Precipitation filtration equipment

1. design flow 

   The design of the tank flow and grit chamber design flow is the same. At the confluence of the sewage treatment system, when the wastewater is themselves go into the tank, should according to the maximum flow as the design flow; When using water pump improvement, should be the biggest combination according to the water pump flow as the design flow. Should be according to the rainfall in the system of the confluence system design flow, but the settling time should be not less than 30 min.

2, sedimentation tank only

The urban sewage plant of settling basin, only the number should be not less than 2 only.

3. The experience of the sedimentation tank design parameters

   For urban sewage treatment plants, such as no sewage sedimentation performance of the measured data, but reference parameters using experience.

4. The effective depth of sedimentation tank, settling time, and the relationship of the surface of hydraulic load, general reference to the design specification. 

5. Settling basin geometry size

    Tank ultra-high not less than 0.3 m; Buffer layer using 0.3 0.5 m; Storage bucket the Angle of inclined wall, side should not be less than 60 DHS, round pipe should not be less than 55 DHS; Dredge pipe diameter should not less than 200 mm.

 6. Tank water

7. Storage bucket volume

Generally is calculated based on sludge quantity is not more than 2. For the secondary sedimentation tank, according to the mud storage time less than 2 hour meter.

8. Mud

Settling basin generally adopt hydrostatic pressure mud, hydrostatic pressure numerical value is as follows: primary sedimentation tank should be not less than 14.71 kPa (1.5 mH20); Activated sludge process of the second pond should be not less than 8.83 kPa (0.9 mH20); Biological membrane method of the second pond should be not less than 11.77 kPa (1.2 mH20).