How to deal with leather wastewater?

With the improvement of people's living conditions, there is a higher demand for material life, and there is more demand for leather use. It also led to the rapid development of China's leather processing industry. While the development of the leather industry has driven employment and improved people, it has also caused great pollution to the environment, especially water pollution. In order for the company to continue to develop healthily, it is imperative to treat the sewage. How is sewage treated? The best way to do this now is to use a polymeric PAM. Can achieve very good results.

Let us talk about the application of PAM in leather wastewater treatment.

The main sources and components of leather wastewater:

The tanning industry generally includes degreasing, liming, depilation, softening, tanning, dyeing, drying, finishing, etc. Several chemicals need to be added during the processing, so that the wastewater contains oil, collagen, animal and plant fibers, A variety of pollutants and toxic substances such as dyes. Tanning wastewater is characterized by complex composition, deep color, high suspended solids, high oxygen consumption and large water volume. The composition of leather wastewater is complex and the handling is quite difficult. Generally, the wastewater is first physicochemically treated to remove fur, oil residue, meat residue, and the like from the wastewater. This is followed by the addition of a suitable chemical feedstock to complex heavy metals such as chromium in the wastewater. The sewage is flocculated and precipitated by adding anionic PAM and polyaluminium chloride, concentrated into sludge, and then dehydrated by adding cationic PAM. The sewage treated in this way greatly reduces the content of COD, total phosphorus, total nitrogen and heavy metals, and meets the standards for sewage discharge.