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Mystery Bug of the Month

September-07

Stalked Ciliates. . . . . Indications that you have a nice medium sludge age

This particular stalk is an Epistylis and belongs to the Phyllum Ciliophora. They can range from 200-250 um long. Some of the colonies can reach up to 2mm long.

This is a stalked ciliate that looks similar to Vorticella or Carchesium. This stalk does not have a myoneme though, which looks like a spring or allows them to contract like some of the others.
If you see this in your slide under the microscope, it means you probably are running a pretty good sludge age and are close to meeting BOD permit levels.

These photomicrographs were taken from a wastewater sample. Most of the objectives used were 100 and 400x.

Come take a closer look at the amazing world under the microscope!

At very low power, 40x you can still pick out the stalks	1000x base of the stalk

	Here you can see the stalk trying to eat some of the bacteria off the floc
	where two are joined at a branch in the stalk











	400x even at this magnification they are still very large


here is a rotifer above the stalk on the right






	100x very large, bigger than the floc

Heavy attached growth on the stalks means the system has been quite stable for a while, long enough for the stalks to stay in the system and build up attached growth Typically a good sign



Phyllum Ciliophora Epistylis plicatilis or Epistylis chrysemydis, more likely the Epistylis chrysemidis, since it is typically larger	Taxonomy (ITIS) Kingdom Animalia Phylum Ciliophora Class Ciliatea Subclass Peritricha Order Peritrichida Suborder Sessilina Family Epistylidae Genus Epistylis Scientific classification Domain: Eukaryota (unranked) Alveolata Phylum: Ciliophora Class: Oligohymenophorea Subclass: Peritrichia Stein 1859

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Stay tuned each month

More to come soon!

Enlargements: If you liked these pictures and want to see additional microorganisms check out the pages below.

Amoeba

Flagellates

Free Swimming Ciliates

Eating under the microscope- Dinner time!

What if you do not have a lab or microscope onsite that is capable of performing an analyses of your system?

Find out how Environmental Leverage's lab can perform an analyses of your biomass in your system and make recommendation on how to improve your system.

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