Application practice of ozone catalytic oxidation technology in upgrading and modification of coking wastewater treatment process
To improve the quality of effluent water in the coking wastewater treatment,in Shanxi Antai Group Co.,Ltd.,the original A2O wastewater treatment process was upgraded with the ozone catalytic oxidation technology.The mechanism of ozone catalytic oxidation treatment of coking wastewater was analyzed,the process of upgrading and transformation was introduced,the effects of ozone dosage,oxidation time and pH level on the degradation of chemical oxygen demand(COD)in the wastewater were investigated through process adjustment.The optimal process conditions were established as follows:oxidation time of 45 minutes,ozone dosage ranging from 70 mg/L to 90 mg/L,and pH level maintained between 7 and 9.Under these optimal conditions,the COD level in the treated coking wastewater effluent consistently remained below 80 mg/L over an extended period,achieving a COD degradation rate of approximately 40% .
coking wastewaterupgrading and modificationozone catalytic oxidationoptimum process conditionCOD degradation rate
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