6 organism types
Protozoa
Microorganisms that feed on bacteria and help indicate the overall biological activity and health of the process.
Open protozoaActivated sludge microscopy
Microorganisms Gallery
A curated library of microscopy images from activated sludge systems, organized by organism type to support identification and process diagnosis.
24 organisms · 4 groups
Browse by group
Open a group to see its organisms, or go straight to one below.
8 organism types
Filaments
Filamentous bacteria that affect floc structure and can indicate process conditions such as loading, oxygen levels, and sludge age.
Open filaments
5 organism types
Metazoa
Higher organisms that appear in more developed sludge and generally indicate longer sludge age and stable conditions.
Open metazoa
5 organism types
Other Organisms
Additional microorganisms and particles that provide supporting information about process conditions.
Open other organismsMaji newsletter
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