A water treatment station is a facility that specialises in treating wastewater or sewage. It works by removing pollutants, suspended solids, and harmful substances from the wastewater so that the wastewater becomes clean and meets discharge requirements. In order to remove the foam generated during the treatment of wastewater, defoamers for water treatment stations are often used for defoaming.

The following factors may lead to the generation of large amounts of harmful foams when performing wastewater treatment:

1. Release of dissolved gases: when wastewater contains large amounts of dissolved gases (e.g. ammonia, hydrogen sulphide, etc.), the gases will be released from the water during the treatment process and form foam.

2. Temperature effects: high temperature environment, the foam generated during the wastewater treatment process is more likely to be stable and persistent.

3. Wastewater composition: wastewater contains organic matter, grease, protein and other substances are easy to form foam.

4. Surfactants present in the wastewater: some industrial wastewater may contain surfactants, which will reduce the surface tension of water, resulting in the generation of foam.

5. Stirring, aeration and other mechanical effects in the treatment process: Stirring, aeration and other mechanical effects in the wastewater treatment process will cause the air in the wastewater to be stirred up and form foam.

The function principle of defoamer for water treatment station is to eliminate or reduce the formation and stabilisation of foam by changing the physical properties of foam.

The defoamer for water treatment station will have the following effects when it comes into contact with the foam:

1. destroying the foam structure: the active substances in the defoamer can interact with the surfactant of the foam to destabilise the foam film, so that the foam loses its structure and disintegrates.

2. change surface tension: defoamer can reduce the surface tension between the foam and the surrounding liquid, thus reducing the formation and persistence of foam.

3. Dispersing gas bubbles: defoamer can penetrate into the gas bubbles in the foam and change the distribution and size of the bubbles so that they no longer aggregate into foam.

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