Submersible Aspirating Aerator for Livestock Wastewater

Reference equipment image: Tsurumi Pump. The supplied configuration may differ.

Designed for the wastewater treatment area of a commercial livestock facility, this submerged unit combines air intake, oxygenation, and basin mixing. Its rotating hydraulic assembly creates a low-pressure region that draws ambient air through an intake pipe extending above the liquid surface. The air mixes with wastewater and disperses into the basin as the unit operates.

It can be considered for pig farm equalization tanks, aerobic treatment basins, and suitable manure wastewater lagoons. Final selection depends on wastewater characteristics, oxygen demand, tank geometry, operating water level, and the upstream solids-separation process.

• Self-aspirating operation draws air from above the water surface; the selected configuration generally does not require a separate compressed-air blower.
• Submerged discharge promotes oxygen distribution and circulation within the treatment basin.
• Compact in-basin arrangement suits new pig farm construction and selected wastewater system upgrades.
• Equipment layout, materials, electrical supply, and mounting arrangement can be selected according to project requirements.
• Accessible lifting provisions can simplify removal for inspection when included in the project design.

A typical assembly comprises a submersible motor, impeller or propeller, air-intake pipe, air-water mixing passage, discharge section, support base or mounting frame, power cable, and lifting connection. Wetted-part materials, sealing arrangement, motor protection, and corrosion protection are confirmed during model selection.

The submerged rotating assembly moves wastewater and produces a low-pressure region. Air is drawn down the intake pipe, mixed with the moving liquid, and discharged into the basin. The resulting air-water flow provides aeration and circulation. Actual oxygen transfer and mixing coverage depend on the selected unit, submergence, wastewater properties, and basin layout.

• Pig farm wastewater equalization and aerobic treatment basins
• Livestock wastewater lagoons where aeration is specified by the treatment design
• Aeration and mixing in agricultural wastewater treatment projects
• Retrofits where basin access and operating conditions permit a submerged unit

Screening or solid-liquid separation may be needed upstream when the wastewater contains large fibrous solids or debris.

Unit quantity and placement, motor selection, intake-pipe length, material selection, control integration, mounting frame, and lifting arrangement can be designed according to project requirements. For a steel structure wastewater building or covered treatment area, access openings, lifting clearance, ventilation, and cable routing should be coordinated with the building design. Equipment selection can also be designed according to local climate and farm conditions.

Position and secure the aerator in accordance with the approved basin layout, keeping the air inlet above the maximum operating water level. Provide suitable electrical protection and a safe means of lifting the unit. Routine checks should cover the air-intake path, impeller or propeller, cable, seals, fasteners, and any accumulated fibrous material. Inspection intervals depend on wastewater loading and operating conditions.

Does the aerator require an external blower?
The self-aspirating configuration draws ambient air through its intake pipe. The final air-supply arrangement should be confirmed for the selected model and treatment duty.

Can it treat raw pig manure slurry?
Suitability depends on solids size, fiber content, viscosity, and the selected equipment. Upstream screening or solid-liquid separation may be required.

What information is needed for selection?
Provide wastewater flow, treatment targets, influent characteristics, basin dimensions, minimum and maximum water levels, electrical supply, and site conditions.

Reference images: Tsurumi Pump. They illustrate the equipment type and a livestock wastewater application; they do not depict a SHEWUYOU installation.