Method for removing antibiotics in dairy farm wastewater

The invention discloses a method for removing antibiotics in dairy farm wastewater. On the basis of a reactor, an anoxic-aerobic biological treatment process is adopted to remove antibiotics from wastewater without suspended solids, the operation process of the reactor comprises the following steps: wastewater entering, idling, stirring in an anoxic tank, aeration in an aerobic tank, precipitationand water discharging, the reactor is divided into four grids, namely an anoxic tank, an aerobic tank I, an aerobic tank II and an aerobic tank III in sequence, the reactor is also provided with a mixed liquid reflux device for refluxing the mixed liquid in the aerobic tank III into the anoxic tank, a water decanter is arranged in the aerobic tank III, and the wastewater is discharged from the aerobic tank III through the water decanter. The method is high in impact load resistance, the total removal rate of antibiotics in the wastewater is larger than 70%, the addition amount of alkali can be reduced, the operation