What is high salinity wastewater?

With the rapid development of national economy, the problem of environmental pollution caused by improper discharge of high salinity wastewater is becoming more and more serious. What are the treatment methods of high salinity wastewater that can properly solve the problem of high salt wastewater treatment has become one of the key issues of environmental protection.

With the development of high concentration industrial wastewater, more and more complex methods are needed to treat wastewater. So what is high salinity wastewater? Let's talk about it.

High salinity wastewater refers to the wastewater containing organic matter and at least 3.5% (mass concentration) of total dissolved solids (TDS). The source of high salinity wastewater is relatively wide, the production way is wide, covering many industries, and the treatment is difficult.

The first source of high salinity wastewater is that a large amount of wastewater will be discharged from various industrial production processes, such as chemical industry, pharmaceutical industry, petroleum industry, papermaking, dairy processing and food canning. The water not only contains a lot of high concentration organic pollutants, but also has a lot of ions such as calcium, sodium, chlorine and sulfate. Second, in order to make full use of water resources, many coastal cities directly use sea water as industrial production water or cooling water. In some places, seawater is used for fire fighting, toilet flushing and roads. Although this part of sewage does not contain a lot of toxic substances, it is also difficult to treat due to its large amount of water and high salt content. So what can be done to solve these high salinity wastewater? It is understood that the common treatment methods of high salinity wastewater include electrolysis, ion exchange, biochemical treatment, chemical oxidation, membrane separation, evaporation, concentration, extraction, adsorption, incineration, catalytic oxidation, etc.