These are typically observed in a healthy sludge age.
Suctorians are indicators of a healthy sludge age, no treatment necessary. If you are concerned about your plant conditions contact a technical rep for information and recommendations.
If suctorians are observed in a wastewater plant it is typically indicative of a healthy activated sludge system. If attached growth is developing on the stalk of a suctorian it can act as a gauge for sludge age; the more attached growth the older the sludge. If suctorians are observed with their tentacles scrunched up, it is usually indicative of high levels of ammonia.
Suctorians are similar to stalked ciliates. Just like stalked ciliates, suctorians typically have an inverted bell-like shaped head, or zooid. However, instead of cilia extending from the head, suctorians have several hollow tentacles. Suctorians range from 30-200 µm in size and can be identified under 100x magnification.
Dovgal, I.V. (2002). Evolution, phylogeny and classification of suctorea (Ciliophora).Protistology,2(4),194-
271).
Novozymes. A guide to higher life forms in biological wastewater treatment systems. [PDF].
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