Amoebae are single cellular protozoa that move via pseudopodia, engulfing organics and bacteria cells. They are common in "young sludge" conditions, but testate (shelled) amoeba are also common in older sludges. The big issue I have with using amoeba as indicator organisms is that many operators only look for the typical amoeba view (below)
However, this is not the only way amoeba appear under the microscope. They also frequently look like this:
Erik Rumbaugh has been involved in biological waste treatment for over 20 years. He has worked with industrial and municipal wastewater facilities to ensure optimal performance of their treatment systems. He is a founder of Aster Bio (www.asterbio.com) specializing in biological waste treatment.
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