Submersible Aerators And Mixers
Immersible Aerator
Self priming aerator for oxygen transfer and mixing in basins.
View specifications →Submersible Aerators And Mixers
SKCB Submersible Aerator
Pump, air blower and gas liquid mixer in one machine that works under water, drawing its own air down a pipe.
Overview
What This Pump Does
The SKCB submersible aerator is a self priming aerator for oxygenating and mixing in sewage water treatment. It integrates the pump, the air blower and the gas liquid mixer as one unit, and operates submerged, either on the bottom of the aeration pool or fixed to a floating body.
It is built from a star type impeller, a stator and an air pipe. Impeller rotation creates a vacuum in the stator that draws air down the pipe, water and air enter the impeller together, and the gas is dispersed into small bubbles of about 100 microns in diameter.
- Self priming for air, no external blower required
- Star type impeller with stator and air pipe
- Bubble size around 100 microns
- Bottom mounted or float mounted installation
Key Benefits
What One Machine Replaces
No Blower House
Pump, blower and mixer in one submerged unit removes the blower building, the air main and the diffuser grid.
Fine Bubble Dispersion
Air is dispersed into bubbles of around 100 microns, which is what makes the oxygen transfer effective.
Aeration And Mixing Together
The same machine that aerates also keeps the basin contents moving.
Fixed Or Floating
Placed on the bottom of the aeration pool or fixed to a floating body, depending on the basin.
Application Scenarios
Where It Is Installed
Activated Sludge Basins
Pre-gas supply, activated sludge treatment and sludge stabilisation stages.
Oxidation Ponds
Keeping large shallow volumes aerobic where a diffuser grid is impractical.
Flotation And Neutralisation
Gas floats, neutralisation, ozone treatment and liquid mixing duties.
Who It Is For
- Municipal sewage treatment works
- Industrial effluent plants
- Contractors upgrading basin aeration
- Operators avoiding a blower house rebuild
Problems It Solves
Aeration infrastructure costs too much
A submerged self priming unit removes the blower, the air main and the diffusers from the project.
Oxygen transfer is poor
Fine bubble dispersion at around 100 microns increases the air to water surface area.
Mixing needs a second machine
This unit aerates and mixes at the same time in activated sludge duty.
Technical Features
How It Is Built
- Self priming for air, no external blower required
- Star type impeller with stator and air pipe
- Bubble size around 100 microns
- Bottom mounted or float mounted installation
- Integrates pump, air blower and gas liquid mixer
- Designed for continuous submerged operation
Specifications
Technical Data
The table below is from the original SKCB data sheet. Unit count and placement depend on basin volume, depth and organic load.
- Self priming for air, no external blower required
- Star type impeller with stator and air pipe
- Bubble size around 100 microns
- Bottom mounted or float mounted installation
- Integrates pump, air blower and gas liquid mixer
- Designed for continuous submerged operation
| Model | Depth (meter) | Power (Kw) | Speed (rpm) | Air suction (Nm3/h) | O2 Input (KgO2/h) | Main convection | Sub convection |
|---|---|---|---|---|---|---|---|
| SKCB7.5 | 2 | 0.75 | 1450 | 10 | 0.37 | 1.2 | 2 |
| SKCB15 | 2 | 1.5 | 1450 | 22 | 1 | 1.5 | 2.5 |
| SKCB22 | 3 | 2.2 | 1450 | 35 | 2.75 | 2.5 | 5 |
| SKCB30 | 3 | 3 | 1450 | 50 | 3.8 | 2.5 | 5 |
| SKCB40 | 3 | 4 | 1450 | 75 | 5.3 | 3 | 6 |
| SKCB55 | 3 | 5.5 | 1450 | 85 | 5.5-7.7 | 3.5 | 7 |
| SKCB75 | 3 | 7.5 | 1450 | 100 | 8.2 | 4.5 | 9 |
| SKCB110 | 4 | 11 | 1450 | 160 | 13 | 5 | 10 |
| SKCB150 | 5 | 15 | 1450 | 200 | 17 | 5.5 | 11 |
| SKCB185 | 5.5 | 18.5 | 1450 | 260 | 19 | 6 | 12 |
| SKCB220 | 6 | 22 | 1450 | 320 | 24 | 6 | 12 |
Materials And Process
What Goes Into Every Unit
Materials
- Stainless steel and cast components suited to submerged duty
- Star type impeller and stator assembly
- Air pipe and mounting arrangement
Manufacturing And Assembly
- Impeller and stator machining
- Motor and seal assembly for submerged service
- Run test before packing
- Documentation with the order
Quality Control
- Seal and cable entry checked for submerged duty
- Run test before dispatch
- Factory acceptance test record available
Customization Options
- Bottom or float mounting arrangement
- Guide rail and lifting arrangement
- Motor rating and cable length
- Air pipe configuration for basin depth
Compared With Other Options
| Jet aerator | The jet aerator drives a mixed stream across a wider shallow volume. This unit suits deeper basins with a compact footprint. |
|---|---|
| Diffuser and blower system | A diffuser grid needs a blower house, an air main and periodic membrane replacement. This unit puts the whole function in the basin. |
Use Guide
Installing A Submersible Aerator
Size On Load
Work from basin volume, depth and organic load rather than copying a machine size from another plant.
Plan The Lift
Fit guide rails or a lifting arrangement so the unit can be recovered without draining the basin.
Route The Air Pipe
Keep the air intake clear of spray and foam, and check it during routine inspection.
Check Transfer Periodically
Monitor dissolved oxygen so a drop in transfer is noticed before the process suffers.
Answers
SKCB Submersible Aerator FAQ
Does it need a separate blower?
No. The unit is self priming for air: impeller rotation creates the vacuum that draws air down the pipe.
How fine are the bubbles?
The gas is dispersed into small bubbles of about 100 microns in diameter.
Where is it installed?
On the bottom of the sewage aeration pool, or fixed to a floating body.
Which treatment stages use it?
Pre-gas supply, activated sludge treatment, sludge stabilisation, gas floats, neutralisation, ozone treatment, oxidation ponds and liquid mixing.
Can it be lifted for service?
Yes where guide rails and a lifting arrangement are fitted, which should be specified with the order.
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Industries Guides And Solutions
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