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What are the causes of dirt accumulation in membrane structures in Yunnan?
Although Yunnan membrane structure It has a good self-cleaning function, but due to external factors, fouling will eventually accumulate. From a technical point of view, membrane structures do not necessarily need cleaning. For most membrane materials, cleaning cannot extend the service life, and if cleaning is improper, it will shorten its life. The reasons for the accumulation of fouling in Yunnan membrane structures are complex and mainly include the following aspects:
1. Influent water quality
The poorer the influent water quality, the more pollutants such as particles, bacteria, and organic matter it contains, the easier it is to accumulate on the membrane surface to form a fouling layer.
2. Insufficient pretreatment
If the pretreatment such as coagulation and filtration is insufficient, the potential pollutants in the influent will directly enter the membrane system, causing fouling accumulation.
3. Hydrochemical conditions
Hydrochemical conditions such as pH and conductivity will affect the chemical form of pollutants, and thus affect their deposition behavior on the membrane.
4. Operating conditions
Operating pressure, temperature, and velocity will affect the transport and accumulation of pollutants, and these conditions should be optimized to reduce fouling formation.
5. Membrane material properties
Different membranes have different mechanisms of pollutant adsorption and interaction, which will also affect fouling formation.
6. Bacterial growth
Some bacteria will adhere and grow on the membrane surface, secreting macromolecular colloid to adhere to pollutants.
7. Corrosion products
Compounds produced by membrane corrosion can also become part of the fouling.
8. Hydrochemical reactions
Hydrochemical reactions between substances in the influent will produce particles and other pollutants that aggregate together.
9. Fluid dynamics
Fluid shear stress and turbulence will cause pollutants to be transported and contact the membrane surface.
10. Biofouling
Some organisms will adhere to the membrane themselves and attract other fouling.
Taking effective measures based on these factors can effectively control the accumulation of membrane fouling.
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Copyright: Yunnan Tiehan Steel Structure Engineering Co., Ltd.
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