The invention discloses a novel tunnel type
fixed bed reactor for
sewage treatment, and belongs to the technical field of
sewage treatment. According to the technical scheme, the
fixed bed reactor is provided with a water inlet and a water outlet, a plurality of filler assemblies are fixedly installed in the
fixed bed reactor, and the filler assemblies are immersed in
sewage; the filler
assembly comprises a plurality of biological fillers, each biological filler is provided with a channel, an aerobic
biological membrane grows on a water inlet section on the inner wall of each channel, and an anoxic
biological membrane grows on a water outlet section on the inner wall of each channel; the filler
assembly is formed by connecting a plurality of biological fillers in parallel, or connecting a plurality of biological fillers in series to form a biological filler group and then connecting a plurality of biological filler groups in parallel; an aerator is mounted on the side surface of the bottom of the filler
assembly. The fixed
bed reactor disclosed by the invention can realize the effects of aerobically removing organic matters, nitrifying and denitrifying
nitrogen removal and the like without partitioning, the treatment efficiency is greatly improved, an internal
reflux device is not needed, the process unit combination is reduced, and the device cost and the
operating cost are reduced.