ultrafiltration membrane It is a kind of polymer material semi permeable membrane used to extract certain size polymer material colloidal solution or floating particles from aqueous solution in the whole process of ultrafiltration membrane. Driven by the working pressure, the membrane diameter is 1~100nm, which belongs to the type of asymmetric membrane. The density of the pore phase pair is about 10/cm, and the actual operating pressure difference is 100~1005kPa. It is suitable for resin adsorption of colloidal solution particles and biological macromolecules, and can separate aqueous solutions with concentration less than 10%. The working capacity of ultrafiltration membrane for water permeability increases with the rise of temperature, and the viscosity of general solution decreases with the rise of temperature, thus reducing the friction resistance of fluidity, and correspondingly improving the water permeability speed. The specific temperature of the liquid provided on the spot during the work shall be taken into account in the design of building engineering.
Ultrafiltration membrane manufacturer In the whole process of sewage treatment and other industrial production purification treatment, concentration and separation, ultrafiltration membrane method can be used as the preparatory treatment of the whole process of processing technology, and can also be used as the deep solution of the whole process of processing technology. Among the widely used water treatment methods, it is often used as a deep purification treatment method. According to the characteristics of hollow chemical fiber ultrafiltration membrane, there are certain provisions for the preparation of water supply and drainage. As the suspended solids, colloidal solutions, microorganisms and other residues in water will adhere to the membrane surface, the membrane will suffer environmental pollution. Because of the large water diffusion coefficient of ultrafiltration membrane, the concentration of impurities intercepted on the membrane surface increases rapidly, resulting in channeling effect. More seriously, some small particles will enter the membrane hole and block the waterway. In addition, microorganisms and metabolites in water will also adhere to the membrane surface. Such factors will reduce the permeability of ultrafiltration membrane and change the separation characteristics. In addition, there are also certain regulations on the temperature, pH value and concentration value of ultrafiltration membrane power supply. Therefore, it is necessary to carry out appropriate preparatory treatment and adjustment for the power supply of ultrafiltration membrane to meet the power supply regulations, thus increasing the service life of ultrafiltration membrane and reducing the cost of sewage treatment.
1、 Destruction of microorganisms (bacteria, algae):
The ultrafiltration membrane manufacturer pointed out that when there are microorganisms in the water, some intercepted microorganisms are likely to adhere to the pre solution system software after the pre solution system software, such as the material surface of the multi material filtration device. When it adheres to the surface of ultrafiltration membrane, it will grow, develop and breed, which is likely to block the microplate and even the inner wall of hollow chemical fiber. The harmful effects of microorganisms on hollow chemical fiber ultrafiltration membrane are very serious. High attention must be paid to removing bacteria, algae and other microorganisms from raw water. NaClO, O3 and other reducing agents are generally added in the water treatment technology, and the concentration value is generally 1-5mg/l. In addition, ultraviolet sterilization can also be applied. Sterilization of hollow chemical fiber ultrafiltration membrane components can be carried out in the laboratory. Hydrogen peroxide (H2O2) or potassium sulfate solution circulation system can be used to solve the problem for 30~60min. The elimination of microorganisms solution can only eliminate microorganisms, but it can not remove microorganisms from water, but only avoid the breeding of microorganisms.
2、 Reduce water seepage turbidity:
The ultrafiltration membrane manufacturer said that when there are suspended solids, colloidal solutions, microorganisms and other residues in the water, it will cause a certain level of turbidity in the water, which will block the passage of light sources. Such electronic optical effects are related to the size, size and appearance of the residue. Considering that the turbidity of water is generally indicated by the corrosivity, and the turbidity caused by mg/lSiO2 is required to be 1 degree. The higher the myopic degree, the higher the impurity content. There are different regulations on power supply turbidity in different industries. For example, for general drinking water, the turbidity cannot exceed 5 degrees. Because the accurate measurement of turbidity is to accurately measure the visibility, hue and opacity of the light source reflected by the fine particles in the water through the source water. The size, total number and appearance of particles are harmful to the measurement. The correlation between turbidity and suspended solids is arbitrary. For less than μ M particles, turbidity can not be reflected.
In the membrane treatment mode, because of the accuracy of its external economic structure and its interception of molecular structure and even positive ion particles, it is significantly inaccurate to use turbidity to reflect the water body.
