Sedimentation Equipment

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Sedimentation Equipment

When designing wastewater treatment plants, the sedimentation tanks have an essential influence on the efficiency and costs of wastewater treatment plants. Sedimentation is the process of retaining water in a settling basin to remove suspended solids. Particles that are heavier than the water will settle to the bottom forming a sludge which is later removed. It is important that the water pass through the tank with minimum turbulence.

The efficiency of the sedimentations tanks is mainly influenced by the hydraulic and biochemical conditions, such as:

Aufzählung

MLSS concentration in the activation tank

Aufzählung

hydraulic loads

Aufzählung

floc structure

The bottom-near wastewater inlet has the effect that those solids with the highest specific density are retained directly in the section of the floc filter in the sludge thickening zone. This reduces the solids concentration in the wastewater flow rapidly and a bigger sedimentation volume is available for the remaining suspended solids of a lower specific density. By this specific increase in volume, with the building volume remaining the same, the sedimentation time is extended and the negative impact of the solids concentration on the sedimentation process is minimized.