What are the microbes of activated sludge?

Microorganisms such as bacteria, protozoic animals and fungi gather and inhabit.

Among the activated sludge microorganisms, bacteria are the most contributing to sewage purification.
Bacteria create activated sludge flocs (aggregation of bacteria) by taking out substances that gather together and stick together outside the cells. There are many types of bacteria that make flocs, such as Zoogloea, Bucillus, pseudomonas, and Flavobacterium.

Protozoa are microorganisms that can be seen in activated sludge with a microscope about 100 times larger in activated sludge.
Compared to bacteria, sewage treatment is a supporting role in sewage treatment, and eating flocs to reduce its amount to make it easier to sink, or eat floating bacteria to clean the treated water. Ciliary cilias (Vorticella), Epistiris (Epistylis), Aspidisca (Aspidisca), Litonotus (Arcella), Ameba (Amoeba), Flexca (Amoeba), and many (Amoeba), Flexible insects Entosiphon (Entosiphon), many.

The shape of multicellular organisms can be seen in about 100 times. There are worms, weed beetles, aphids, aphid worm, nematode, etc.

It is rare for fungi to appear in activated sludge. The mold called Zoofergas catches and eats worms.