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Micro bubble method, commonly used have aeration gas air flotation and dissolved air flotation.
And electrolysis method is not commonly used.
Electrolytic process is to sewage zhongtong into 5 ~ 10 v direct current, resulting in a tiny air bubbles, but because power consumption big plate electrode fouling extremely easily, so it is mainly used for small and medium-sized industrial wastewater treatment.
Aeration gas float
Aeration gas float is also called the dispersed air method, is set in the bottom of the floating pool microporous diffusion plate or diffusion tube, the compressed air from the surface or tube surface in the form of tiny air bubbles escape out of the water. Also has is installed at the bottom impeller, shaft perpendicular to the surface of the water, and below the compressed air to the impeller, borrow the high-speed rotating impeller stirring effect, will be cut into small bubbles big bubbles.
Dissolved air air flotation
The gas dissolved in water, the water can escape from the water pressure decreases. There are two ways: (1) gets the floating shelf space for vacuum, pressure in the flow of water into the pool after the release of the micro air bubble, called vacuum absorption method; (2) air dissolving in water saturated pressure, reduced pressure in the gas dissolved air water floating pool or release the micro air bubble, called pressurized dissolved air method. The latter is more commonly used. Pressurized dissolved air water may be the whole or any part of the treated water, can also be a gas float pool water backflow water, return water percentage of processed water reflux ratio, is one of the important factors affect the efficiency of air flotation, shall be determined by test. Have the equipment pressure pump pressurized dissolved air method, dissolved gas and air compressor, etc. Dissolving tank as the confined steel cylinder, the internal often set the guide plate or place packing. Dissolving tank water through the relief valve or release into the gas pool.