchased from Zhangzhou mountain food Co., Ltd.) and the results are shown in tables 1 and 2.

TABLE 1

	Product characteristics
		Selenium-rich brown sugar prepared in examples 1-3	The nutrient composition is rich, and the final product has fresh flavor
Common brown sugar	Constant nutrient species and content

TABLE 2

Compared with the prior art, the brown sugar is more fragrant and sweet in taste and rich in selenium elements by adding the selenium-rich yeast, so that the health-care effect is widened. The method has the advantages that the method can realize industrial continuous production, solves the problem of complex manual operation in the traditional brown sugar production, ensures the green safety of food because no chemical reagent or food additive is added in the processing process, and has the advantages of fine brown to dark brown crystal grains, natural color, less impurity, natural burnt caramel charcoal, strong fragrance, sweet and pleasant taste, fine and smooth mouthfeel, furthest preserves the nutrient components of the sugarcane and has very high nutritional value; the turbidity is below 0.2NTU after the black sugar is dissolved to 12 degrees Bx, the phenomenon of black residue after the black sugar is dissolved is solved, the quality of the black sugar is improved, the added stevioside further improves the sweetness of the black sugar and simultaneously can not increase the blood sugar of a user, and the stevioside is a safe additive.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.