CN115868586A - Method for improving soluble dietary fiber in lotus root juice through high-pressure microjet homogenization - Google Patents
Method for improving soluble dietary fiber in lotus root juice through high-pressure microjet homogenization Download PDFInfo
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- CN115868586A CN115868586A CN202111132242.2A CN202111132242A CN115868586A CN 115868586 A CN115868586 A CN 115868586A CN 202111132242 A CN202111132242 A CN 202111132242A CN 115868586 A CN115868586 A CN 115868586A
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- 235000006508 Nelumbo nucifera Nutrition 0.000 title claims abstract description 95
- 240000002853 Nelumbo nucifera Species 0.000 title claims abstract description 95
- 235000011389 fruit/vegetable juice Nutrition 0.000 title claims abstract description 58
- 235000013325 dietary fiber Nutrition 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000000265 homogenisation Methods 0.000 title description 4
- 238000001035 drying Methods 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 17
- 239000006185 dispersion Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
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- 238000012545 processing Methods 0.000 abstract description 4
- 230000035790 physiological processes and functions Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 9
- 235000013305 food Nutrition 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
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- 239000004480 active ingredient Substances 0.000 description 3
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- 210000004369 blood Anatomy 0.000 description 3
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- 229920002472 Starch Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 150000001720 carbohydrates Chemical group 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 2
- 235000011437 Amygdalus communis Nutrition 0.000 description 1
- 244000144725 Amygdalus communis Species 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 235000020224 almond Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 235000012055 fruits and vegetables Nutrition 0.000 description 1
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- 150000004676 glycans Chemical class 0.000 description 1
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- 150000002632 lipids Chemical class 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 150000002989 phenols Chemical class 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/87—Re-use of by-products of food processing for fodder production
Abstract
The invention discloses a method for preparing lotus root juice with high dietary fiber content by using a high-pressure micro-jet technology, and belongs to the field of agricultural product processing. The method comprises the steps of juicing lotus roots, separating to obtain lotus root residues and original lotus root juice, drying and superfine grinding the lotus root residues, adding the original lotus root juice according to the mass volume fraction of 0.5-3.0%, and treating for 1-7 times under the pressure of 80-180 Mpa to obtain the lotus root juice with the soluble dietary fiber content of 310-460 mg/100 mL. The method not only promotes the full utilization of the lotus root residue, but also enhances the physiological function and state stability of the lotus root juice.
Description
Technical Field
The invention belongs to the field of agricultural product processing, and particularly relates to a method for preparing lotus root juice with high dietary fiber content by using a high-pressure micro-jet technology.
Background
The high-pressure micro-jet homogenizing technology is a new processing technology, the working pressure of the high-pressure micro-jet homogenizing technology can reach 200MPa, and materials instantaneously pass under the pushing of the pressure and are subjected to the composite action of mechanical forces such as shearing, collision, crushing and the like, so that the physical and chemical properties or the structure of the materials are influenced. Different from static ultrahigh pressure homogenization, in the ultrahigh pressure micro-jet flow treatment process, the material compression time is short, the pressure change rate is high, and a stronger homogenization effect can be achieved under relatively low pressure. The high-pressure micro-jet equipment can realize nano dispersion, the thinning effect can reach 0.1 mu m or below, the cell wall breaking and the macromolecule depolymerization can be realized by combining the treatment of factors such as temperature and the like, and the research on the aspects of active ingredient extraction, macromolecule physicochemical modification and the like is widely carried out.
Dietary fiber is a carbohydrate linked by ten or more monomers, as defined by the 2009 international food code Commission (CAC), which is not hydrolyzed by enzymes in the human small intestine and is an edible carbohydrate that can be extracted from natural food materials by physical, enzymatic or chemical methods and is beneficial to human physiological health. Depending on solubility, it can be divided into Soluble Dietary Fiber (SDF) and Insoluble Dietary Fiber (IDF), collectively referred to as Total Dietary Fiber (TDF). SDF is generally considered to have better physiological activity, including lowering blood glucose, lowering blood lipid, regulating the intestine, and the like. The ratio of SDF in dietary fiber of food is increased, and the better physiological action is brought into play.
The high-pressure micro-jet technology can be used for changing the microstructure of protein, polysaccharide, polyphenol, grease and other components in food and enhancing the stability of liquid food, such as almond protein beverage (CN 201910004038.9) and blackberry pulp (CN 201910056662.3). In addition, the SDF content of tomato paste can be increased when the tomato paste is used for treating tomato paste (CN 202110157950.5).
The lotus root is used as the aquatic vegetable with the highest yield in China, is rich in various physiological active ingredients such as dietary fiber, polyphenol and the like, and has wide attention on the functions of reducing blood sugar and fat and the like. The lotus root beverage is also a classic fruit and vegetable juice beverage, and has a commercial production history of about 30 years. However, lotus root residue with the mass as high as 40% can be generated in the lotus root juice processing, and the lotus root residue is the enrichment part of active ingredients such as dietary fiber and the like. If the lotus root residue is treated by the conventional grinding and homogenizing measures and the like, the increase proportion of the soluble components of the lotus root residue is low, and the lotus root residue is obviously layered. Therefore, the loss of functional components such as dietary fiber and phenols in the lotus root juice and the distribution stability of the lotus root juice become important factors influencing the upgrading of the lotus root juice product.
Disclosure of Invention
The invention provides a lotus root juice preparation method for promoting modification of dietary fiber and increasing the proportion of soluble dietary fiber through physical pulse pressure. The method is realized by the following technical scheme:
1) Cleaning fresh lotus root, crushing, squeezing, performing solid-liquid separation to obtain solid lotus root residue, and standing or centrifuging the liquid part to obtain supernatant as original lotus root juice;
2) Drying the lotus root residue obtained in the step 1) in a drying oven at 60 ℃ for 16 hours, grinding and crushing the lotus root residue into powder, and sieving the powder with a 200-mesh sieve;
3) Adding the lotus root residue powder obtained in the step 2) into the original lotus root juice obtained in the step 1) according to the mass volume fraction of 0.5-3.0%, uniformly mixing, and homogenizing for 15min by using a high-speed homogenizer at 8000 r/min;
4) Treating the homogenate obtained in the step 3) for 1-7 times under 80-180 Mpa in a high-pressure micro-jet device;
preferably, the addition amount of the lotus root residue powder in the step 2) is 1.0-2.5%;
preferably, the treatment pressure in the step 4) is 90-120 MPa, and the cycle time is 1-5 times.
The SDF content in the soluble dietary fiber content in the lotus root juice obtained in the step 4) is 310-450 mg/100mL, the granularity is 1198-2645 nm, and the dispersion index is 0.547-0.663.
Advantageous effects
The invention provides a method for preparing lotus root juice with high dietary fiber content, which only reduces the waste of lotus root residues through a physical method, improves the physiological function of the lotus root juice and enhances the stability of the lotus root juice. The method has the advantages that the content of dietary fiber, particularly soluble dietary fiber in the lotus root juice can be greatly improved through high-pressure micro-jet treatment, and the stability of a lotus root juice system is improved. Compared with the original lotus root juice obtained by direct squeezing, the SDF content in the finally obtained lotus root juice is increased by 37-130%, the granularity of the lotus root juice is reduced to 16.8-37.0% before high-pressure micro-jet treatment, and the dispersion index is improved by 3.9-4.6 times.
Detailed Description
The invention provides a preparation method for improving the content of dietary fiber in lotus root juice and simultaneously increasing the stability, which takes fresh lotus roots as raw materials and comprises the following steps:
1) Crushing fresh lotus roots, squeezing and separating to obtain solid lotus root residues, standing or centrifuging the pulp part, and taking supernatant to obtain lotus root juice;
2) Drying the lotus root residue obtained in the step 1) in a drying oven at 60 ℃ for 16h, preparing the lotus root residue into powder by using an ultrafine grinder, and sieving the powder by using a 200-mesh sieve;
3) Adding the lotus root residue powder obtained in the step 2) into the original lotus root juice obtained in the step 1) according to the mass volume fraction of 0.5-3.0%, uniformly mixing, and homogenizing for 15min by using a high-speed homogenizer 8000 r/min;
4) Treating the homogenate obtained in the step 3) for 1-7 times in a high-pressure micro-jet device under 80-180 MPa.
In the invention, the fresh lotus roots are preferably crisp lotus roots with the water content higher than 70-90%, and the lotus roots are crushed after being cleaned.
In the invention, the extrusion is a stress mode of lotus root juice output, the primary separation of juice and residues can be realized, the starch in the lotus root mainly enters a liquid part, and the starch and other solid matters can be removed through standing, sedimentation and centrifugation.
In the invention, the mass fraction of the dietary fiber in the dried lotus root residue is 30-70%, and the particle size of the powder after the superfine grinding is 10-25 μm.
In the invention, the lotus root juice obtained in the step 1) is clear juice, the turbidity value is 3.8-6.5 NTU, the dried lotus root residue is added in the step 3) and is in a turbid state after being homogenized, and the lotus root juice is obviously layered after standing for 30min, wherein the turbidity value of the upper layer is 55-78 NTU.
In the invention, the turbid juice with the turbidity of 750 to 830NTU is obtained in the step 4), wherein the SDF content is 310 to 460mg/100mL, the granularity is 1198 to 2645nm, and the dispersion index is 0.547 to 0.663.
In the embodiment of the invention, the turbidity of the lotus root juice is measured by a turbidity meter, and the specific method comprises the following steps: after 80mL of the mixture is taken out and is kept stand in a 100mL measuring cylinder for 2 hours, the solution at the scale of 60mL is absorbed, and the measurement is carried out after the reference of DL/T809-2002 water quality-turbidity and the calibration by the standard solution of the fumarazine.
In the embodiment of the invention, the soluble dietary fiber in the lotus root juice is measured by the following specific measuring method: after lotus root juice is freeze-dried in vacuum, the method is carried out according to GB 5009.88-2014 determination of dietary fiber in food.
In the embodiment of the invention, the granularity and the dispersion coefficient of the lotus root juice are measured by the following specific measuring method: diluted 20 times with distilled water and measured with Nicomp 3802300 nanometer particle sizer, USA PSS.
Example 1
1.0kg of crisp lotus roots with the water content of 80 percent are purchased in the market, 1) the crisp lotus roots are cleaned, cut into lotus root sections of 5-12 cm in cross, cut into strips in quarter and longitudinal directions, squeezed by a household normal juice machine (Jiuyang JYZ-E81) to realize juice and residue separation to obtain 450g of wet residues, and the liquid part is centrifuged at 4000r/min to obtain 500mL of supernatant juice as original lotus root juice. 2) And (3) drying the wet residues in a 60 ℃ oven for 16h, preparing the wet residues into powder by using an ultrafine grinder, and sieving the powder by using a 200-mesh sieve to obtain 42g of lotus root residue ultrafine powder. 3) Adding the obtained lotus root residue powder 2.0g into 100mL of original lotus root juice, uniformly mixing, and homogenizing for 15min by using a high-speed homogenizer at 8000 r/min. 4) And (3) placing the homogenized lotus root juice in a high-pressure micro-jet device under the pressure of 120MPa, and treating for 3 times.
And (3) measuring the SDF content, turbidity, granularity and dispersion index of the raw lotus root juice obtained in the step 1), the homogenate obtained in the step 3) and the lotus root juice obtained in the step 4).
Example 2
The difference from the example 1 is that the addition amount of the lotus root residue powder in the step 3) is 0.5g per 100mL of lotus root juice.
Example 3
The difference from example 1 is that the number of times of treatment of the high-pressure microjet in step 4) is 1.
Example 4
The difference from example 1 is that the number of times of treatment of the high-pressure microjet in step 4) is 7.
Comparative example 1
The difference from the example 1 is that the lotus root juice is originally prepared in the step 1) of the example 1.
Comparative example 2
The difference from example 1 is that the homogenate obtained by drying the lotus root residue in step 3) of example 1 is added. The data are detailed in table 1.
TABLE 1 SDF content, turbidity, particle size and Dispersion coefficient of the Lotus root juice
| SDF content (g/100 mL) | turbidity/NTU | Particle size/nm | Coefficient of dispersion | |
| Example 1 | 0.46 | 810 | 1750.3 | 0.654 |
| Example 2 | 0.31 | 750 | 2645.6 | 0.663 |
| Example 3 | 0.40 | 814 | 1936.62 | 0.590 |
| Example 4 | 0.37 | 796 | 1198.07 | 0.655 |
| Comparative example 1 | 0.20 | 4.7 | 323.5 | 0.341 |
| Comparative example 2 | 0.27 | 65 | 7142.9 | 0.145 |
Example 1 compared with comparative example 1, the SDF content in the lotus root juice obtained in example 1 is 2.30 times that in comparative example 1, and the turbidity is improved by 172 times.
Example 1 compared to comparative example 2, the SDF content in the lotus root juice obtained in example 1 is 1.70 times that of comparative example 1, while the particle size is reduced to 24.5% of that of comparative example 1, and the dispersion coefficient is improved by 4.51 times.
The embodiments of the present invention have been described in detail above, but this is only an example for easy understanding and should not be construed as limiting the scope of the present invention. Also, various equivalent changes or substitutions are possible for those skilled in the art according to the technical solution of the present invention and the description of the preferred embodiment thereof, and all such changes or substitutions shall fall within the protection scope of the claims of the present invention.
Claims (4)
1. A method for preparing high dietary fiber lotus root juice by a high-pressure microjet method specifically comprises the following steps:
1) Cleaning fresh lotus root, crushing, squeezing, performing solid-liquid separation to obtain solid lotus root residue, and standing or centrifuging the liquid part to obtain supernatant as original lotus root juice;
2) Drying the lotus root residue obtained in the step 1) in a drying oven at 60 ℃ for 16h, preparing the lotus root residue into powder by using an ultrafine grinder, and sieving the powder by using a 200-mesh sieve;
3) Adding the lotus root residue powder obtained in the step 2) into the original lotus root juice obtained in the step 1) according to the mass volume fraction of 0.5% -3.0%, uniformly mixing, and homogenizing for 15min by using a high-speed homogenizer at 8000 r/min;
4) Treating the homogenate obtained in the step 3) for 1-7 times in a high-pressure micro-jet device under 80-180 Mpa to obtain the lotus root juice with high dietary fiber content.
2. The method for improving dietary fiber in lotus root juice according to claim 1, wherein the preferable addition amount of lotus root residue powder in the step 3) is 1.0-2.5%.
3. The method for improving the dietary fiber in the lotus root juice according to claim 1, wherein the preferable treatment pressure of the high-pressure micro-jet in the step 3) is 90-120 Mpa, and the preferable cycle time is 1-5 times.
4. The method for improving dietary fiber in lotus root juice according to claim 1, wherein the content of soluble dietary fiber in the lotus root juice in the step 4) is 310-460 mg/100mL, the granularity is 1198-2645 nm, and the dispersion index is 0.547-0.663.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103445187A (en) * | 2012-05-30 | 2013-12-18 | 华中农业大学 | Preparation method of soluble dietary fiber prepared from lotus rhizome nodes |
| CN103652726A (en) * | 2013-12-09 | 2014-03-26 | 浙江一派食品有限公司 | Lotus root starch manufacturing technology based on complete utilization of lotus root |
| CN105831775A (en) * | 2016-03-30 | 2016-08-10 | 浙江科技学院 | Method for improving soluble meal fiber content of lotus rhizome slag |
| CN107897787A (en) * | 2017-09-07 | 2018-04-13 | 江南大学 | A kind of preparation method of full lotus root juice and full lotus root starch |
-
2021
- 2021-09-26 CN CN202111132242.2A patent/CN115868586A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103445187A (en) * | 2012-05-30 | 2013-12-18 | 华中农业大学 | Preparation method of soluble dietary fiber prepared from lotus rhizome nodes |
| CN103652726A (en) * | 2013-12-09 | 2014-03-26 | 浙江一派食品有限公司 | Lotus root starch manufacturing technology based on complete utilization of lotus root |
| CN105831775A (en) * | 2016-03-30 | 2016-08-10 | 浙江科技学院 | Method for improving soluble meal fiber content of lotus rhizome slag |
| CN107897787A (en) * | 2017-09-07 | 2018-04-13 | 江南大学 | A kind of preparation method of full lotus root juice and full lotus root starch |
Non-Patent Citations (4)
| Title |
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| 刘成梅, 刘伟, 林向阳, ROGER RUAN: "Microfluidizer对膳食纤维溶液物理性质的影响", 食品科学, no. 02, pages 72 - 75 * |
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