Aerated pond in a rest area in Quebec

Aerated pond for Saint-Philippe-de-Néri’s rest area in Kamouraska, Quebec

Client’s need:

In 2015, the Quebec Ministry of Transport released a tender to bring a water treatment system located at a rest area on Highway 20, near Kamouraska, up to standard. According to the tender, the system must provide an oxygenation rate of a minimum of 2 mg/l to allow for a sufficient treatment. The daily water flow being highly variable due to the nature of the installation, the effluent tests must be done in season (in August).

Why operate aeration systems to treat wastewater and leachate?

Aeration and microbial action ensure the biological elimination of nutrients, mixing of liquids, increasing oxygen levels and oxidation, reducing harmful odors associated with hydrogen sulfide (H2S) and better sludge management. Cities, municipalities, slaughterhouses and other industries that generate wastewater or leachate are turning to aeration and microbial action to improve dissolved oxygen (DO) levels in their water treatment ponds. With Bubble Tubing® aeration, you maintain water quality parameters and achieve the biological oxygen demand (BOD) and the chemical oxygen demand (COD) levels required by your system.

Product sold:

A CanadianAir aeration system with ½ inch Bubble Tubing® diffusers was provided for two aerated ponds.

  • Based-mounted compressors
  • Linear diffusers Bubble Tubing®

Link to CanadianAir product page on

aeration of a pondBubble Tubing technology       

Exclusive to, Bubble Tubing® is a linear air diffuser for aeration, de-icing and bubble curtains. It is designed and manufactured in Canada under our specifications.

Fine bubble diffusers such as our Bubble Tubing® produce many tiny air bubbles (less than 1 mm in diameter). These tiny bubbles rise steadily from the depths of all manners of aquatic landscapes, from wastewater treatment basins, to waterways, canals, ponds, lakes and lagoons. These bubbles provide a substantial and efficient mass transfer of oxygen into water. This oxygen, combined with organic nutrient sources, such as sewage and sediments, allows naturally occurring bacteria to produce enzymes to help break these sources down.

Bubble Tubing® is a linear diffuser made using highly resistant and flexible PVC plastic hose, it keeps its shape and does not kink. When entering the tube, the compressed air creates an internal pressure. Precise perforations on both sides, going the entire length of the hose, allow this compressed air to be released in microscopic bubbles. Their size helps prevent the hose from fouling, a common problem seen in porous diffusers. Once released, the rising air forms a uniform bubble curtain that optimizes the transfer of oxygen. It also promotes water circulation throughout the water column, as it creates a rising current.

Bubble Tubing® has an excellent Standard Oxygen Transfer Efficiency (SOTE) and a great Standard Aeration Efficiency (SAE).

In 2011 we tested the oxygen transfer capabilities of Bubble Tubing® through an independent firm, GSEE Inc of Laverne, Tennessee. The tests were carried out on the ½”, ¾” Bubble tubing® and the OctoAir-10 industrial diffuser. In the summer of 2017 we gave GSEE Inc. another mandate to test the Bubble Tubing® at higher airflows and deeper depths, while also carrying out testing on our 1” Bubble tubing® and OctoAir-60 industrial diffuser.

“Overall, the results obtained for the Products Ltd. aeration systems were uniformly excellent and produced some of the highest SOTE values GSEE Inc. has observed.”
Gerald L.Shell GSEE Environmental Consultants, LaVergne, TN, Sept.2011

Link to Bubble Tubing® product page on





The Ministère des Transports uses Bio-Purge 1-2 times per year to clean the Bubble Tubing®. This treatment removes any biofilm that may have accumulated in the diffuser and thus ensures that it remains fully functional and releases the right quantity of oxygen into the water for an efficient treatment. You can find Bio-Purge in our online store : here.

In Conclusion

In the summer of 2021, we received a report the firm mandated by the Ministère des Transports to maintain the wastewater and drinking water treatment systems at rest areas in the municipality of Saint-Philippe-de-Néri. This report clearly demonstrates that the aeration system works by showing effluent analyzes meeting standards such as BOD5C and dissolved oxygen in water.

This report also shows high effluent releases of suspended solids (SS) and ammoniacal nitrogen (NH4). These releases are within the norm, but could be reduced by the addition of beneficial bacteria. We recommends the use of 2 products: Bacterius® N to reduce ammoniacal nitrogen by nitrification (link to the online store) and Bacterius® WW which will act on the reduction of organic matter (link to the online store). These items are particularly effective when combined with the aeration that is already present in the installation. According to the construction specification for the project, the residence time is 15 days, which is sufficient for bacteria to have a positive effect on nitrification and the treatment of organic materials.

Do you have an aeration project in progress? Contact us, it will be our pleasure to help you in the development of your project.


Bubble Tubing® is a trademark owned by Products Limited.