To determine the appropriate amount of PAM for treating wastewater with an air flotation machine, it is usually necessary to follow the following steps and precautions:

Laboratory trial: Firstly, determine the optimal dosage of PAM through laboratory trials. This involves preparing PAM solutions of different concentrations and observing their effects on the flocculation efficiency of wastewater. The optimal amount of PAM can be determined by gradually increasing the dosage and observing the flocculation of suspended particles in the wastewater.

Preparation method: PAM is usually used in a 0.1% -0.2% aqueous solution. When preparing, PAM must be evenly and dispersed in constantly stirring water to ensure that it is dispersed as individual particles when entering the water, avoiding the formation of clumps, as once large particle clusters are formed, it is difficult to continue dissolving.

How to determine the appropriate amount of PAM when using an air flotation machine to treat wastewater?

Addition amount: After adding PAM to sewage or sludge, it should be effectively mixed, and the mixing time is generally 10-30 seconds, not exceeding 2 minutes. The specific usage of PAM is closely related to the concentration, properties, and treatment equipment of colloids and suspended solids in sewage or sludge. The dosage for treating sewage is generally within 3-10PPM, which means adding 3-10g per ton of water.

Calculation formula: The dosage of PAM can be calculated using the following formula: C=Q × VC=Q × V, where CC represents the dosage of PAM (in milliliters or grams), QQ represents the mass concentration of suspended particles in the water (in milligrams per liter or grams per liter), and VV represents the volume of the water to be treated (in liters).

On site adjustment: The actual dosage may vary depending on the water quality and needs to be adjusted on-site. The dosage of PAC and PAM can be adjusted by observing the particle size of alum at the end of the air flotation and whether the effluent is turbid, combined with the influent SS and conducting coagulation experiments.

Attention: PAM solution is prone to hydrolysis and should be used up on the same day. When preparing the medicine, strictly follow the operating procedures and instructions, and do not mix impurities into the medicine to avoid blocking the dosing pump, flow meter, etc.

Dynamic adjustment: Based on the amount of sewage generated by the hospital at different time periods, the dosage of drugs is dynamically adjusted to ensure that sewage is discharged in compliance with standards and to control daily operating costs.

By following the above steps and precautions, the appropriate amount of PAM for treating wastewater with an air flotation machine can be determined.

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