Combined biological rotating disc treatment device

The utility model discloses a combined biological rotating disc treatment device. The device comprises a biological rotating disc, a rotating shaft and a combined biological rotating disc treatment device body, the biological rotating disc consists of a biological rotating disc main body, a biological film and a fixed clamping plate; a biological membrane is fixedly arranged on the surface of thebiological rotating disc main body; a mounting groove for mounting a fixed clamping plate is formed in the inner side of the upper part of the biological rotating disc main body; the fixed clamping plate is inserted into the mounting groove; the fixed clamping plate is fixedly connected with the biological rotating disc main body through screws, the fixed clamping plate is composed of an arc-shaped plate, a connecting plate, a side edge limiting plate and a positioning pin, the arc-shaped plate and the connecting plate are of an integrated structure, the arc-shaped plate and the edge of the biological rotating disc ma