The invention discloses a new method of urban
sewage treatment. The method comprises the following steps: 1,
sewage enters into a coarse screen well to remove a large volume of pollutants; 2, fine screens of a fine screen well intercept impurities and large particulate matters in the
sewage; 3, sediments in the sewage are deposited by a grit chamber; 4,
sludge in a secondary
sedimentation tank flows backs to the front end of a biochemical
pool group, and bacterial
flora taking
genus bacillus microorganisms as dominant
bacteria is added into the biochemical
pool group; 5,
effluent water of the biochemical
pool group flows into the secondary
sedimentation tank, and
sludge-water separation is performed in the secondary
sedimentation tank; 6,
effluent water of the secondary sedimentation tank flows into a disinfection
system and is discharged by a water metering tank. By adopting the technical scheme of the invention, due to the fact that the bacterial
flora taking the
genus bacillus microorganisms as the dominant
bacteria is added into the biochemical pool group so as to achieve the following beneficial effects that the capability of
nitrogen and
phosphorus removal is efficient, no extra deodorization
system is needed, the cost of investment is greatly reduced,
energy conservation and space saving are realized, and the discharged
water quality is good.