Changes in the Structure of Activated Sludge Protozoa Community at the Different Oxygen Condition / Zmiany W Strukturze Zbiorowiska Pierwotniaków Osadu Czynnego W Zróżnicowanych Warunkach Tlenowych

Roman Babko 1 , Tatyana Kuzmina 2 , Grzegorz Łagód 3  and Katarzyna Jaromin-Gleń 4
  • 1 I.I. Schmalhausen Institute of Zoology NAS of Ukraine, B. Khmelnitsky 15, Kiev, 01601, Ukraine
  • 2 Sumy State University, Ukraine, Rimsky-Korsakov 2, Sumy, 40007, Ukraine
  • 3 Faculty of Environmental Engineering, Lublin University of Technology, ul. Nadbystrzycka 40B, 20-618 Lublin, Poland
  • 4 Institute of Agrophysics, Polish Academy of Sciences, ul. Doświadczalna 4, 20-290 Lublin, Poland

Abstract

Several experiments were performed in the laboratory condition using an SBR bioreactor modelling the expected conditions, created by malfunction of certain bioreactor elements, thus the different oxygen condition. In the course of the experiments, the concentrations of ammonia nitrogen, nitrates(III), nitrates(V), TOC, and TC were systematically measured. Besides physico-chemical parameters, the structure of activated sludge community was analyzed. In the samples, the number and species composition of protozoa (ciliates) were determined. Each of the three measuring series conducted for various types of process conditions was repeated three times. The activated sludge used for inoculation of the bioreactor was sampled at Hajdow WWTP in Lublin. The results obtained are the average of three repetitions of every experimental series. On this ground, we may conclude that the number of ciliates shows a high correlation with the O2 concentration, pH and TOC.

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