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Submerged aeration is created by the action of submerged aerators (air diffuser, static mixer, sparge turbine, jet aerator, etc.), which introduce compressed air or oxygen at or near the bottom of an aeration basin. Oxygen transfer and liquid mixing are achieved as air/oxygen bubbles rise to the water surface. This chapter discusses the topics of aeration performance, oxygenation, deoxygenation, oxygen...
The purpose of filtration is to remove the particulates suspended in water by passing the water through a layer of porous material. Larger particulates are retained by straining and sedimentation, while colloidal matter is retained by adsorption, or coagulation and sedimentation. Biological interactions occur only when the water passes very slowly through the porous mass.
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