Industrial sewage treatment is an important environmental protection issue, which is of great significance for protecting the environment and maintaining human health. The following will introduce the basic methods and treatment processes of industrial wastewater treatment.
The basic components of industrial wastewater.
The main components of industrial wastewater include organic matter, inorganic matter, chemical substances, microorganisms, etc. Among them, organic matter is the most important component of industrial wastewater, which usually includes petroleum, chemicals, pesticides, biomass, pulp, etc.
Methods for the treatment of industrial wastewater.
There are three main treatment methods for industrial wastewater: physical, chemical and biological treatment.
Physical processing methods.
Physical treatment methods mainly include precipitation, filtration, evaporation, centrifugation, etc. Sedimentation is a commonly used method to separate the solid matter from the sewage through sedimentation.
Chemical treatment methods.
Chemical treatment methods mainly include oxidation, reduction, neutralization, precipitation, etc. Among them, sedimentation is a commonly used method, which converts the dissolved substances in the sewage into solid substances by adding chemicals, so as to achieve the purpose of purification.
Biological treatment methods.
There are two main biological treatment methods: aerobic bacteria and anaerobic bacteria. Aerobic bacteria are microorganisms that can decompose organic matter in the presence of oxygen, while anaerobic bacteria are microorganisms that can decompose organic matter in the absence of oxygen. Biological treatment methods can convert organic matter in sewage into inorganic matter, so as to achieve the purpose of purification.
The process of industrial wastewater treatment.
The process of industrial wastewater treatment includes three stages: pre-treatment, main treatment and post-treatment.
Pre-treatment is mainly to carry out preliminary treatment of sewage to remove large particulate matter in sewage and reduce the pressure of subsequent treatment process. It usually includes treatment methods such as screening, grids, sand pools, etc.
Main treatment is the core stage of industrial wastewater treatment, which mainly uses physical, chemical and biological treatment methods to purify wastewater. It usually includes precipitation, oxidation, neutralization, aerobic treatment, anaerobic treatment and other treatment methods.
Post-treatment is mainly to further purify the treated sewage to meet the discharge requirements. It usually includes treatment methods such as disinfection, filtration, etc.
The basic methods of industrial wastewater treatment mainly include physical, chemical and biological treatment, and the treatment process includes three stages: pre-treatment, main treatment and post-treatment. With the continuous improvement of environmental protection awareness, the requirements for industrial sewage treatment are getting higher and higher, and the industrial sewage treatment technology will be continuously updated and improved in the future to better protect the environment and human health.