CN101589739B - Comprehensive treatment method for removing melamine from dairy product - Google Patents
Comprehensive treatment method for removing melamine from dairy product Download PDFInfo
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- CN101589739B CN101589739B CN2009100166580A CN200910016658A CN101589739B CN 101589739 B CN101589739 B CN 101589739B CN 2009100166580 A CN2009100166580 A CN 2009100166580A CN 200910016658 A CN200910016658 A CN 200910016658A CN 101589739 B CN101589739 B CN 101589739B
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Abstract
The invention discloses a comprehensive treatment method for removing melamine from a dairy product, which mainly comprises the following steps: (1) pretreatment of the dairy product, namely preheating solution of the dairy product to between 20 and 40 DEG C, keeping the temperature constant, then pre-filtering the solution, and removing fine suspended substances; and (2) nano-filtration treatment, namely using a nano-filtration film with the trapping relative molecular mass of more than 100 to carry out concentration and separation for the pretreated dairy product solution under the working pressure of 0.8 to 2.8 MPa at the temperature of between 20 and 40 DEG C to separate the effective components of the dairy product and the melamine, wherein the nano-filtration trapped liquid is the dairy product solution which is removed with the melamine, the concentration is 1 to 5 times of that of the primary liquid, and the nano-filtration permeating liquid is the solution containing the melamine. The method has the advantages that the method adopts pretreatment and nano-filtration integrating process, integrates the removal of melamine and the enrichment of the effective components of the dairy product, and has high automation degree, simple and convenient operation, high treatment efficiency and energy conservation.
Description
Technical field
The present invention relates to a kind of integrated conduct method of removing melamine from dairy product, specifically adopt preliminary treatment and nanofiltration integrated technology to handle dairy products solution, enrichment dairy products active ingredient removes the melamine in the dairy products.
Background technology
Dairy products comprise milk, sour milk, milk powder, milk drink etc., contain active ingredients such as a large amount of albumen, lactose, and human beings'health is played an important role.Yet because some people is for individual private interests, melamine is added in the raw material milk, thereby the dairy products that cause human body to exceed standard owing to the long-term drinking content of melamine produce diseases such as kidney stone, renal failure, serious harm human beings'health, especially serious harm drink for a long time the infant's of milk powder and milk health in a large number.
Summary of the invention
At the problem of above-mentioned existence, the object of the present invention is to provide a kind of integrated conduct method of removing melamine from dairy product, to improve the concentration and the purity of active ingredient in the dairy products, improve the security that it is quoted.
The present invention is achieved by the following technical solutions:
The integrated conduct method of described removing melamine from dairy product may further comprise the steps:
(1) preliminary treatment of dairy products: the solution of dairy products is preheated to 20～40 ℃, and keeps constant temperature, then solution is carried out pre-filtering, remove tiny suspension;
(2) nanofiltration is handled: using and holding back relative molecular mass is NF membrane more than 100, in operating pressure is 0.8-2.8MPa, temperature is under 20-40 ℃ the condition, to carrying out concentrating and separating through pretreated dairy products solution, dairy products active ingredient is separated with melamine, for removing the dairy products solution of melamine, active ingredient concentration is 1-5 times of stoste in the nanofiltration trapped fluid, and it is the solution that contains melamine that nanofiltration sees through liquid.
Nanofiltration of the present invention is treated to one-level or the secondary nanofiltration is handled; Described NF membrane is rolled film or flat sheet membrane, and material is cellulose acetate or aromatic polyamides.
Above-mentioned pre-filtered condition is: filter with accurate filter, bag filter or ultrafiltration apparatus, filtering accuracy is 1-20 μ m, and operating pressure is 0.2-0.6MPa.The material of described ultrafiltration apparatus is cellulose acetate, polyacrylonitrile, polysulfones or Kynoar, and molecular cut off is 20000-200000.
For guaranteeing treatment effect preferably, prolong the service life of film, every operation need be cleaned one time nanofiltration device in one day at least, and cleaning method is to clean with hot water earlier, cleans with alkaline solution again, makes nanofiltration device recover disposal ability fully.
The invention has the advantages that and adopt preliminary treatment and nanofiltration integrated technique, integrate except that melamine and enrichment dairy products active ingredient, automaticity height, easy and simple to handle, treatment effeciency height, energy savings.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
With content of melamine is the solution that obtains after the milk powder water dissolving of 50mg/kg, is heated to 30 ℃ with heat exchanger, removes wherein fine suspension with accurate filter or bag filter again, and operating pressure 0.2-0.6MPa enters circulating tank; Enter nanofiltration equipment then under the effect of high-pressure pump, operating pressure 1.6MPa obtains dairy products active ingredient pregnant solution and the permeate water solution that contains melamine, and content of melamine is 2mg/kg in the pregnant solution after testing, and the melamine removal efficiency reaches 96%.The every operation of nanofiltration device is cleaned once in one day at least, and cleaning method is to use 30-45 ℃ hot water injection earlier, and the NaOH solution with pH=10-11 cleans again, makes nanofiltration device recover disposal ability fully.Use the coiled reverse osmosis membrane of material as cellulose acetate in nanofiltration device, its molecular cut off is more than 100.
Embodiment 2
The raw material milk that will contain melamine is heated to 25 ℃ with heat exchanger, and with ultrafiltration removal fine suspension wherein, operating pressure 0.2-0.6MPa enters circulating tank again; Under the effect of high-pressure pump, enter nanofiltration equipment then, operating pressure 1.8MPa, replenish the pure water of 4 times of volumes of raw material milk in the nanofiltration process to circulating tank, obtain dairy products active ingredient pregnant solution and the permeate water solution that contains melamine, the every operation of nanofiltration device is cleaned once in one day at least, cleaning method is to use 30-45 ℃ hot water injection earlier, and the alkaline solution with pH=10-11 cleans again, makes nanofiltration device recover disposal ability fully.Use the coiled reverse osmosis membrane of material as polyamide in nanofiltration device, its molecular cut off is more than 100.Use rolling or the doughnut formula milipore filter of material as polyacrylonitrile or polysulfones or Kynoar in ultrafiltration apparatus, its molecular cut off is 20000-200000.Content of melamine is 150mg/kg before handling, and handling the back content of melamine is 1.5mg/kg, and the melamine removal efficiency reaches 99%.
Embodiment 3
The raw material milk that will contain melamine is heated to 20 ℃ with heat exchanger, and with ultrafiltration removal fine suspension wherein, operating pressure 0.2-0.6MPa enters circulating tank again; Under the effect of high-pressure pump, enter nanofiltration equipment then, operating pressure 2.0MPa, replenish the pure water of 2 times of volumes of raw material milk in the nanofiltration process to circulating tank, obtain dairy products active ingredient pregnant solution and the permeate water solution that contains melamine, the every operation of nanofiltration device is cleaned once in one day at least, cleaning method is to use 30-45 ℃ hot water injection earlier, and the NaOH solution with pH=10-11 cleans again, makes nanofiltration device recover disposal ability fully.Use the coiled reverse osmosis membrane of material as polyamide in nanofiltration device, its molecular cut off is more than 100.Use rolling or the doughnut formula milipore filter of material as polyacrylonitrile or polysulfones or Kynoar in ultrafiltration apparatus, its molecular cut off is 20000-200000.Content of melamine is 80mg/kg before handling, and handling the back content of melamine is 1.2mg/kg, and the melamine removal efficiency reaches 98.5%.
What more than enumerate only is specific embodiments of the invention.Obviously, the invention is not restricted to the foregoing description, many operative combination can also be arranged.The all scenario that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (5)
1. the integrated conduct method of a removing melamine from dairy product is characterized in that may further comprise the steps:
(1) preliminary treatment of dairy products: the solution of dairy products is preheated to 20～40 ℃, and keeps constant temperature, then solution is carried out pre-filtering, remove tiny suspension;
(2) nanofiltration is handled: using and holding back relative molecular mass is NF membrane more than 100, in operating pressure is 0.8-2.8MPa, temperature is under 20-40 ℃ the condition, to carrying out concentrating and separating through pretreated dairy products solution, in the nanofiltration trapped fluid dairy products solution that removes melamine, concentration is 1-5 times of stoste, and it is the solution that contains melamine that nanofiltration sees through liquid.
2. the integrated conduct method of removing melamine from dairy product according to claim 1 is characterized in that: described nanofiltration is treated to one-level or the secondary nanofiltration is handled.
3. the integrated conduct method of removing melamine from dairy product according to claim 1 and 2, it is characterized in that: described pre-filtered condition is: filter with accurate filter, bag filter or ultrafiltration apparatus, filtering accuracy is 1-20 μ m, and operating pressure is 0.2-0.6MPa.
4. the integrated conduct method of removing melamine from dairy product according to claim 3, it is characterized in that: the material of described ultrafiltration apparatus is cellulose acetate, polyacrylonitrile, polysulfones or Kynoar, molecular cut off is 20000-200000.
5. the integrated conduct method of removing melamine from dairy product according to claim 3, it is characterized in that: described NF membrane is rolled film or flat sheet membrane, material is cellulose acetate or aromatic polyamides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100166580A CN101589739B (en) | 2009-07-01 | 2009-07-01 | Comprehensive treatment method for removing melamine from dairy product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100166580A CN101589739B (en) | 2009-07-01 | 2009-07-01 | Comprehensive treatment method for removing melamine from dairy product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101589739A CN101589739A (en) | 2009-12-02 |
| CN101589739B true CN101589739B (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100166580A Expired - Fee Related CN101589739B (en) | 2009-07-01 | 2009-07-01 | Comprehensive treatment method for removing melamine from dairy product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021048427A1 (en) * | 2019-09-12 | 2021-03-18 | Hipp & Co | Processes for the manufacture of perchlorate depleted milk |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102217672B (en) * | 2010-04-14 | 2013-06-05 | 三达膜科技（厦门）有限公司 | Method for removing melamine from milk products |
| EP4307909A1 (en) | 2021-03-17 | 2024-01-24 | Hipp & Co | Processes for the manufacture of perchlorate depleted milk products |
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2009
- 2009-07-01 CN CN2009100166580A patent/CN101589739B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021048427A1 (en) * | 2019-09-12 | 2021-03-18 | Hipp & Co | Processes for the manufacture of perchlorate depleted milk |
| EP4070664A1 (en) * | 2019-09-12 | 2022-10-12 | Hipp & Co | A perchlorate depleted milk retentate |
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| Publication number | Publication date |
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| CN101589739A (en) | 2009-12-02 |
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