The dissolved air floating ball does not release water head, will not be blocked, and the investment in equipment construction is less.
Vortex air flotation is suitable for situations with large sewage volume, simple operation and obvious improvement of water color.
2. Disadvantages:
Dissolved air flotation has high surface load and short hydraulic retention time;
When the concentration of suspended solids in cyclone air flotation wastewater is high, the decompression device is easy to block and the management is complicated.
Dissolved air flotation can be divided into advection air flotation and shallow air flotation, and the bubble diameters are 10-20 microns respectively. 1-5 microns; Vortex concave air flotation, the bubble diameter is about 40 microns; In terms of power consumption, all power consumption is smaller because there is no backflow high-pressure pump and air compressor in the vortex-concave air flotation.
Extended data
Bubble generation method:
Electrolytic method: electrolytic method is to introduce 5~ 10V DC into sewage to generate tiny bubbles, but it is mainly used for small and medium-sized industrial wastewater treatment because of its large power consumption.
Inflatable air flotation: inflatable air flotation, also known as air dispersion method, is to set a microporous diffuser or diffuser at the bottom of the air flotation tank to make compressed air escape from the board or board. The surface of the pipe is tiny bubbles. . The bottom of the pool is also equipped with an impeller, the shaft of which is perpendicular to the water surface, to cut large bubbles into small bubbles.
References:
Baidu encyclopedia-dissolved air flotation
References:
Baidu encyclopedia -Wowa air flotation