Synchronous denitrification nitrogen and phosphorus removal double-sludge sewage treatment system

[0034] Example 1:

[0035] Such as figure 1 As shown, a simultaneous denitrification and denitrification and dephosphorization double-sludge sewage treatment system includes a raw water tank 1, a pH adjustment tank 2, a flocculation tank 3, a sedimentation tank 4, a sewage distribution tank 5, an anaerobic tank 6, and a sedimentation tank 2. 7, anoxic tank one 8, sedimentation tank three 9, aerobic tank 10, sedimentation tank four 11, anoxic tank two 12, sedimentation tank five 13, BAF biological aerated filter one 14, BAF biological aerated filter two 15.

[0036] The original water tank 1 is connected to the pH adjustment tank 2, the flocculation tank 3, and the sedimentation tank 4 in turn through pipelines. A flocculant adding pipe is connected to the flocculation tank 3. The flocculation tank 3 is provided with a vertical stirring device, a support is fixed on the flocculation tank 3, and a motor is fixedly installed on the support, and the stirring device is driven to rotate b

[0048] Example 2:

[0049] Such as figure 2 As shown, a simultaneous denitrification, denitrification and phosphorus removal double-sludge sewage treatment system, different from Embodiment 1, further includes a photocatalytic tank 16, and the sedimentation tank 513 is connected to the photocatalytic tank 16 through a pipeline.

[0050] The photocatalyst added in the photocatalytic pool 16 is zeolite fine particles adsorbing nanometer titanium dioxide.

[0051] By subjecting the finally obtained wastewater to photocatalytic treatment, the remaining chemical substances can be decomposed in a certain amount, and certain bacteria can be killed, so that the pollution of the discharged wastewater after the treatment is further reduced.