Kasco

Floating Surface Aerator

Name: Floating Surface Aerator
Brand: Kasco

Floating surface aeration for wastewater lagoon cells, sized by organic load. Quoted to your site with freight and power service accounted for.

What it is

A floating surface aerator transfers oxygen by contacting water with air at the surface and mixes the upper water column. It suits shallow cells, supplemental summer oxygen and budgets that need a fast, relocatable install. Size it on pounds of BOD5 applied per day, not on surface acres.

Buy this when you are seeing

A cell that runs out of oxygen before sunrise
Duckweed re-establishing on still water
Seasonal load the existing system cannot absorb
A lagoon that needs oxygen without a construction project

FormFloating unit

Applied fromMoored on the cell, no shore structure

Dosed onPounds of BOD5 applied per day

TimelineImmediate once installed

How it works

A surface aerator transfers oxygen by contacting water with air at the top of the column, and mixes the upper water column as it does so. That is why it installs fast and relocates easily: nothing is fixed to the bottom and nothing is built on shore.

The trade is efficiency and depth. Published design references rate floating high-speed surface aerators around 1 to 1.2 kilograms of oxygen per kilowatt-hour, with larger low-speed units reaching roughly 2 to 2.5 kg per kWh. A well-designed diffused system uses roughly half the energy for the same duty, and mixes the full column rather than the top of it.

Check these before you buy

These decide whether this product can work at all. If one fails, fix that first, because the money spent here will not survive it.

Run a current loading calculationOxygen demand follows pounds of BOD5 applied per day, not surface acres. Two five-acre cells with different loads need very different horsepower.
Check the mixing requirement separately from oxygenIn partial-mix cells the horsepower needed to keep the cell mixed often controls the design. Sizing on oxygen alone produces a system that looks adequate on paper and shows dead zones in the water.
Confirm the cell is not simply overloadedNo aerator purchase resolves a 3x organic overload on its own. If loading is far above design, the fix is pretreatment at the contributor.
Have a winter plan before you buyExposed surface units need manufacturer-specific winter management, and in hard-freeze climates many operators pull or protect splash-style units for the season.

Is this the right fit

Good fit for

Shallow cells where full-column mixing is not the constraint
Supplemental or seasonal oxygen on top of an existing system
Fast installation without a construction project
Systems whose loading is changing and may need units relocated

Not the answer for

Deep cells with a building sludge blanket, where diffused air mixes better
Hard-freeze climates without a plan to pull or protect exposed units
Correcting a raw organic overload, which is a pretreatment problem

Dosing and application

Sizing basis: Pounds of BOD5 applied per day, with roughly 1.5 pounds of oxygen per pound of BOD5 as the common planning factor. Run the sizing calculator for a planning range, then confirm with an engineer.
Mounting: Mooring lines or cable. No shore structure required, which is why installation is measured in hours rather than in a construction season.
Power: Shore power. Service size is confirmed at quote against the units and configuration selected.
Relocation: Units can be repositioned as loading shifts between cells, which is the main operational advantage over a fixed diffuser grid.

Floating surface aerators are the fastest way to put oxygen into a lagoon cell. They mount on mooring lines or cables, need no shore structure, and can be moved as loading shifts. That flexibility is the reason they remain the default first aeration purchase for small systems.

The trade is efficiency and depth. Surface units use more energy per pound of oxygen delivered than a well-designed diffused system, and they mix mainly the upper water column, which does less for a sludge blanket forming on the bottom. Published design references rate floating high-speed surface aerators around 1 to 1.2 kilograms of oxygen per kilowatt-hour, with larger low-speed units reaching roughly 2 to 2.5 kg per kWh.

Before selecting a horsepower class, get a current loading calculation. Design references commonly size oxygen supply at roughly 1.5 pounds of oxygen per pound of BOD5 applied. If your cell is receiving substantially more organic load than it was designed for, no aerator purchase resolves that on its own, and the fix is at the contributor.

Specifications

Type	Floating surface aerator
Mounting	Mooring lines or cable, no shore structure required
Mixing	Upper water column
Winter	Exposed unit, needs manufacturer winter management
Power	Shore power, service size confirmed at quote

Common questions

How many of these does my lagoon need?

There is no per-acre shortcut. Oxygen demand follows pounds of BOD5 applied per day, and in partial-mix cells the horsepower needed for mixing often controls the design instead of oxygen transfer. Run the sizing calculator, then confirm with an engineer for a permitted system.

Why is there no price on this page?

Surface aerators ship by freight and delivered cost depends on your site, your power service and your install. Quoting means the number you receive already includes those, rather than a list price plus a freight surprise later.

Will this run through the winter?

Exposed surface units need manufacturer-specific winter management, and in hard-freeze climates many operators pull or protect splash-style units for the season. If you need continuous winter aeration, look at diffused systems where the blower sits on shore.

Read before you buy

Aeration