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Application of positive infiltration technology using antiseptic as draw solution in product concentration

A forward osmosis and preservative technology, which is applied in the application field of forward osmosis technology in product concentration, can solve the problems of forward osmosis membrane pollution, affecting food flavor, and high reverse osmosis volume, so as to inhibit the growth of microorganisms and reduce the risk of membrane pollution. Effect

Active Publication Date: 2018-12-14
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, salt extracts such as sodium chloride have a high reverse osmosis amount, resulting in the accumulation of a large amount of salt in the product. For example, in food, it is easy to cause "salty" taste and affect the flavor of food. In chemical and pharmaceutical products, the purity of the product is reduced. , affecting product quality; although the sugar extraction solution does not produce a "salty" taste, it is rich in nutrients needed for microbial growth, and it is easy to breed microorganisms, causing forward osmosis membrane pollution, resulting in a decrease in production efficiency

Method used

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  • Application of positive infiltration technology using antiseptic as draw solution in product concentration
  • Application of positive infiltration technology using antiseptic as draw solution in product concentration

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Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the FO system is equipped with a membrane element of a forward osmosis membrane, a feed liquid circulation system located on one side of the forward osmosis membrane and a draw liquid circulation system located on the other side of the forward osmosis membrane, and the MD system includes a distillation The membrane element of the membrane, the cold side water circulation system on one side of the distillation membrane and the draw liquid circulation system on the other side of the distillation membrane.

[0043] The thin film composite forward osmosis membrane based on polysulfone substrate and the nanofiber hydrophobic membrane were gently installed into the membrane elements of the FO system and the membrane elements of the MD system respectively, and the potassium sorbate solution with a concentration of 2mol / L was used as the draw solution to open the FO system. Two gear pumps on both sides of the forward osmosis membrane of the system, ad...

Embodiment 2

[0046] The application method of the forward osmosis technology of the preservative as the drawing solution in product concentration is the same as in Example 1, the difference is that the lemon juice is concentrated with the sodium ascorbate solution of 2mol / L as the drawing solution, and the forward osmosis Water flux data for concentrated lemon juice such as Figure 5 shown.

Embodiment 3

[0048] The application method of the forward osmosis technology of the preservative as the drawing solution in product concentration is the same as in Example 1, the difference is that the lemon juice is concentrated with 2mol / L sodium nitrite solution as the drawing solution, and the forward osmosis concentrates the lemon juice The water flux data such as Image 6 shown.

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Abstract

The invention discloses an application of a positive infiltration technology using an antiseptic as a draw solution in product concentration, which belongs to the technical field of food, chemical orpharmaceutical concentration processing. The technical scheme includes the application of the positive infiltration technology using the antiseptic as the draw solution in product concentration, specifically, the preservative is used as the draw solution, and the product is concentrated or separated by employing a positive osmosis system or a positive osmosis integrated system. The antiseptic is applied to the processing of food, chemical and pharmaceutical product, and solves the problem that the existing draw solution affects the product quality and easily causes membrane pollution. The antiseptic can be used as the draw solution to effectively inhibit the growth of microorganisms and reduce the risk of membrane pollution during the positive osmosis without affecting the quality of the product. At the same time, a draw solution solute entering the product through reverse osmosis can be used as an anti-corrosion additive, which cannot be required for being removed.

Description

technical field [0001] The invention belongs to the technical field of concentration processing of food, chemical industry or medicine, and in particular relates to the application of a preservative in product concentration using a forward osmosis technology as a drawing solution. Background technique [0002] In recent years, with the development of membrane technology, more and more membrane separation processes have been used in the concentration and processing of food, chemical, and pharmaceutical products, such as reverse osmosis, nanofiltration and other membrane separation processes, but these pressure-driven processes exist during concentration. Severe membrane fouling results in high operation and maintenance costs and a low concentration factor. Compared with the traditional pressure-driven membrane process, forward osmosis can realize the concentration process without external operating pressure, and has the advantages of mild operating conditions, light membrane ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/00B01D61/36
CPCB01D61/002B01D61/364
Inventor 胡云霞安晓婵
Owner TIANJIN POLYTECHNIC UNIV
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