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Role and function of protozoa in the biological treatment of polluted waters

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Immobilized Biocatalysts Saccharomyces Yeasts Wastewater Treament

Part of the book series: Advances in Biochemical Engineering/Biotechnology ((ABE,volume 29))

Abstract

The activated sludge used in the biological treatment of polluted water is a typical ecosystem composed of bacteria and protozoa. There should be an indigenous picture of competition, predation, mutualism and so forth, among the microorganisms which contribute to the removal of organic matters from polluted waters.

Specific protozoa have been detected in the sludge when the process proceeds satisfactorily. Therefore, a study how to control the protozoan fauna in the sludge to warrant a good quality of effluent is essential.

This article presents a clue leading to the microbiological control of the biotic community in the sludge, through the studies on ecological characteristics in the monoxenic culture of ciliated protozoa isolated from the activated sludge.

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Abbreviations

C:

empirical constant

D h−1 or d −1 :

dilution rate

F:

function of S and X

G:

function of P and X

k1, k2 :

rate constants

K mg l−1 :

saturation constant for bacteria

Kx mg l−1 :

saturation constant for protozoa

P mg l−1 :

protozoan mass concentration

S mg l−1 :

substrate concentration

S0 mg l−1 :

substrate concentration in fresh medium

t h:

time

td h:

doubling time

W:

yield factor of protozoan growth defined by δP/(−δX)

X mg l−1 :

bacterial cell mass concentration

Y:

yield factor of bacterial growth defined by δX/(−δS)

Μ h−1 :

specific growth rate

Μm h−1 :

maximum value of Μ

Μp h−1 :

specific growth rate of protozoa

Μp, max h−1 :

maximum value of Îœp

Φ:

YWS+WX+P

∼:

singular point (superscript)

References

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Authors and Affiliations

  1. Laboratory of Freshwater Environment, National Institute for Environmental Studies, P. O. Tsukuba-Gakuen, Tsukuba, 305, Ibaraki, Japan

    Ryuichi Sudo

  2. Department of Fermentation Technology, Faculty of Engineering, Osaka University, Yamada-oka, Suita-shi, 565, Osaka, Japan

    Shuichi Aiba

Authors
  1. Ryuichi Sudo
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  2. Shuichi Aiba
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© 1984 Springer-Verlag

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Sudo, R., Aiba, S. (1984). Role and function of protozoa in the biological treatment of polluted waters. In: Immobilized Biocatalysts Saccharomyces Yeasts Wastewater Treament. Advances in Biochemical Engineering/Biotechnology, vol 29. Springer, Berlin, Heidelberg. https://doi.org/10.1007/Bfb0000692

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  • DOI: https://doi.org/10.1007/Bfb0000692

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-12860-1

  • Online ISBN: 978-3-540-38752-7

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