english
Dissolved air flotation (DAF) equipment is widely used in water treatment due to its high efficiency in separating suspended particles.
DAF operates on a straightforward principle. Air is dissolved in water under pressure and then released as tiny bubbles when the pressure drops. These bubbles attach to suspended particles, making them buoyant and facilitating their separation. This mechanism allows DAF to achieve remarkable precision.
In drinking water treatment, DAF equipment typically removes particles larger than 10 - 20 micrometers with an efficiency of up to 90 - 95%. This is crucial for eliminating algae, protozoa, and fine suspended solids, ensuring safe and clean drinking water.
When it comes to industrial wastewater treatment, the precision requirements vary. For example, in the paper and pulp industry, DAF can effectively remove fiber fragments and fillers down to 50 - 100 micrometers. In the food processing industry, it can separate fat globules and protein particles with a similar precision range.
However, several factors can influence the precision of DAF equipment. The quality of the incoming water, the proper adjustment of air - water ratios, and the design of the flotation tank all play significant roles. Incorrect operation or maintenance can lead to a decline in separation efficiency.
Compared to traditional sedimentation methods, DAF generally offers higher precision in a shorter treatment time. It can handle a higher hydraulic load and is more effective in removing low - density particles.
In conclusion, DAF flotation equipment can achieve a relatively high level of precision, meeting the diverse demands of different water treatment applications.
