dissolved air flotation (DAF) is an efficient solid-liquid separation technology, particularly suitable for removing suspended solids (SS), oils, and other light substances from water. The working principle of an air flotation machine is to dissolve air in water and release it under specific conditions to form tiny bubbles. These bubbles combine with suspended matter in water, and due to the presence of bubbles, the density of suspended matter is lower than that of water, causing it to float to the surface and form floating slag, which is ultimately removed by a scraper.

The SS removal rate of an air flotation machine is influenced by various factors, including but not limited to:

Bubble size: The smaller and more numerous the bubbles, the more opportunities they have to come into contact with suspended matter, and the higher the removal efficiency.

The use of coagulants: Adding appropriate coagulants can promote the aggregation of suspended substances, improve the adhesion efficiency between bubbles and suspended substances, and thereby increase the SS removal rate.

Air flotation time: Sufficient air flotation time is conducive to the full contact between bubbles and suspended substances, improving removal efficiency.

Water temperature: Appropriate water temperature can help improve the effectiveness of coagulants, thereby enhancing removal efficiency.

PH value: A suitable pH value helps coagulants to achieve optimal performance, thereby improving removal efficiency.

According to different sources of information, the SS removal rate of air flotation machines can reach a high level:

Without the addition of coagulants, the SS removal rate can reach over 70%;

After adding coagulants, the removal rate of SS can be significantly improved, reaching a maximum of over 90% -95%.

Especially the CQJ type ultra efficient shallow ion air flotation machine, its SS removal rate can even reach over 95%, demonstrating extremely high removal efficiency.

conclusion

In summary, air flotation machine is a very effective technology for removing suspended solids in water, especially after adding appropriate coagulants, which can achieve a very high SS removal rate. However, the removal efficiency in practical applications is also affected by various factors, so it is necessary to comprehensively consider various conditions in the design and operation process to ensure the best treatment effect.

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