Disc Diffusers vs. Tube Diffusers

By: Tom Frankel
Post Date: July 24th 2020

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disc diffusers vs tube diffusers

Disc Diffusers vs. Tube Diffusers

In wastewater aeration systems, fine bubble diffusers are known for their incredible oxygen transfer efficiency and their energy consumption savings. They can reduce aeration energy consumption by 25% to 75% — and coarse bubble diffusers are renowned for their mixing power.

Aeration diffusers come in a few different styles — two popular ones are tube diffusers and disc diffusers. In this guide, we’ll discuss what the pros and cons of tube diffusers and disc diffusers are and how plants can choose the best fit for their wastewater applications.

What Is the Difference Between Disc Diffusers and Tube Diffusers?

The main difference between disc diffusers and tube diffusers is their shape. Disc diffusers generally have flat, circular shapes, whereas tube diffusers are long, narrow cylinders. Both are useful for supplying oxygen in wastewater aeration applications.

Disc Diffusers

How do disc diffusers work, and what are some of the benefits of disc diffuser aeration systems?

Disc diffusers, especially 9-inch fine bubble disc diffusers, are extremely common in the wastewater treatment industry. They typically consist of disc-shaped ceramic, plastic or EPDM rubber membranes attached to a system of pipes and blowers. The blowers send air through the pipes, and the air flows out in bubbles through tiny slits or pores in the diffuser membranes. The bubbles then aerate the wastewater by transferring oxygen to the water column.

Diffusers may have additional protective coatings such as PTFEFEPDMTM or Viton® coatings to help protect against fouling.

Pros of Disc Diffusers

Some of the advantages of disc diffusers include the following:

Cons of Disc Diffusers

Some of the disadvantages of disc diffusers include the following:

Uses for Disc Diffusers

Disc diffusers are particularly ideal for use in the following scenarios:

Tube Diffusers

How do tube diffusers work, and what are some of the benefits of tube diffuser aeration systems?

Tube diffusers work very similarly to disc diffusers. They typically consist of long, cylindrical membranes that attach to pipe and blower systems to assist with wastewater aeration. They may also make use of protective coatings to reduce fouling.

Pros of Tube Diffusers

Some of the advantages of tube diffusers include the following:

Cons of Tube Diffusers

Some of the disadvantages of tube diffusers include the following:

Uses of Tube Diffusers

Tube diffusers are particularly useful in the following scenarios:

How to Choose the Right Diffuser for Your Aeration System

Should you use disc or tube diffusers for wastewater treatment? When you’re considering disc or tube diffusers, determine the highest priorities for your plant. If low maintenance and a long lifespan are a priority and you have shallower tanks or plan to use fixed systems, disc diffusers may be the best option. Alternatively, if you plan to use retrievable systems or have deeper, narrower tanks, tube diffusers may provide more benefits.

SSI Aeration: Worldwide Provider of Disc and Tube Diffusers

Whether you need disc diffusers or tube diffusers for your wastewater aeration system, let SSI Aeration be your trusted source. Our experienced engineering teams and industry-leading technology make our diffuser systems some of the best in the business — including our PODs preassembled disc diffuser system, which allows for quick and easy installation.

Contact us today to learn more.