CAF is an excellent machine sewage treatment technology, reasonable design, easy to operate, the economy, which produces bubbles of air, to remove suspended solids, grease, gum and other contaminants from wastewater. Cavitation aerators will "microbubbles" injected directly into the water without the need to advance the dissolved air, then by aeration impeller to "micro-bubbles" uniformly distributed in the water, so the entire operation will not be jammed. CAF mainly by the cabinet, aerators, scraper system, etc., does not need pressure dissolved gas, air compressors and circulation. First of untreated sewage into the aeration zone, mixed with microbubbles, micro bubbles in the process of rising to the surface of the water in the suspended solids, scraper run along the surface of the suspension was blown tilt metal plate, and then push it into the sludge discharge ducts, through the sludge discharge ducts inflows sludge collectors, scraper power only 0.5KW. After the wastewater treatment prior to discharge will go through the overflow tank beneath the inclined plate, used to control the water level in the overflow tank flotation tank, ensure the liquid does not flow into the sludge tank discharge piping and open pharynx flow conduit from the aeration section extending along the bottom of the flotation tank. While generating microbubbles, Cavitation aeration opportunity with a reflux pipe bottom to form a negative pressure zone, the negative pressure causes water to the reflux from the bottom of the pond aeration zone, and then return to the flotation section. Under this procedure ensures that no inflow of circumstances, air is still ongoing.