, Volume 83, Issue 2, pp 207–215 | Cite as

The structure of Ciliated Protozoa communities in biological sewage-treatment plants

  • Paolo Madoni
  • Pier Francesco Ghetti


Samples of mixed-liquor from 39 activated-sludge plants and of biological film from 49 rotating discs were examined microscopically for the presence of Ciliated Protozoa. 45 and 47 species of Ciliates were identified in activated-sludge plants and rotating discs, respectively.

Most of the ciliate species, which are frequent inhabitants of activated-sludge, were found also in rotating discs. Statistical analysis based on affinity index and on recurrent groups, made it possible to reconstruct the structure in species of ciliate communities both in activated-sludge plants and in rotating discs.


Ciliated Protozoa structure of the communities biological sewage-treatment plants 


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Copyright information

© Dr W. Junk Publishers 1981

Authors and Affiliations

  • Paolo Madoni
    • 1
  • Pier Francesco Ghetti
    • 1
  1. 1.Istituto di EcologiaUniversità di ParmaParmaItaly

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