Aerated Lagoons in Wastewater Treatment

  • Reduce emission fees per volume
  • Prevent penalty fees from exceeding emission limits
  • Get rid of the bad smell

Yes to Aeration, No to Bad Odour

Water is the universal solvent, mass transfer media, coolant, and raw material for industrial processes. Inevitably, the use of water also means liquid emissions, which in numerous industrial sites is manifested by wastewater ponds and basins.

Aerated lagoons are simple wastewater treatment processes. Lagoons  are usually large, relatively shallow basins with long residence times. This means the process water is pumped into the lagoon and left there for biological wastewater treatment. Lagoons can be completely mixed or facultative type where only the surface layer is aerated and mixed.

Why is aeration a good idea?

One of the main objectives of lagoons is to provide time for biological wastewater treatment. Biological treatment requires oxygen, which means you have to somehow introduce additional oxygen to the water. Usually, the diffusion of atmospheric oxygen together with photosynthesis is not enough to provide oxygen for other than very low-load wastewaters. Thus, efficient aeration is required to achieve emission limits and effluent quality targets.

Aeration is widely used in water treatment and conditioning in different industries:

  • Pulp and paper
  • Chemical industries
  • Food and beverages
  • Mining applications
  • Landfill sites
  • Fish farming
Aerator transfers oxygen into wastewater and then disperses and effectively mixes the oxygen-enriched water in the basin.

Eliminate Bad Odour

Standing water can result in oxygen depletion. In other words, there’s less and less oxygen in the water and more and more bad odour coming out from lagoons, ponds or basins. Less oxygen in the water also means bad water quality which might result in penalty fees from exceeding emission limits.

How to improve the water quality? The reason for the foul smell of industrial lagoons and basins often lies in poor or negligible aeration that results in anaerobic processes. By simply introducing more oxygen to the water, you can solve two problems at once:

Example of how introducing oxygen to anaerobic ponds improves water quality. 

Get rid of the bad smell

Prevent penalty fees from exceeding emission limits

Improve water quality

Lower wastewater fees

Reduce Costs

How to introduce more oxygen to lagoons, ponds and basins? Roxia Plasma Oy has an aeration solution that is highly efficient and has a low initial investment: Roxia Floating Aerator. Adding oxygen to the water helps reduce the bad smell, improve water quality and thus reduce wastewater costs!

Floating Aerator: Convenient Aeration Solution

The aerators are easy to retrofit to existing lagoons and basins. After start-up, they immediately start improving the quality of the water. We offer a wide range of floating aerators for ponds and basins with different dimensions and oxygen requirements.

  • Low-cost solution
  • Convenient and light setup (requires only mooring & electrical supply)
  • No need to empty the lagoon for the installation

Standing water can result in oxygen depletion and problems with water quality. A foul smell of industrial basins is often attributable to poor or negligible aeration and resulting anaerobic processes.

The best solution for your process?

We expand this database with continuous testing. To find the best solutions for your process, we also offer trials for waters with challenging organic contaminants. If you are interested in a trial, contact our Environmental Technologies experts.

Contact us

If you have something on your mind, just let us know! We are more than happy to answer all your inquiries.


Lyle Henson

Sales Manager North America

+1 443 695 9510

Pyry Kupias

Technical Product Manager

+358 40 721 8919

Maija Mehto

Technical Account Manager

+358 50 534 3211