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Method of producing concentrated liquid dairy products

A technology for concentrated milk and dairy products, applied in the field of preparing concentrated liquid dairy products

Inactive Publication Date: 2008-07-02
INTERCONTINENTAL GREAT BRANDS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, a 7-fold increase in bacterial contamination after ultrafiltration is not uncommon
Therefore, the commonly used, recognized filtration techniques used to provide highly concentrated dairy products do not overcome the above-mentioned disadvantages, and the use of heat treatment to provide sterile or substantially sterile concentrates is still required.

Method used

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  • Method of producing concentrated liquid dairy products

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Example 1. Concentration of skim milk (Elgin Diary, Illinois) at 120°F (about 3.2% protein, about 2.5% lactose and less than about 0.1% fat) to produce about 4.4X dairy concentrate / retentate with about 14% protein, 1.5% lactose and 2% fat. Ultrafiltration was performed at 25-35 psig and 115-125°F. After ultrafiltration, the dairy concentrate has about 1.2 x 10 4 Colony forming units per gram (cfu / g) of microbial spores.

[0041] The 4.4X dairy concentrate was then passed through a microfiltration membrane (Membralox Filter, Pall Company, New York) having an average pore size of about 1.4 microns at about 120[deg.]F and 20-30 psig. About 80 lbs of dairy concentrate was filtered using microfiltration membranes to obtain about 75 lbs of permeate (sterile concentrated milk) and about 5 lbs of retentate. The permeate has about 14% protein, about 1.5% lactose, and about 2% fat, making about a 4.4x milk concentrate (ie, 14% protein in concentrate divided by 3.2% protein in ...

Embodiment 2

[0043] Example 2. Concentrate skim milk in the manner provided in Example 1. Microbial contamination levels were measured before and after microfiltration using the procedure of Example 1. The results are shown in Table 3 below. This result demonstrates that milk concentration prior to microfiltration forms concentrated milk that does not require significant heat treatment prior to subsequent use.

[0044] table 3

[0045] sample

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PUM

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Abstract

A method is provided for forming aseptic or substantially aseptic concentrated dairy liquid, such as dairy milk, without significant heat treatment. In one form, the method first concentrates a starting dairy milk to about 2X to about 7X concentration using an ultrafiltration membrane to form a dairy concentrate. Thereafter, the dairy concentrate is filtered using a microfiltration membrane to provide the aseptic or substantially aseptic concentrated dairy milk. The resultant concentrated dairy milk has less than about 0.5 percent total bacteria and less than about 5 colony forming units of spore forming bacteria per gram. The substantially aseptic concentrated dairy milk is not subjected to significant heat treatment during processing.

Description

technical field [0001] The present invention relates to a method of preparing a concentrated liquid dairy product, and more particularly to a method of preparing an aseptic or substantially aseptic concentrated liquid dairy product without significant heat treatment. In another form, the present invention also relates to concentrated dairy liquid products, in particular to aseptic or substantially sterile concentrated dairy liquid products obtained without significant heat treatment. Background technique [0002] It is generally desirable to concentrate liquid dairy products, such as milk, because the volume of storage and transportation can be reduced after concentration, thereby reducing storage and transportation costs. Liquid milk concentrates also allow dairy products to be packaged and used in a more efficient manner. For example, with the popularity of beverage-on-demand systems that serve single-serving hot and cold beverages, beverage concentrates are often availab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23C1/00A23C3/00
CPCA23C3/00A23C9/1422A23C2210/202A23C19/05
Inventor J·A·赫斯特金C·D·加勒
Owner INTERCONTINENTAL GREAT BRANDS LLC
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