Treatment method of leather sewage

Abstract

The invention relates to a treatment method of leather sewage, which is implemented by adding a coagulant to the inside or outlet of a sewage pipeline through a chemical spray pipeline. The method is characterized in that the chemical spray pipeline is connected with at least 1 additional pipeline; complex elements for enhancing the coagulant efficiency are added into the coagulant through the additional pipeline; the complex elements and coagulant are mixed and enter sewage at the inside or outlet of the sewage pipeline; the coagulant is polyferric sulfate, polyaluminum chloride diallyldimethylammonium chloride, diallyldimethylammonium chloride or acrylic acid-amine copolymer; and the complex elements comprise calcium chloride, magnesium chloride, magnesium sulfate, zinc sulfate, zinc chloride, activated silicic acid, phosphoric acid, sulfuric acid, hydrochloric acid, diallyldimethylammonium chloride, diallyldimethylammonium chloride or acrylic acid-amine copolymer.

Description

technical field [0001] The invention relates to a treatment method for leather sewage, which belongs to the technical field of sewage treatment. Background technique [0002] In leather sewage treatment and water purification, coagulation is one of the very important units. It uses coagulants to change the state of particles in water, so that suspended components and colloidal components in water are separated, and under certain conditions, they can be formed Sedimentation or air flotation separates flocs, and then separates this part of flocs by sedimentation or air flotation. In the coagulation treatment, the coagulant used for different types of sewage is the key to the treatment, so many researchers are actively researching and developing new composite coagulants or flocculants, while the existing treatment of leather sewage The various coagulants mainly use iron salt or aluminum salt, and do not make a good distinction for leather sewage; at the same time, the compound...

AI Technical Summary

Problems solved by technology

In the coagulation treatment, the coagulant used for different types of sewage is the key to the treatment, so many researchers are actively researching and developing new composite coagulants or flocculants, while the existing treatment of leather sewage The various coagulants mainly use iron salt or aluminum salt, and do not make a good distinction for leather sewage; at the same time, the compounding process is also an important unit in sewage treatment, and there is a compounding time in the compounding process Some problems with the dosage, for example, in the process of treating leather sewage, there are problems such as the slow reaction between the coagulant and the leather sewage and the coagulant does not react with the suspended solids in the water, resulting in the metal elements in the coagulant remaining in the water , resulting in secondary pollution, at the same time the reaction of the coagulant is not complete, but also caused the waste of coagulant, and increased the cost of sewage treatment