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Understanding the Characteristics, Applications, and Cleaning Requirements of Microfiltration Membra

There are many types of membranes used in water treatment, and microfiltration membranes are also widely used. These membranes can intercept particles ranging from 0.1 to 1 microns. Microfiltration membranes can allow large molecules and dissolved solids to pass through smoothly, but can retain suspended solids and a large number of bacteria. Generally, the operating pressure is between 0.3 and 7 bar. Microfiltration membrane filtration can be said to be one of the earliest developed and applied membrane technologies in the world, mainly using natural and artificially synthesized membrane materials. At the same time, the separation mechanism of microfiltration membranes is mainly screening and trapping.


Understanding Microfiltration membranes


Microfiltration membranes are divided into inorganic membranes and organic polymer membranes according to their film-forming materials. Inorganic membranes are further divided into ceramic membranes and metal membranes, and organic polymer membranes are divided into natural polymer membranes and synthetic polymer membranes. According to the form of the membrane, it can be divided into flat membrane, tubular membrane, rolled membrane, and hollow fiber membrane. According to the principle of membrane preparation, the preparation methods of polymer membranes include leaching method (dry-wet method), stretching hole method, phase transformation method, thermally induced method, immersion coating method, irradiation method, surface chemical modification method, nuclear track method, dynamic formation method, etc. As a leading ceramic membrane supplier in China, Jiawu High-Tech has always focused on the research and development of advanced ceramic membrane technology.


Characteristics and Applications of Microfiltration membranes


  • The separation efficiency can reach a good level, but it also depends on the pore size and pore size distribution of the membrane. For all microfiltration membranes, the pore size must be the same and the accuracy must be high, which has good reliability.

  • The surface porosity of the microfiltration membrane is high, generally reaching 70%, which is up to forty times higher than the filtering capacity of ordinary membranes.

  • The thickness of the microfiltration membrane is thin, so it will not cause too much loss.

  • A large number of high-polymer microfiltration membranes are connected in series, which will not cause secondary pollution. Microfiltration membranes are applied in the filtration and sterilization of the pharmaceutical industry, food industry, paint industry, and biotechnology industry.


Requirements for cleaning Microfiltration membranes


  • Place all the membranes flat in the cleaning device, soak them in water at about 70℃, and wet them completely. After more than four hours, filter out all the water and soak them in an appropriate amount of warm distilled water for cleaning.

  • The microfiltration membrane should be completely installed in the cleaning device to avoid being affected by other liquids and reach a certain filtration state.

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