A project example of treatment of coking wastewater by two stage AO-catalytic ozonation-post denitrification-BAF process
Coking wastewater has complex pollutants composition,which contains a large proportion of dif-ficult biodegradable pollutants.Two stage AO-catalytic ozonation-post denitrification-BAF process was adopted in the design of a project treating coking wastewater,the process flow,characteristics,design parameters and op-eration effect of the said project were introduced.The operation results showed that,when the mass concentra-tions of COD and ammonia nitrogen in the influent water of the system were 5 746-7 283 and 91.4-130.1 mg/L respectively,after the treatment,the mass concentrations of COD and ammonia nitrogen were 40-55 and lower than 2 mg/L respectively.The effluent water quality was stable and reached the design goal,which was conducive the the normal operation of the subsequent membrane reuse system.
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