Sedimentation in the treatment of waste water


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Before discussing the sedimentation in waste water treatment, first we discuss what is meant sedimentation. Sedimentation is the process of separation of solids in the waste water by gravity. Sedimentation is usually done after coagulation and flocculation process which aims to increase the solid particles that are heavier and sink in a short time.

Sedimentation can actually do can be done at the end or the beginning of the treatment process. If the turbidity of the influence is high, then performed at the beginning of sedimentation after coagulation and flocculation. Sedimentation is the second lies in the final processing to separate and collect the mud from the previous process.

Sedimentation in the treatment of waste water containing organic materials, bacteria, and so on which decompose to form gases, like carbon dioxide, methane, and so on. Gas is at a particle of mud which is when the gas went up and lifted pule sludge particles, causing damaging turbulence effects of sediment that has formed. To overcome this problem is to create designs with the sediment in such a way to avoid the effects of the gases that cause damage to the solid particles are formed. While in effect the process used to stir the sludge particles to be balanced between the gravity and lift force on the particle sludge particles so that the particles are floating.

Lastly for sedimentation treatment of waste water. After the process of decomposition and release of gas, mud condition is stable. So often the process of sedimentation in a long time called the process of stabilization. Accumulated sludge (volume) within a specific time period is an important parameter in the planning of waste water treatment by sedimentation and sludge stabilization.

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