How to treat leather wastewater?

 With the improvement of people's living conditions, there are higher requirements for material life, and there is more demand for leather. It also drives the rapid development of leather processing industry in our country. While the development of the leather industry promotes employment and improves people, it also causes a lot of pollution to the environment, especially water pollution. For the sustainable and healthy development of enterprises, Water Treatment Chemicals is a top priority. How to treat the sewage? Now the best way is to use polymer polyacrylamide treatment. Can achieve very good results.

Let's talk about the application of polyacrylamide in the treatment of leather wastewater.

Main sources and components of leather wastewater:

Tannery industry production generally includes degreasing, liming hair removal, softening, tanning, dyeing processing, drying, finishing and other sections, the processing process needs to add a lot of chemicals, so that the wastewater contains grease, collagen, animal and plant fibers, dyes and other pollutants and toxic substances. Tannery wastewater is characterized by complex composition, deep color, more suspended matter, high oxygen consumption and large amount of water. The composition of leather wastewater is complex and treatment is also very difficult. Generally, the wastewater is first treated physically and chemically to remove the fur, oil residue, meat residue, and other components in the wastewater. Then appropriate chemical raw materials are added to complex heavy metals in the wastewater, such as chromium. Then anionic polyacrylamide and polyaluminum chloride , Polymerized Ferrous Sulfate,were added to flocculate and precipitate the sewage, concentrate it into sludge, and finally cationic polyacrylamide was added to dehydrate the sludge. In this way, the sewage treated by the steps greatly reduces the content of COD, total phosphorus, total nitrogen and heavy metals, and meets the standards of sewage discharge.