Japanese Journal of Protozoology
Online ISSN : 2189-6747
Print ISSN : 0388-3752
ISSN-L : 0388-3752
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Volume 3, Issue 1
Displaying 1-3 of 3 articles from this issue
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Original
  • Studies on the protozoa-populations in activated sludge of sewage and waste treatment plants
    Isamu Morishita
    1970 Volume 3 Issue 1 Pages 1-13
    Published: 1970
    Released on J-STAGE: August 25, 2018
    DOIhttps://doi.org/10.18980/jjprotozool.3.1_1
    JOURNAL FREE ACCESS
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    The protozoa in samples of activated sludge were examined and results were as follows.

    1) In the activated sludge specimens investigated 187 species of 85 genera and 3 subphyla were identified. The predominant protozoa were Peritrichida of the Ciliophora. The Peritrichida found constituted 61 species of 7 genera and 2 families, the genus Vorticella being predominant.

    2) The Peritrichida appeared to be almost universally distributed but different genera and species were unique to different environments (water quality).

    3) Different raw water (sewage) systems, and the compositions of the activated sludge protozoa-populations in different activated sludges showed unique relationships with the species of Peritrichida.

    4) Based on the above results the Peritrichida could be used in indices of the nature of activated sludge, purity of sample and quality of water.

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