Treatment of secondary effluent from a petrochemical wastewater treatment plant by ozonation‐biological aerated filter

Abstract BACKGROUD Secondary effluent collected from a petrochemical wastewater treatment plant was treated by ozone–biological aerated filter ( O 3 ‐BAF ) to investigate and evaluate the performance, organics and genotoxicity removal characteristics of this combined advanced treatment process. RESULTS The average dissolved organic carbon ( DOC ) of the secondary effluent was approximately 23 mg L −1 . When the ozone dosage was 10 mg L …