1. Advantages:
Dissolved air flotation does not release the head, it will not be clogged, and the investment in equipment construction is small.
Vortex air flotation is suitable for large amounts of sewage, simple operation, water quality color significantly improved occasions.
2. Disadvantages:
Dissolved air flotation surface loading is high, the hydraulic residence time is short;
Vortex air flotation wastewater with a high concentration of suspended solids, the decompression device is easy to clog, and management is complicated.
Dissolved air flotation is divided into advection air flotation, shallow air flotation, bubble diameter were 10-20 microns; 1-5 microns; vortex concave air flotation, bubble diameter of 40 microns or so; power consumption, due to vortex concave air flotation does not have a reflux high-pressure pumps, compressors, all the power to be a little smaller.
Expanded Information
Bubble generation methods:
Electrolysis: Electrolysis is the introduction of 5~10V DC in the sewage to generate tiny bubbles, but due to the high power consumption, it is mainly used for small and medium-sized industrial wastewater treatment.
Aeration air flotation method: aeration air flotation method, also known as dispersed air method, is set up in the bottom of the air flotation tank microporous diffusion plate or diffusion tube, compressed air escapes from the surface of the plate or plate. The surface of the tube is in the form of tiny bubbles. . There is also an impeller installed at the bottom of the pool with the shaft perpendicular to the water surface, and the large air bubbles are cut into small bubbles.
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