Contact Us

Application of Membrane Separation Technology in Clarification of Vinegar

How Membrane Separation Technology Treats the Difficulty during the Clarification of Vinegar

Vinegar is a nutritious sour condiment, not only has a sour taste, but also has a certain umami, sweetness and aroma. The source of this color, fragrance, and taste is mainly produced by the biochemical effects of starch in the raw materials through enzymes secreted by microorganisms, such as the hydrolysis of starch into sugar, the fermentation of sugar into alcohol, and the oxidation of alcohol into acetic acid. However, during the entire brewing process, the starch, cellulose, protein, fat and other macromolecular substances in the raw materials were not completely decomposed, which caused the vinegar to become cloudy and precipitated, which seriously affected the quality of the product and the improvement of commodity grades.

Therefore, vinegar must be clarified before leaving the factory. At present, many vinegar brewing companies also use the traditional natural sedimentation method to clarify vinegar. This method mainly relies on mutual polymerization and precipitation of colloidal substances in vinegar to achieve clarification. However, the processing time of this method is generally longer, and its effect is not satisfactory, and it is often easy to cause the inner wall of the vinegar bottle during the shelf life. At the liquid level and at the bottom of the bottle, dark brown circles and sediments appeared; some loose flocs gathered at the bottom of the bottle, and the flocs disappeared after a little shaking. This phenomenon indicates that the vinegar has precipitated during the storage period. It has affected the organoleptic indicators of the product, and seriously affected the quality of the product and the consumer psychology of the public, and it has not adapted to the needs of the rapid expansion of the vinegar market.

Selection of Membrane Separation Technology in Clarification of Vinegar

Using ceramic membrane filtration system as a clarification process for vinegar can solve the existing dilemma. The principle of ceramic membrane filtration is to drive vinegar through the surface of the membrane under pressure. The organic acid and the substances that make up the vinegar aroma and ester aroma pass through the filtration membrane to become permeate and flow out, while the vinegar has micron and sub-micron suspended particles and other macromolecular proteins and bacterial substances are blocked by the filter membrane. The inorganic ceramic membrane uses micropores with appropriate pore sizes to filter out these impurities without affecting the flavor of vinegar. At the same time, the ceramic membrane itself has the characteristics of acid and alkali resistance, easy to clean and regenerate. It is used in the filtration and separation of vinegar, showing more obvious advantages than organic membranes and other traditional filters.


Because vinegar contains protein, tanning and colloidal substances, the membrane is easily contaminated and blocked after a period of filtration, resulting in a decrease in membrane flux. When the membrane is seriously polluted, chemical cleaning can be used to remove the pollutants, so that the membrane can restore the membrane flux for repeated use, and reduce the cost of membrane materials. Generally, alkaline chemical reagents are used as cleaning agents to remove organic matter such as protein and grease. Jiuwu Hi-Tech has used ceramic membranes to clarify vinegar in continuous operation for many years, and 0.1% sodium hydroxide solution is used to clean contaminated membranes. The cleaning effect is good and the membrane regeneration effect is stable.


Technical Advantages of Vinegar Membrane Filtration

1. Impurity separation, high light transmittance, no muddy or precipitation after long-term storage.

2. It saves traditional filtration links such as diatomite, simplifies the process and reduces production costs.

3. Normal temperature filtration replaces heat sterilization to ensure product quality.

4. It adopts cross-flow filtration process design, which is not easy to be blocked, and can realize automatic control, which is beneficial to management and maintenance.

5. Membrane elements have long service life, low regeneration cost, stable process and simple operation.


The ceramic membrane separation system can directly process the raw liquid of vinegar production, replacing the traditional multi-step filtration process. It has high filtration accuracy, high filtrate quality and no back mixing. After filtration, it does not need high temperature sterilization, retains the natural flavor of the product, and the equipment can be closed for operation. Membrane components and pipe valves use sanitary stainless steel to meet the requirements of clean production. The equipment is resistant to high temperatures and has a long service life. The equipment has strong chemical stability, acid and alkali resistance, no leaching, and meets food safety requirements.

ceramic membrane separation equipment

Related News

  • IE expo China 2020

    IE expo China 2020

    August 13, 2020JIUWU HI-TECH Team will participate in Shanghai IE expo China 2020 on 13th Aug.- 15th Aug.Booth number : E3 Hall E22 D22 Welcome the general new and old customers to present our booth to discuss the C...view
  • Application of Membrane Technology in Dairy Industry

    Application of Membrane Technology in Dairy Industry

    August 26, 2020Membrane separation technology has the advantages of low environmental pollution, low energy consumption, no need to use additives, avoiding thermal damage to products, and concentrating or separating...view
  • Application of Spiral Membrane in Water Treatment

    Application of Spiral Membrane in Water Treatment

    January 12, 20211. Introduction of spiral membraneIn recent years, with rapid economic growth, industrialization, and urbanization, the subsequent water pollution and its prevention have attracted widespread attentio...view
  • Harmonious Development of Man and Nature- ZLD technology from JIUWU HI-TECH

    Harmonious Development of Man and Nature- ZLD technology from JIUWU HI-TECH

    June 29, 202001 Present situation of zero liquid discharge of industrial wastewaterThe general idea of zero liquid discharge(ZLD) technology is combined process of pretreatment , membrane concentration decrement a...view

Contact Us

  • +86-25-58849045
  • +86-25-58749295
  • jiuwu@jiuwu.com
  • No. 9 Yuansi Road, Pukou, Nanjing, Jiangsu, China 211808
chat