Device and method for removing nitrobenzene, aniline and nitrate in underground water

The invention discloses a device and a method for removing nitrobenzene, aniline and nitrate in underground water. The device for removing the nitrobenzene, the aniline and the nitrate in the underground water comprises a water tank, a biological membrane chamber, a circulating pipeline, a one-way valve, a biological membrane carrier, a circulating pump, a carbon source tank and an air valve, the water tank is provided with a water inlet, a water outlet and a sampling port, and the liquid inlet end of the biological membrane chamber is communicated with the water tank through the one-way valve; the liquid outlet end of the biological membrane chamber is communicated with the water tank through a circulating pipeline, the biological membrane carrier is arranged in the biological membrane chamber, the circulating pump is installed in the water tank and connected to the one-way valve so that liquid in the water tank can enter the biological membrane chamber, and the carbon source box is connected to the water ta