Disc Diffuser For

Aquaculture

What are Disc Diffuser?

• The Disc diffuser are of two types, Fine and coarse bubble disc diffuser.

• It has advanced membrane technologies for superior aeration performance, flexibility, reliability and superior product life.

• Multiple membrane perforations are available to optimize the performance of the diffuser for maximum operating efficiency, air handling.

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Disc Diffuser

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Fine Bubble Disc Diffusers For Aquaculture

1. Along with surface aerators, fine bubble aeration is one of the most often selected solutions for aquaculture.

2. Installed at the bottom of the pond, fine bubble aerators release tiny bubbles that slowly rise to the surface of the water.

3. These thousands of tiny bubbles collectively have a very large surface area. As a result, they can efficiently and effectively transfer oxygen to the entirety of the water column.

Read more: Use of Disc Diffusers for Hatcheries

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Types Of Fine Bubble Disc Diffuser

1.Membrane Disc Diffusers

2.Tube Diffusers

3.Perforated Tubing

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Phone: +91 - 7285017087

Membrane Disc Diffuser

1. Typical membrane disk diffusers are going to be between 9″ and 11″ in diameter.

2. They are composed of EPDM rubber, mounted on a base plate, and will screw into a header or lateral.

3. The EPDM will expand as air is pumped through it, which will open hundreds of small perforations. This results in the release of thousands of fine bubbles (less than 2mm in diameter).

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Tube Diffusers• Most tube diffusers are made from a rigid ceramic or hollow

plastic cylinder.

• These cylinders are long and thin, and are surrounded by EPDM rubber.

• The air is transferred and released in the same manner as the disks, except tube diffusers generally offer more surface area than disks, and thus can release more fine bubbles.

Explore: AirOxi Tube Aerators – Aquaculture Aeration Solutions

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Perforated Tubing

• This type of diffuser, sometimes referred to as “Bubble Tubing,” is generally composed of LDPE with slits or holes punched in it.

• These small holes then leak air at pressurized airflow.

• However, this type of LDPE diffuser does not expand and contract to open these perforations in the same manner that the tube and disk diffusers do.

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The Benefits of Fine Bubble Aeration (Pros)

1. Energy Efficiency

2. Improved DO level

3. Fewer Motors To Maintain

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1. Energy Efficiency

• Boasting an Standard Aeration Efficiency (SAE) of 4–7 lbs O2/hr/hp-wire, very few aeration technologies can compete with the fine bubble in terms of energy efficiency.

• In many cases, switching from alternative lagoon aeration technologies, such as surface aeration or coarse bubble aeration, can save anywhere from 40–60% (or more) on energy costs.

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2. Improved Dissolved Oxygen

• Similarly, fine bubble aeration can also achieve Standard Oxygen Transfer Efficiencies (SOTE) of 1.8–2.2% per foot of submergence.

• Any other system on the market will have a very difficult time matching this type of oxygen transfer efficiency performance.

• If you’re installing a fine bubble aeration system in your wastewater lagoon, it’s safe to expect noticeable increases in dissolved oxygen (DO).

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3. Fewer Motors To Maintain

• In comparison to surface aerators, a fine bubble aeration system will likely have fewer motors to maintain.

• For example, where a typical surface aeration system may have 5–10 surface aerators, a fine bubble system will typically only have 2–3 blowers. Moreover, these motors are more easily accessible as they are onshore.

• This cuts down on maintenance time, materials, and hassle.

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The Disadvantages of Fine Bubble Aeration (Cons)

1. Difficult to Install

2. Fouling & Clogging

3. Insufficient Mixing

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1. Difficult To Install

• Many traditional fine bubble aeration systems are either secured to fixed laterals at the bottom of the lagoon, or hanging from floating laterals.

• With fixed laterals, the lagoon must be drained and desludged for the installation.

• You can expect this to be both costly and time consuming. With floating laterals, you’ll need to install the diffusers and laterals amphibiously this can be a laborious and potentially

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2. Fouling & Clogging

• Any fine bubble aeration technology is susceptible to bacterial fouling.

• This is the process whereby bacteria form on the surface of the diffuser and impinge upon the orifices.

• This causes increased back-pressure and wear on the blower, thereby increasing energy and maintenance costs.

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3. Insufficient Mixing• Fine bubble aerators are extremely efficient when it comes to

transferring oxygen. However, fine bubbles alone are not as effective when it comes to mixing.

• Fine bubbles rise through the water rather calmly, often allowing solids to settle. Fine bubbles can also fail to create the contact between microorganisms and nutrients that is necessary for a more efficient breakdown and overall water treatment.

• Over time this can lead to sludge buildup. Increased amounts of sludge result in less effective treatment overall, and the costly process of removing sludge from the wastewater lagoon.

Phone: +91 - 7285017087

Why AirOxi Tube?• AirOxi is one of the latest technologies for aquaculture

aeration.

• It is designed specially for commercial aquaculture and has been successfully installed in hundreds of acres of aquaculture ponds.

• It has high efficiency in both salt water and fresh water.

• It Helps to maintain water quality for fish culture and shrimp culture.

For more information visit: http://www.airoxitube.com/about-air-oxitube/

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