The choice of using anionic or cationic polyacrylamide (PAM) for air flotation mainly depends on the properties and requirements of the treated wastewater.

Cationic polyacrylamide (CPAM): mainly used for sludge dewatering and treatment of negatively charged wastewater. It exhibits cationic properties in both acidic and alkaline media, and is highly effective in flocculation and sedimentation of wastewater with negatively charged suspended particles. Suitable for wastewater from alcohol factories, beer factories, monosodium glutamate factories, sugar factories, meat factories, beverage factories, textile printing and dyeing factories, etc.

Anionic polyacrylamide (APAM): mainly used for flocculation, sedimentation, and clarification treatment of various industrial wastewater, such as steel plant wastewater, electroplating plant wastewater, metallurgical wastewater, coal washing wastewater, and sludge dewatering. It can also be used for clarifying and purifying drinking water.

Does the air flotation machine use anions or cations?

Dosing selection for air flotation machine: When using an air flotation machine to treat sludge, PAC and anionic PAM need to be added. And the treatment of sludge from air flotation by the screw stacking machine requires the addition of cationic PAM and PAC.

Wastewater properties: There are many organic compounds in kitchen wastewater, and the surface of SS is mainly negatively charged. The use of cationic polyacrylamide is more effective.

In summary, whether the air flotation machine uses anionic or cationic polyacrylamide depends on the specific properties of the wastewater and the treatment objectives. For negatively charged wastewater, using cationic polyacrylamide yields better results; For industrial wastewater that requires flocculation and sedimentation, anionic polyacrylamide may be more suitable. In practical operation, it may be necessary to determine the most suitable PAM type based on laboratory test results of wastewater.

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