What organism would most likely enhance the penetration of oxygen into the activated sludge?

The organism that would most likely enhance the penetration of oxygen into the activated sludge is the flagellate. Flagellates are motile microorganisms that can actively propel themselves through the water using tail-like structures called flagella. This movement helps to agitate the surrounding water, creating shear forces that can increase the mixing within the activated sludge. As a result, they promote better oxygen transfer by increasing the surface area for gas exchange and improving the overall aeration process.

In an activated sludge system, the introduction of organisms like flagellates is beneficial because they assist in oxygen uptake by enhancing the movement of water, which helps to distribute the dissolved oxygen more effectively throughout the sludge. This is vital for the survival of aerobic bacteria, which rely on oxygen to break down organic materials in the wastewater.

Ciliates, amoebas, and rotifers may also play roles in the activated sludge system, but their primary functions differ. Ciliates primarily function as grazers, feeding on bacteria and particulates rather than actively enhancing oxygen transfer. Amoebas, often considered opportunistic feeders, contribute to microbial diversity in the sludge but do not significantly impact oxygen penetration. Rotifers, while important in some aquatic ecosystems, have less direct involvement in the oxygen dynamics of