Final purification of biochemically treated coke-plant wastewater

Abstract

The final purification of coke-plant wastewater after biochemical treatment by nitrification–denitrification is considered. All the methods that reduce the chemical oxygen demand, color, and suspended substances content are complex and expensive. Only two methods reduce the salt content (dry residue) to the standard levels for water added to circulatory cooling systems: thermal distillation and membrane purification. Of these, thermal distillation is best in practice.