The leather manufacturing industry is one of the oldest industries in the world, and pollutants or by-products are formed in leather manufacturing. If these dye wastewater are discharged without treatment, it will have a great impact on the environment. So, what methods should be used for leather dye wastewater?

Leather dye wastewater usually contains various pollutants and toxic substances such as oil, collagen, animal and plant fibers, dyes, etc.

The wastewater from leather dyes has complex components, deep color, high suspended solids, high oxygen consumption, and large water volume, so there are still certain difficulties in treatment.

Generally divided into two steps:

Physical treatment: The wastewater will first undergo physical and chemical treatment to remove components such as fur, oil residue, and meat residue from the dye wastewater;

Chemical treatment: adding chemical raw materials to wastewater, conducting chemical reactions, adding anionic polyacrylamide, and polymerization chlorination

Aluminum is used to coagulate and precipitate wastewater, concentrate it into sludge, and then add cationic polyacrylamide to dehydrate the sludge.

This step greatly reduces the content of total nitrogen and heavy metals in the wastewater. The advantage of its equipment in the treatment of leather dye wastewater is that:

1. The entire process of the main equipment is integrated in the workshop, so it is not affected by weather, which greatly shortens the on-site civil construction period.

2. It can be used with a voltage of 220V or 380V, with flexible selection and simple implementation.

3. The system is easy to operate, manage, and maintain.

4. The dye wastewater treatment equipment adopts automatic liquid level sensing control, which can avoid electricity waste.

5. Due to the complex composition of dye wastewater, carbon steel anti-corrosion is used in the installation, which has the advantages of high compressive strength and acid alkali corrosion resistance.