Is the aerobic tank an aeration tank?

Aeration tank is used to treat sewage by activated sludge process, which provides a certain sewage retention time to meet the oxygen demand of aerobic microorganisms and the mixing conditions of full contact between sewage and activated sludge.

Aeration is a means to make air contact with water strongly, and its purpose is to dissolve oxygen in the air in the water, or to banish unnecessary gases and volatile substances in the water into the air. In other words, it is a means to promote the exchange of substances between gas and liquid. It has some other important functions, such as mixing and stirring.

Extended data

Methods used in aeration tank:

Activated sludge process is a kind of wastewater biological treatment technology, which is the main method of wastewater biological treatment with activated sludge as the main body. In this technology, wastewater is mixed with activated sludge (microorganisms) and aerated to decompose organic pollutants in wastewater, and then biosolids are separated from the treated wastewater, some of which can be refluxed to the aeration tank as needed.

Activated sludge process is a sludge-like floc formed by continuously aerating air into wastewater and propagating aerobic microorganisms after a certain period of time. It is inhabited by microbial groups, mainly bacterial micelles, which have strong adsorption and oxidation capabilities for organic matter.

Activated sludge process is a biological sewage treatment method. In this method, under the condition of artificial oxygenation, sewage and various microbial groups are continuously mixed and cultured to form activated sludge. Organic pollutants in sewage are decomposed and removed by biological coagulation, adsorption and oxidation of activated sludge. Then the sludge is separated from water, most of the sludge flows back to the aeration tank, and the rest is discharged from the activated sludge system.

The main factors affecting the working efficiency (treatment efficiency and economic benefit) of activated sludge process are the selection of treatment methods and the design and operation of aeration tank and sedimentation tank.

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