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Low-lactose and lactose-free milk product and process for production thereof

A technology of dairy products and lactose, applied in the field of nanofiltration technology, low lactose or lactose-free milk, to achieve the effect of loss avoidance and efficient recovery

Inactive Publication Date: 2011-07-20
VALIO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process described in said patent publication involving single-stage nanofiltration, all of the monovalent minerals were not returned to the milk efficiently enough

Method used

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  • Low-lactose and lactose-free milk product and process for production thereof
  • Low-lactose and lactose-free milk product and process for production thereof
  • Low-lactose and lactose-free milk product and process for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1: Single stage nanofiltration of hydrolyzed skim milk with Desal 5DL membrane (K=3)

[0064] With 0.08% dose of Godo YNL2 lactase (Godo Shusei Company, Japan), skimmed milk (20L) was hydrolyzed (9°C, 18 hours), and at a temperature of 10°C to 18°C ​​and a pressure of 12 to 21 bar to Desal 5DL membrane (GE Osmonics, USA) was used for nanofiltration. The permeate flow is 5.71 / m 2 h~9.61 / m 2 h. Continue to perform nanofiltration until the concentration factor is 3, the retentate volume is 6.7L, and the permeate volume is 13.3L.

[0065] Samples were taken from the feed consisting of hydrolyzed skim milk, the obtained NF retentate and NF permeate, on the basis of which samples protein, dry matter, glucose, galactose, ash and calcium were determined (Table 1).

[0066] Table 1: Nanofiltration Retentate and Permeate Composition

[0067]

[0068] Based on the above results it can be seen that, in fact, calcium was not lost to the permeate but remained in the s...

Embodiment 2

[0069] Example 2: Three-stage nanofiltration of hydrolyzed skim milk combined with RO filtration (membrane Desal DK + diafiltration + membrane Filmtec NF)

[0070] 0.06% Godo YNL2 lactase (Godo Shusei Company, Japan) was added to skim milk (20 L), and hydrolyzed at 10° C. for 18 hours. At this time, the residual lactose content of the skim milk was 0.03%. The hydrolyzed skim milk thus obtained was subjected to nanofiltration at 10°C to 15°C. The filter membrane is Desal 5DK (GE Osmonics, USA), the pressure is 13 bar to 19 bar, and the permeate flow is 8.4 l / m 2 h~10.5l / m 2 h. The hydrolyzed skim milk was first filtered with a concentration factor of 2, which meant that a total of 10 L of permeate was removed from the unit. Diafiltration was then performed by adding diafiltration water (5 L) to NF Retentate I (10 L) at the same rate as NF Permeate II was produced. The permeate from the first nanofiltration stage and the permeate obtained by diafiltration are recovered and ...

Embodiment 3

[0080] Example 3: Two-stage nanofiltration of hydrolyzed skim milk (membranes Desal 5DL (K=3) and Filmtec NF (K=6))

[0081] The staged nanofiltration of lactose-hydrolyzed skim milk was tested as follows: the first stage was carried out under warm conditions, and the NF permeate I obtained in the first stage was subjected to nanofiltration in a second stage under cool conditions to recover minerals .

[0082] Skim milk (40 L) was hydrolyzed (9°C, 18 hours) with Godo YNL2 lactase (Godo Shusei Company, Japan) at a dose of 0.08%, as described above. The hydrolyzed skim milk was subjected to nanofiltration at a temperature of 47°C to 51°C. The filter membrane was Desal 5DL (GE Osmonics, USA). Increase the pressure to keep the liquid flow constant. During the experiment, the permeate flow was 8.1 l / m 2 h~9.6l / m 2 h, the pressure is 4 bar to 6.4 bar. Filtration was continued until the concentration factor was 3.

[0083] The feed, retentate and permeate were sampled on the b...

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PUM

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Abstract

The invention relates to a process for separating milk components, wherein proteins, sugars and minerals are separated into different fractions. The lactose of milk is first hydrolyzed completely or partially, after which proteins, minerals and sugars are separated into fractions in a grading nanofiltration. The obtained fractions may also be further processed by chromatography, membrane techniques, and / or evaporation to further improve the separation of said components. The invention aiso relates to a low-lactose or lactose-free miik composed of these fractions. By means of the invention, calcium and protein fosses can be minimized. Also, the energy content of the product can be reduced.

Description

technical field [0001] The present invention relates to a method of separating a milk component into components, and to low-lactose or lactose-free milk consisting of these components. The invention particularly relates to the use of nanofiltration techniques in the separation of milk components. Background technique [0002] Several methods are known for producing low-lactose and lactose-free milk using membrane technology. Conventional enzymatic methods of cleaving lactose are also known in the art and include the step of adding lactase from fungi and yeasts to milk so that more than 80% of the lactose is cleaved into simple sugars (i.e., glucose and galactose). [0003] Several membrane filtration solutions have been proposed to remove lactose from dairy raw materials. Four basic membrane filtration methods are commonly used: reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF) and microfiltration (MF). Among them, UF is mainly suitable for separating lacto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23C9/00A23C9/14
CPCA23C9/1206A23C9/1422
Inventor 哈利・卡里奥宁雷塔・蒂卡玛克
Owner VALIO LTD
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