The invention discloses a multi-point water inlet
aeration anoxic-aerobic high-efficient
nitrogen and
phosphorus removal method. The method sequentially comprises the following steps of: (1) introducing
sewage to be treated into a grille regulating tank through a water inlet
pipe; (2) dividing the water after pretreatment by the grille regulating tank into two lines, wherein one line leads to an
aeration tank and the other line leads to an anoxic tank; (3) sending the water in the anoxic tank into an aerobic tank; (4) dividing nitrified water after
nitrification treatment in the aerobic tank into two lines, wherein one line returns to the anoxic tank, and the other line flows into a
precipitation tank to perform mud-water separation; and (5) lifting
sludge through a
sludge lifting device, transporting the residual
sludge to the outside through a sludge
discharge pipe after passing through a sludge
treatment system, and returning the sludge after lifting into the
aeration tank. The method disclosed by the invention is suitable for new and transformation upgrading projects of high-
ammonia nitrogen village and
small town / industrial
sewage treatment works, has the advantages of simplicity and convenience in management and maintenance, low cost, good treatment effects, strong
nitrogen removal effect and the like, and is less affected by climatic conditions.