An Improved Method for Urban Sewage Treatment
A sewage treatment method and urban sewage technology, which is applied in the field of improved urban sewage treatment, can solve the problems of low removal rate, increased floor area, power consumption, investment cost, and operation cost, and achieve high-efficiency denitrification and phosphorus removal capabilities, discharge The effect of good water quality and reduced renovation cost
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[0027] Correspondingly, according to a typical implementation of the present invention, it mainly includes the following steps: sewage passing through municipal pipeline network → coarse grid well → sewage lifting pump well → fine grid well → grit tank → anaerobic zone → mixed water distribution zone (Three-dimensional rotating mesh contact body) → biochemical zone → secondary sedimentation tank → disinfection system → metering tank discharge.
[0028] According to a typical implementation of the present invention, in the process of using the BBR process (Bacillus) to transform the oxidation ditch process, the anoxic zone in the oxidation ditch process is transformed into a mixed water distribution zone, and only the anoxic zone in the oxidation ditch process A three-dimensional rotating mesh contact body is added to the mesh contact body, which can be directly suspended into the pool by a load-bearing beam built above the hypoxic zone. The sludge return in the secondary settling...
Embodiment 1
[0042] In the method for treating urban sewage of the present invention, the microorganisms include Bacillus microorganisms including Bacillus subtilis, Bacillus licheniformis, Bacillus cereus, Bacillus thuringiensis, Bacillus megaterium, Bacillus polymyxa, and amylolytic Bacillus and Bacillus pumilus, etc. The specific process is as figure 2 As shown, it mainly includes the following steps:
[0043] The first step: the domestic sewage enters the coarse grid well through the municipal pipe network to remove large-volume pollutants, the coarse grid mesh is 25-100mm;
[0044] Step 2: The effluent from the coarse grid well flows into the sewage lift pump well, and then is lifted from the sewage lift pump well to the fine grid well by the lift pump. The fine grid will intercept impurities and large particles in the water. The fine grid mesh is 1.5 ~25mm;
[0045] The third step: the water from the fine grid well flows into the grit chamber, which settles the sediment in the water;
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