Determination method of pasteurization retention time of high-quality milk

A technology of pasteurization and time measurement, which is applied in the direction of material resistance, etc., can solve problems such as loss and loss of nutrients in fresh milk, and achieve the effects of improving control accuracy, stable and reliable equipment support, and reliable and accurate test results

Active Publication Date: 2019-05-03
NEW HOPE DAIRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to a large loss of nutrients in fresh milk, especially some nutrients with high nutritional value and temperature sensitivity, which are more likely to be lost during the sterilization process

Method used

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  • Determination method of pasteurization retention time of high-quality milk
  • Determination method of pasteurization retention time of high-quality milk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Insulated pipe retention time test

[0039]Use soft water (to remove most of the ions, reduce the conductivity of pure water, and improve the measurement accuracy), the equipment is running normally, the water temperature is 24°C-26°C, the homogenization pressure is 19Mpa, and the reflux cycle is used for testing when the sterilizer is not heating up. Put 50ml of 7% and 30% sodium chloride solution into the insulation tube quickly through the needle tube. When the conductivity of No. 1 and No. 2 starts to fluctuate, use a stopwatch to calculate the time. There is no fluctuation, because 50ml of 30% concentration sodium chloride solution is used, before the needle tube is quickly injected into the insulation tube, when the conductivity of No. 1 and No. 2 begins to fluctuate, the time is calculated with a stopwatch. as follows:

[0040] Table 1: The first conductivity change record

[0041]

[0042]

[0043] These 6 sets of data are relatively stable data. Befor...

Embodiment 2

[0045] Insulated pipe retention time test

[0046] The test process is the same as the first test. After adjusting the minimum display value of the conductivity meter to 0.01, the test is performed continuously for 6 times. The specific data are as follows:

[0047] Table 2: The second conductivity change record

[0048] serial number

[0049] It can be seen from the data that the shortest holding time is 24.09 seconds, the longest holding time is 24.41 seconds, and the average holding time is 24.35 seconds. In combination with the test results of Example 1, it can be concluded that because of the starting point of the process design of the Tetra Pak sterilizer, its insulation pipe is longer than that of general pasteurization; in addition, because the displayed flow rate is about 9.1 tons, the low flow rate will also affect the holding time. had an impact. Therefore, Tetra Pak engineers are required to arrive at the site, adjust the flow rate to the rated flow ra...

Embodiment 3

[0051] Insulated pipe retention time test

[0052] The test process and specific values, soft water 10.2 tons, homogeneous pressure 19Mpa, sterilization temperature 85±2°C, disconnect the degassing tank, and adjust the flow rate to the rated flow rate by the engineer. The specific values ​​are as follows:

[0053] Table 3: The third conductivity change record

[0054] serial number

[0055] From the perspective of test time, the soft water test has a minimum holding time of 18.78 seconds, a longest holding time of 19.25 seconds, an average holding time of 19.07 seconds, a maximum deviation of 0.33 seconds, and no negative deviation. Note: The theoretical holding time is calculated based on the 0.8 insurance factor provided by Tetra Pak engineers, 15 seconds / 0.8 = 18.75 seconds.

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Abstract

The invention discloses a method for measuring pasteurization time. The method comprises the following steps: (1) forming at least one detection hole in each of the front end and the back end of a pasteurization insulation tube, that is, forming a front-end detection hole and a back-end detection hole, and mounting at least one potential monitoring probe inside each of the front-end detection hole and the back-end detection hole respectively; (2) arranging a needle opening at a 1-50cm position of the upstream of the front-end detection hole for injecting salt water; (3) starting pasteurization equipment, substituting milk with water, and enabling water to flow in the equipment in the flowing form of milk in a normal pasteurization process; (4) injecting the salt water from the needle opening, monitoring potential changes of the potential monitoring probes at the front-end detection hole and the back-end detection hole, and recording the appearance time difference between potential peaks of the two. By the method for measuring the pasteurization retention time of the high-quality milk, the retention time in the pasteurization process is measured by a potentiometric method, so that the control precision of the retention time in the pasteurization process is improved, and a stable and reliable equipment guarantee is provide for preparation of the high-quality milk.

Description

technical field [0001] The invention relates to a method for measuring sterilization time, in particular to a method for measuring pasteurization retention time, which belongs to a part of a method for optimizing high-quality milk. The focus of the invention is to optimize the accuracy of the sterilization time of high-quality milk, improve the sterilization efficiency, and reduce the loss of nutrients during sterilization. Background technique [0002] According to the source and processing method, milk can be divided into: fresh milk, pasteurized milk, UHT milk, reconstituted milk, etc. Among them, fresh milk has the highest nutritional value. After sterilization, some nutrients in milk will be lost, especially after two high-temperature treatments in reconstituted milk, the nutritional value will be the greatest. It is generally recommended that students drink fresh milk or pasteurized milk. Get higher nutritional value. [0003] Compared with pasteurized milk and UHT m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/08
CPCG01N27/08
Inventor 袁雄雄刘丹刘海燕夏忠悦付永猛陈龙唐果安保森张海涛林永裕
Owner NEW HOPE DAIRY CO LTD
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