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WebUnder Chinese National Code GB13456-92, "Discharge Standard of Water Pollutants for Iron and Steel Industry", the first class COD discharging limit of coking wastewater is lOOmg/L. Currently, biological degradation plus coagulation is used to treat coking wastewater in most coke plants. But such a hybrid process can only reduce COD to … WebNational Code GB13456-92. 0008. In the first aspect, the present invention provides a process for treating coking wastewater comprising the steps of passing the coking wastewater in Such an order through coagulation, particles removal, and ion-exchange resin. 0009 Preferably, the inventive process includes the steps chevy silverado wheels black

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