Nocardia is a very distinctive organisms in wastewater. Nocardia has true branching and stains gram positive. The photo above is a gram stained Nocardia filament from recent sample. While a filament, Nocardia forms do not cause bulking. The problem with Nocardia is the foaming caused by their production of hydrophobic extracellular polymeric substances (EPS). The foam is thick, resistant to anti-foams, and is very stable.
What causes Nocardia overgrowth?
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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