Soluciones Austral Ltda. Engineering and Consulting

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Microalgae Bloom Mitigation                                                                                                           








                 Flujo Laminar                                                Flujo Turbulento

The size of the bubbles.









Not all bubbles are formed in the same way and there is a significant difference in the way that "Thick bubbles" and "fine bubbles" move through the water. In general, a thick bubble is one that has a diameter greater than 1/8 "and has an ascension rate of 0.24 meters / second or more.

Bubbles formed with our patented LTC tubing have a diameter between 1/64 "and 1/8" and a rise speed of less than 0.240 meters per second. The gentle elevation and mixing of fine bubble aeration as it flows through the water is classified as "laminar flow" (non-turbulent).

In fluid dynamics, laminar flow occurs when a fluid flows in parallel layers, without interruption between the layers. At low speeds, the fluid tends to flow without lateral mixing, and the adjacent layers slide on each other as when mixing cards from a deck.

There are no transverse currents perpendicular to the direction of flow, nor swirls.

In the laminar flow, the movement of the fluid particles is very orderly

all the particles moving in straight lines parallel to the walls of the pipe. The Laminar Flow is characterized by a high moment of diffusion and a low moment of convection.

In the following illustration, you can see the difference between a bubble curtain with laminar flow and another with turbulent flow.

Also, it has been demonstrated that bubbles greater than 1/4 "in diameter have a low mixing capacity, due to the turbulent flow that causes two or more bubbles to collect. This effect, called coalescence, makes the bubbles in this type of systems, although at the point of exit of the pipe its diameter is small, during the process of ascent they join together with others causing the final size to be greater than 1 "


Loss of charge:

ü  Compressor-control panel:                                               0,10 bar

ü  Control panel:                                                                       0,01 bar

ü  Compressed air pipes to LTC pipe:                                 1,40 bar

ü  LTC diffusion pipe:                                                               0,50 bar

ü  Losses per hydraulic load at 20 meters:                        2,00 bar         

                  Estimated total loss of load:                                   4,01 bar


Installation and Post sale

Soluciones Austral, can provide after-sales service. Our local services include:
Installation of systems with highly qualified divers

Project management

Implementation of the systems

Assistance and advice on the application

Assistance throughout the territory


After sales service with spare parts in Chile.

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Soluciones Austral Ltda. Puerto Montt, Chile


The bubble curtain

The use of air bubble curtains as an acoustic barrier in underwater work or as a protection system in swimming areas, is a relatively recent technology. A correctly designed system of air bubbles serves as a physical barrier to prevent small living creatures, garbage, algae or jellyfish from entering public bathing areas on public beaches.

In the aquaculture sector, our aeration systems have also been used to increase oxygen levels within fish cages.

The system consists of creating a compact structure of micro-air bubbles with a slow rise speed.

Large bubbles rise to the surface faster than fine bubbles. These thick bubbles create what we call turbulent flow, and bubbles of small size produce the so-called laminar flow. The turbulent flow produces unnecessary oxygen and energy expenditure and a situation of stress to the fish; on the other hand, the laminate offers optimized oxygen and energy consumption and contributes to the welfare of the fish.

A homogeneous, non-turbulent air curtain causes a lateral water movement equivalent to 3,000 m3 / day for each linear meter of the same.

This displacement of water causes the particles in suspension existing in the aqueous medium to move laterally, preventing them from passing through the bubble barrier.

When the bubble flow is turbulent, it generates a mixture of the particles in suspension with the mass of air, resulting in a mixture of said particles on both sides of the air curtain.

Our LTC diffusion pipe produces millions of bubbles of small size which makes us have a very high surface area.

These bubbles ascend to the surface at low speed producing a lateral displacement effect without turbulence.




Sinkable LTC diffusion pipe.

Our LTC pipe is made of high density PVC, self-weighed and with carbon additives to provide resistance to ozone and UV radiation.

Its very special characteristics, provide extreme durability, high performance and avoid all types of weights or additions to avoid floating to the surface when filled with air.

Its patented system of air outlets through surgical micro-cuts, gives it a very special bubble-making capacity. These cuts are located on the top and sides of the pipe producing 5 bubbles per second for each cut.

One of the keys to the success of our LTC pipeline is the low head loss.
Our design allows differences in heights in the installation close to 1 m.




Dimensions and Characteristics

Model: triple cut LTC

Weight: 0.8 kg / meter

Optimum flow: 0.21 to 0.44 m3 / h per meter

Material: Pipe made of high density PVC, self-weighed and with carbon additives to provide resistance to ozone and UV radiation.

The OXICOM fine bubble diffusion self-weighed pipe has been designed to combine the highest oxygen transfer performance, with very low energy consumption, thus offering maximum efficiency in oxygen transfer to water, also avoiding coalescence of the bubbles.


High O2 transfers

Maximum lateral water evacuation

Homogeneous bubble production

Great robustness, with 5 years warranty

Extremely reliable with low maintenance cost.

Very intense aeration with more than a billion fine bubbles a day.

Minimum maintenance

High durability




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