A submersible mixer is a mechanical device that is used to mix sludge tanks and other liquid volumes. Submersible mixers are often used in

sewage treatment plants Sewage treatment (or domestic wastewater treatment, municipal wastewater treatment) is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for discharge to the surrounding en ...

to keep solids in suspension in the various process tanks and/or sludge holding tanks.

Working principle

The submersible mixer is operated by an electric motor, which is coupled to the mixer's propeller, either direct-coupled or via a

planetary gear An epicyclic gear train (also known as a planetary gearset) consists of two gears mounted so that the center of one gear revolves around the center of the other. A carrier connects the centers of the two gears and rotates the planet and sun gea ...

-reducer. The propeller rotates and creates liquid flow in the tank, which in turn keeps the solids in suspension. The submersible mixer is typically installed on a guide rail system, which enables the mixer to be retrieved for periodic inspection and preventive maintenance.

Applications

Examples of applications where submersible mixers are commonly applied: * Anoxic/anaerobic tanks and oxidation basins (

activated sludge The activated sludge process is a type of biological wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa. It uses air (or oxygen) and microorganism ...

) at sewage treatment plants * IFAS, MBBR, and other fixed film biocarrier processes. * Mixing of sewage wet wells * Reception tanks and post-digestion tanks at

biogas Biogas is a mixture of gases, primarily consisting of methane, carbon dioxide and hydrogen sulphide, produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste and food waste. It is a ...

facilities * Liquid Manure storage tanks at dairy, hog, and poultry farms * Waste processing at slaughterhouses, poultry abattoirs, fish processing plants, etc.

References

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