High-salt wastewater refers to wastewater containing organic matter and at least 3.5% (mass concentration) of total dissolved solids (TDS).
This kind of waste water has a wide range of sources. One type is chemical, pharmaceutical, petroleum, paper, dairy product processing, food canning and other industrial production processes, which will discharge a large amount of waste water. The water not only contains many high-concentration organic pollutants, but also Large amounts of calcium, sodium, chlorine, and sulfate ion.
The other is to make full use of water resources. Some coastal cities directly use seawater as water for industrial production or cooling water.
1-The traditional pretreatment process of dosing and coagulation-air flotation and precipitation
2-Fenton or electricity-Fenton catalytic oxidation pretreatment process
3-Double membrane pretreatment process
4-Ozone/catalysis/coagulation composite pretreatment process
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