1. Before starting the machine, first add lime powder or alkali flakes into the sewage tank, and then turn on the sewage pump in the air flotation machine, so that the lime powder or alkali flakes and sewage can be fully mixed evenly. At this time, it is necessary to use acid-base test paper to detect the pH value of the sewage , and it is better to reach 8-9 . 2. After stirring the two medicines, continue to add polyaluminum chloride to the sewage and stir ; and polyacrylamide and stir. It should be noted that the dosage of various drugs in the sewage tank is changed at any time according to the cleanliness and experience of the sewage, and the basic principle is that the effluent is clear and transparent. 3. Then turn on the main switch of the air flotation motor control cabinet, and check the normality of each electrical component ; the lubrication of each stirring motor and water pump, etc., add appropriate lubricating oil according to the actual situation. After all these preparations are completed, the air flotation machine can be turned on. 4. The opening sequence starts from the high pressure pump, followed by the water inlet valve and the water outlet valve. After the high pressure pump runs normally, slowly close the water outlet valve; and observe the pressure gauge at any time. After the air flotation machine runs for many times, there is no need to adjust the inlet and outlet valves, just turn on the high-pressure pump.

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