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Appl Environ Microbiol. 1968 August; 16(8): 1191-1199
Copyright © 1968 American Society for Microbiology. All Rights Reserved.

Attached Growth of Sphaerotilus and Mixed Populations in a Continuous-flow Apparatus¹

Department of Environmental Sciences, Rutgers, The State University, New Brunswick, New Jersey 08903

ABSTRACT

The effects of NH₄Cl concentration, organic nitrogen compounds, glucose concentration, dissolved oxygen concentration, and flow rate on the attached growth of pure cultures of Sphaerotilus natans and of a mixed population in a continuous-flow apparatus are described. Low concentrations of NH₄Cl and oxygen, and high flow rates resulted in attached populations that were dominated by Sphaerotilus. The conditions that allowed maximal attached growth in pure culture did not correspond to the conditions that promoted attached growth of Sphaerotilus in a mixed population.

² Present address: Anil Starch Products, Ahmedabad, India 2.

³ Present address: Department of Food Science, Cornell University, Ithaca, N.Y. 14850.

¹ Paper of the Journal Series, New Jersey Agricultural Experiment Station, Rutgers, The State University, New Brunswick, N.J.