Leather sewage processing method

Abstract

The invention discloses a leather sewage processing method, which is characterized by the following steps: adding a coagulant in an effluent pipe or outlet through a drug spraying pipe; connecting at least one auxiliary pipe on the drug spraying pipe; adding the compound elements (or the compound substances) in the coagulant to improve the efficiency of the coagulant; and blending the compound elements and the coagulant into the effluent in the effluent pipe; wherein, the coagulant is polyferric sulfate, polyaluminum chloride diallyldimethylammonium chloride, and diallyldimethylammonium chloride or acrylic acid-amine copolymer; and the compound elements comprise calcium chloride, magnesium chloride, magnesium sulfate, zinc sulfate, zinc chloride, phosphoric acid, sulfuric acid, hydrochloric acid, activated silicic acid, diallyldimethylammonium chloride, and a 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, and incomplete reaction of the coagulant, resulting in waste of coagulant and increased cost of sewage treatment