Photocatalysis-autotrophic denitrification coupled reactor

The invention provides a photocatalysis-autotrophic denitrification coupled reactor, comprising an LED visible light source, an anode chamber and a cathode chamber, wherein the anode chamber and the cathode chamber are separated by a proton membrane; a vertical photoelectric anode plate coated with a photocatalyst is arranged in the anode chamber; a side plate of the anode chamber is a light-transmitting plate; light can be projected onto the vertical photoelectric anode plate through the side plate so as to generate electrons and holes, and the holes can treat organic wastewater fed into theanode chamber; and a cathode plate loaded with denitrifying microorganisms is arranged in the cathode chamber, electrons generated by the anode plate are transmitted to the cathode plate through a wire and supplied to the denitrifying microorganisms for promotion of a denitrification reaction so as to realize treatment of high-nitrogen low-carbon wastewater fed into the cathode chamber. Accordingto the invention, photocat