How to adjust the flotation effect of the flotation tank?
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How to adjust the flotation effect of the flotation tank for oily wastewater? Thank you for your help
You can consider adding a little surfactant to increase the surface tension of the wastewater and make it easier to separate oil and water. Moreover, the amount of surfactant used is very small, which has little impact on COD and does not impose any burden on biochemical treatment.~
I don’t know what kind of air flotation you have! Generally, you need to control the dosage of medicine.
Do you add flocculants to the water? Generally, PAC (polyaluminum chloride) and PAM (polyacrylamide) are injected into the air flotation inlet water to help separate oil and water. The dosage of PAC is 20g/ton of water, and the dosage of PAM is 1/40-1/20. In addition, pay attention to adjusting the air supply volume of the air flotation compressor. Do it frequently and observe frequently.
It seems that surfactants cannot be added to oily wastewater? Really?
I don’t know what kind of air flotation it is, but the pressurized dissolved air flotation system is a method that combines the floc formed in the reaction tank with tiny bubbles to float them up due to buoyancy, thereby achieving the purpose of removing CODcr, BOD5, SS (suspended solids in water), etc. 1. Start the reflux water pump and pump the reflux water into the container tank. The water level in the tank must be more than half the volume of the container tank. Then add compressed air and mix the air and water in the dissolved air tank for about 10 minutes. When the dissolved air water comes out reaches milky white, it is qualified. The pressure gauge is controlled at about 0.3-0.4MPa. 2. When the scum is 50-100mm, press the button scraper to scrape the scum into the slag collecting tank. 3. When the amount of slag in the slag collecting tank reaches a certain amount, raise the overflow gate of the air flotation tank to raise the water level and flush the slag collecting tank. After flushing, lower the valve to the normal operating water level.
Can I ask how to deal with the sludge produced by the air flotation machine?