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Nitrogen and Non-steroidal anti inflammatory drugs(NSAIDs)have been frequently detected in the effluence of the sewage treatment system.It is a big challenge for the efficient removal of nitrogen and NSAIDs from the treatment system simultaneously.In this study,anoxic biofilter(ABF)packing with volcano rock were conducted to achieved high co-removal efficiencies for nitrogen and the typical NSAIDs,acetaminophen(APAP).After 3 months operation,the ABF achieved 71±3%NH4+-N and 56±2%TN removal efficiencies under 3 day HRT and 116 mg NL-1d-1 nitrogen loading rate.