《Horizontal Flow Sedimentation Pond and Inclined Tube Sedimentation Pond: Differences in Sedimentation Principles and Effects》

In the wastewater treatment engineering, the sedimentation pond is one of the common treatment facilities, whose main function is to make the suspended matter in the water settle to the bottom of the pool under the action of gravity, thus achieving solid-liquid separation. The horizontal flow sedimentation pond and the inclined tube sedimentation pond are two common types of sedimentation ponds, each with different sedimentation principles and treatment effects. This article will compare and analyze the sedimentation principles and treatment effects of these two types of sedimentation ponds.

One, Comparison of sedimentation principles

Horizontal flow sedimentation pond

The sedimentation principle of the horizontal flow sedimentation pond is mainly based on the horizontal flow of the water flow. When the wastewater flows through the sedimentation pond at a stable flow velocity, the suspended particles in it gradually sink to the bottom of the pool under the action of gravity, and separate from the water. The bottom of the horizontal flow sedimentation pond is equipped with a mud discharge device, which regularly discharges the sediment from the pool to maintain the normal operation of the sedimentation pond. The horizontal flow sedimentation pond is suitable for treating water bodies with low suspended solids concentration, and there are no special requirements for the size and shape of suspended particles.

Inclined tube sedimentation pond

The sedimentation principle of the inclined tube sedimentation pond is based on the supporting effect of the inclined tubes. The inclined tubes are composed of a series of inclined plastic tubes, whose function is to guide the water flow, making the water flow form turbulence inside the inclined tubes, thereby increasing the contact area between the water flow and the sediment particles, and accelerating the sedimentation speed. When the wastewater flows through the inclined tubes, suspended particles settle along the surface of the inclined tubes under the action of gravity, and finally separate from the water. The inclined tube sedimentation pond is suitable for treating water bodies with high suspended solids concentration, diverse particle sizes, and shapes, and the supporting effect of the inclined tubes can effectively improve the sedimentation efficiency and reduce the occupied area of the sedimentation pond.

Two, Comparison of sedimentation effects

Sedimentation effect

The sedimentation effect of the horizontal flow sedimentation pond mainly depends on the flow velocity and residence time of the water flow. Excessive flow velocity will cause suspended particles to fail to settle, while slow flow velocity will lead to a decrease in sedimentation efficiency. The sedimentation effect of the horizontal flow sedimentation pond is greatly affected by the size and shape of suspended particles, and has a good removal effect on large particle suspended solids, but a relatively poor removal effect on fine suspended solids.

The sedimentation effect of the inclined tube sedimentation pond mainly depends on the supporting effect of the inclined tubes and the degree of turbulence of the water flow. The sedimentation effect of the inclined tube sedimentation pond is not affected by the size and shape of suspended particles, and it can effectively remove particles of different sizes and shapes with a high removal rate. The sedimentation effect of the inclined tube sedimentation pond mainly depends on the supporting effect of the inclined tubes and the degree of turbulence of the water flow. The supporting effect of the inclined tubes can effectively increase the contact area between the water flow and the sediment particles, improve the sedimentation efficiency, while the degree of turbulence of the water flow can effectively reduce the sedimentation resistance of the sediment particles, improve the sedimentation speed.

Three, Conclusion

The horizontal flow sedimentation pond and the inclined tube sedimentation pond have their own characteristics in terms of sedimentation principles and effects. The horizontal flow sedimentation pond is suitable for water bodies with low suspended solids concentration, and there are no special requirements for the size and shape of suspended particles; the inclined tube sedimentation pond is suitable for water bodies with high suspended solids concentration, diverse particle sizes, and shapes, and has a high removal rate. In practical applications, the appropriate sedimentation pond type should be selected according to the specific conditions of the water body to achieve the best sedimentation effect.