The invention relates to an
activated sludge process and
biofilm process combined
wastewater treatment device. The device comprises a treatment tank, a partition plate is fixed in the treatment tank,a
wastewater inlet
pipe is connected to a water distribution cavity, and a gap is formed between a lower end of the partition plate and a bottom wall of the treatment tank. A microporous aerator is arranged at a bottom of the reaction cavity, the microporous aerator is connected with an
aeration pipeline, a filler frame is arranged in the reaction cavity, a combined filler is suspended on the filler frame, a
sedimentation tank is attached to one side of the treatment tank, an upper end of the reaction cavity is level with an upper end of the
sedimentation tank to form an overflow port, an upper part of the
sedimentation tank is provided with a water outlet, the water outlet is lower than the overflow port, a bottom of the sedimentation tank is provided with a
sludge return pipeline, the
sludge return pipeline is provided with a
sludge pump and a return switch, and a bottom of the treatment tank is provided with a sludge outlet. The device is simple in structure and small in occupied area, the concentration of
activated sludge can reach 5-6 g / l, the removal rate of COD, BOD and
ammonia nitrogen is up to 90% or above, the
total nitrogen removal efficiency is 60% or above, and the operation cost is low.