Use polyacrylamide to treat papermaking wastewater
Papermaking wastewater treatment refers to the treatment of sewage generated in the paper industry. The papermaking wastewater mainly comes from the two production processes of pulp and paper in the paper industry.
1.Pulping is the separation of fibers in plant material to make a slurry and bleach into a slurry;
2.Papermaking is the dilution, shaping, pressing and drying of the slurry, which is then made and processed into paper. Both pulp and paper are discharged from large amounts of wastewater. The wastewater produced by pulping is the most polluted. The wastewater discharged during the washing process is dark brown and is called black water. The concentration of contaminants in black water is very high. BOD is up to 5-40g / L and contains a lot of fiber, inorganic salts and pigments. The wastewater discharged from the bleaching process also contains a large amount of acid and alkali substances. The wastewater discharged from the paper machine, called white water, is filled with a large amount of fibers and fillers and rubber during the production process.
Description
Papermaking wastewater treatment refers to the treatment of sewage generated in the paper industry. The papermaking wastewater mainly comes from the two production processes of pulp and paper in the paper industry.
1.Pulping is the separation of fibers in plant material to make a slurry and bleach into a slurry;
2.Papermaking is the dilution, shaping, pressing and drying of the slurry, which is then made and processed into paper. Both pulp and paper are discharged from large amounts of wastewater. The wastewater produced by pulping is the most polluted. The wastewater discharged during the washing process is dark brown and is called black water. The concentration of contaminants in black water is very high. BOD is up to 5-40g / L and contains a lot of fiber, inorganic salts and pigments. The wastewater discharged from the bleaching process also contains a large amount of acid and alkali substances. The wastewater discharged from the paper machine, called white water, is filled with a large amount of fibers and fillers and rubber during the production process.
