The Competitive Growth of Zoogloea ramigera and Type 021N in Activated Sludge and Pure Culture: A Model for Low F:M Bulking

This paper presents experimental results that explain why filamentous organisms such as Type 021N are selected in completely-mixed low F:M systems and the mechanism by which selectors function to prevent filamentous organism growth and bulking at low F:M. The experiments include both activated sludg...

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Bibliographic Details
Published in:	Journal - Water Pollution Control Federation 1987-05, Vol.59 (5), p.262-273
Main Authors:	van Niekerk, André M., Jenkins, David, Richard, Michael G.
Format:	Article
Language:	eng
Subjects:	Acetates Activated sludge Aeration Applied sciences Bacteria Biological and medical sciences Biological treatment of waters Biotechnology Chemical oxygen demand Economic growth rate Environment and pollution Exact sciences and technology Fundamental and applied biological sciences. Psychology General purification processes Industrial applications and implications. Economical aspects Oxygen Pollution Process Research Respiration Sludge Wastewater Wastewaters Water treatment and pollution
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Summary:	This paper presents experimental results that explain why filamentous organisms such as Type 021N are selected in completely-mixed low F:M systems and the mechanism by which selectors function to prevent filamentous organism growth and bulking at low F:M. The experiments include both activated sludge studies and pure culture work on a representative floc-forming bacterium (Zoogloea ramigera) and a filamentous bacterium (Type 021N) that can cause bulking at low F:M.
ISSN:	0043-1303 2327-7467