Effects of amoxicillin on nitrogen transformation and bacterial community succession during aerobic composting.

•Amoxicillin (AMX) alters nitrogen transformation and release relative to control.•AMX raised NH4+-N content and lowered NO2−-N and NO3−-N content versus control.•AMX delays compost maturation and alters bacterial community makeup and succession.•AMX reduced Firmicutes, Bacteroidetes and improved Proteobacteria relative abundance.•AMX inhibits ammoniated and ammonia-oxidizing bacteria, boosts denitrifying bacteria.