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Products

coking wastewater

coking wastewater

coking wastewater

Characteristics of Coking Wastewater​ The pollutants contained in coking wastewater include phenolic compounds, polycyclic aromatic compounds, and heterocyclic compounds containing nitrogen, oxygen, and sulfur. It is a typical industrial wastewater containing refractory organic compounds.​ The easily degradable organic matter in coking wastewater mainly includes phenolic compounds and benzene compounds, while pyrrole, naphthalene, furan, and imidazole belong to degradable organic matter. The refractory organic matter mainly includes pyridine, carbazole, biphenyl, and terphenyl. The quality of coking wastewater varies greatly depending on the technological processes and production operation methods of different plants.​ The pretreatment methods before biological treatment are usually physical and chemical methods, such as air flotation, stripping, coagulation sedimentation, and breakpoint chlorination. The main purpose is to make the influent of the secondary biochemical treatment process meet the range of biodegradable treatment.

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