Processing method of heavy metal pickling sewage or acid sewage

Abstract

The invention discloses a disposing method of heavy metal acid-refined effluent or acid effluent, which is characterized by the following: adding coagulant in the effluent pipe or outlet through drug spraying pipe; connecting at least one auxiliary pipe on the drug spraying pipe; adding composite element in the coagulant through auxiliary pipe to improve coagulant efficiency; adopting magnesium hydroxide, calcium hydroxide, potassium hydroxide, sodium hydroxide or aluminium hydroxide as coagulant; making composite element from diatomaceous earth, alta-mud, zeolite, cationic polyacrylamide, diallyl dimethyl ammonium chloride or acrylamide copolymer.

Description

technical field [0001] The invention relates to a treatment method for heavy metal pickling sewage or acid sewage, and belongs to the technical field of sewage treatment. Background technique [0002] In heavy metal pickling sewage or acid 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. Under certain conditions, flocs that can be separated by precipitation or air flotation are formed, and then this part of flocs is separated by precipitation or air flotation. In 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 heavy metal acids Various coagulants for washing sewage or acid sewage mainly use iron salts or aluminum s...

AI Technical Summary

Problems solved by technology

In 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 heavy metal acids Various coagulants for washing sewage or acid sewage mainly use iron salts or aluminum salts, and do not make a good distinction for heavy metal pickling sewage or acid sewage; at the same time, the compounding process is also an important unit in sewage treatment. There are some problems with the compounding time and dosage in the compounding process. For example, in the process of treating heavy metal pickling sewage or acidic sewage, there are slow reactions between the coagulant and heavy metal pickling sewage or acidic sewage and the coagulant is not mixed with the acidic sewage. Problems such as the reaction of suspended solids in the water caused the metal elements in the coagulant to remain in the water, resulting in secondary pollution. At the same time, the incomplete reaction of the coagulant also caused waste of the coagulant and increased sewage treatment. cost of

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