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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 2605

Henryk Klimowicz; Microfauna of activated sludge Part III. The effect of physico-chemical factors on the occurrence of microfauna in the annual cycle. Acta Hydrobiologica (Acta Hydrobiol.) 15(2):167-188, 1973

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The effect of physico-chemical and atmospheric conditions on the development of the microfauna in the annual cycle was determined. 69 species were identified. It was difficult to determine which fluctuations in the assemblage of the microfauna depended on the technological and which on the atmospheric conditions. The majority of species in the activated sludge appear accidentally in periods which are difficult to anticipate. The remaining species may be divided into frequently and rarely found in the course of the year, and into those characteristic for warm or cold seasons of the year. The rise in temperature from March to September caused a gradual increase in the number of individuals. The number of species and of the individuals representing them depends mainly on the course of the process of sewage purification and to a lesser degree on the season of the year.