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Anionic polyacrylamide has certain usage methods when used. If used improperly, it may result in no flocculation and no effect. So, how should it be used? This article will share the correct usage and safety precautions of anionic polyacrylamide.
When using, prepare a 0.1% concentration aqueous solution, and it is advisable to use neutral water free of salt impurities.
During dissolution, the product should be dissolved in water with relatively low hardness. It is best to avoid using materials that can easily affect the water quality for the dissolution tank. Evenly sprinkle the anionic polyacrylamide product into the stirred water, with the stirring speed controlled at 100~300rpm. Stirring too vigorously can cause the molecular long chains to break and degrade. Proper heating (< 60°C) can accelerate dissolution.
Adjust the pH value of the treated liquid to make the anionic polyacrylamide product fully effective (select an appropriate pH value and dosage for this series of products through testing).
When adding an anionic polyacrylamide product solution, it is extremely important to effectively disperse it in water. The mixing with the treated liquid should be accelerated. Once flocs appear, reduce the stirring speed to facilitate the growth and rapid sedimentation of the flocs.
The optimal dosage of polyacrylamide varies according to its application.
The amount of anionic polyacrylamide used in coal washing can be set between thirty to one hundred ten kilograms; the wastewater from the chemical industry generally requires fifty to one hundred twenty kilograms. Wastewater from the dyeing industry and the paper industry is relatively difficult to treat and should increase the dosage, setting the amount between one hundred to three hundred kilograms is more reasonable. The electroplating wastewater industry and ordinary industrial water generally should not exceed fifty kilograms.
Operators should wear protective gloves, masks, and other protective equipment to avoid direct contact with anionic polyacrylamide. If contact with the product occurs, rinse immediately with clean water.
During use, avoid letting the product come into contact with eyes, mouth, and other areas. In case of accidental contact, rinse immediately with plenty of clean water and seek medical attention promptly.
Anionic polyacrylamide is a chemical agent, and leftover products and waste should be handled properly to avoid environmental pollution.
