Coking wastewater is a kind of intractab wastewater which are from the process of making coke, purifying coal gas and recovering coke products.

• 焦化废水是煤制焦碳、煤气净化及焦化产品回收过程中产生的废水，受原煤性质、炼焦工艺、焦化产品回收等诸多因素的影响，其成分复杂多变，属于难处理的工业废水。