Which component is specifically used for removing carbon dioxide from a recirculating system?

The foam fractionator is specifically designed to remove carbon dioxide, along with other dissolved organic compounds, from a recirculating aquaculture system. It operates on the principle of protein skimming, which utilizes bubbles generated in the water column. As these bubbles rise through the water, they capture dissolved organic substances, including carbon dioxide, on their surfaces. This process effectively separates these substances from the water, thus facilitating the removal of carbon dioxide from the system.

In contrast, the packed column aerator is primarily used to introduce oxygen into water, enhancing aeration rather than removing carbon dioxide. The bead filter is a type of mechanical filtration that primarily targets particulate matter, while the fluidized sand filter is utilized for biological filtration and does not directly address carbon dioxide removal.