Biological rotating disc

The utility model relates to the technical field of water environment treatment, and particularly discloses a biological rotating disc which comprises disc pieces and a rotating shaft, the rotating shaft stretches across a river channel, the two ends of the rotating shaft are fixed to the two sides of the river channel respectively, a plurality of disc pieces are arranged on the rotating shaft, and each disc piece can rotate on the rotating shaft. The embodiment of the utility model provides a biological rotating disc. A rotating shaft is arranged across a riverway; the disc is arranged on therotating shaft; when a water flow flows, the water flow flows, the disc can rotate along with flowing of water flow. A biological biofilm is formed on the disc, has a degradation effect on pollutantsin the water body, has a certain aeration effect along with rotation of the biological rotating disc, can achieve a certain removal effect on ammonia nitrogen, and can improve dissolved oxygen in thewater body, so that the wa