The role of sedimentation tanks in water treatment and environmental protection is significant. Their main functions are as follows:

Removal of suspended solids: 

Sedimentation tanks utilize gravity to naturally settle solid particles in the water to the bottom, removing larger particles such as sand and dirt. These particles, if not removed in a timely manner, can cause damage to subsequent treatment equipment and even affect their normal operation.

Removal of fine suspended matter: 

Sedimentation tanks can also remove smaller suspended matter, such as tiny suspended particles and organic matter. Although these substances are present in small quantities in the water, their long-term accumulation can still affect water quality and increase the difficulty of subsequent treatment.

Reduction of turbidity: 

When there are a large number of suspended solid particles in the water, its turbidity is relatively high, which affects people's visual perception of water quality. By introducing sedimentation tanks, the suspended solid particles in the water settle down, thereby reducing turbidity and making the water clearer and more transparent.

Buffering effect: 

In some treatment systems, there may be large fluctuations in water flow velocity, which can affect the operating efficiency of subsequent treatment equipment. By setting up sedimentation tanks, the flow velocity of water can be slowed down, allowing it to stay in the tanks for a period of time to stabilize water quality and reduce impact on subsequent treatment equipment, thereby improving treatment efficiency.

In addition, sedimentation tanks are widely used in wastewater treatment, post-treatment of biological treatment, and advanced treatment. In post-treatment of biological treatment, sedimentation tanks can be used to further remove suspended solids and impurities. In the field of advanced treatment, the settled principle can be applied to remove suspended solids from water after adding flocculants to the effluent from secondary sedimentation tanks.

In summary, sedimentation tanks play a crucial role in water treatment systems. They separate and settle solid particles in water, purify water quality, and protect the normal operation of subsequent treatment equipment. By introducing sedimentation tanks, water quality improves, becoming clearer and more transparent, which helps to enhance the treatment efficiency and stability of water quality in water treatment systems.