Polyacrylamide is used to treat tannery wastewater

Release time:

Jan 17,2024


Polyacrylamide treats leather wastewater. The tannery will produce a large amount of sewage during the leather production process. This sewage has high concentration, strong alkalinity, high oxygen consumption, and a lot of suspended particles in the water quality. A large number of various chemicals are added during the leather processing process, so the sewage is more complex and contains acids, alkali, dyes, sulfides, sugar, grease, protein, wool fiber, dander, suspended A variety of mixed organic and inorganic substances, such as Cr3+, S2-, and suspended particulate matter in the water, make water pollution more serious. Therefore, tannery factory wastewater treatment is more difficult, and it is also a relatively complex type of wastewater in the water purification industry.

The water purification agent commonly used by polyacrylamide in treating tannery wastewater is: anionic polyacrylamide, which has the advantages of good water purification effect, fast effect, high cost performance, etc. Anionic polyacrylamide can remove 80-80% of the sewage. 95% of suspended solids and about 90% of colloidal substances can also be sterilized, and the water purification effect is very obvious.

In the process of producing leather, because the raw materials of leather are different, the production processes of different leathers are also different, and the finished products produced are different. Therefore, the sewage situation is often very complicated, and the COD contained in the sewage is also different. During the process of making leather, there will be By adding active agents, aerobic activated carbon will be generated in the sewage during the sewage treatment process, so a lot of bubbles will be generated, and the foam and activated sludge will run away with the foam. Therefore, appropriate adjustments must be made according to the sewage conditions.

Polyacrylamide manufacturers recommend that before using polyacrylamide for water purification, a small sample test of sewage should be conducted to determine the appropriate water dissolved concentration and the dosage of PAM.