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Congresso Brasileiro de Microbiologia 2023
 		Resumo: 963-1

963-1

ANALYSIS OF THE MICROBIOLOGICAL QUALITY OF WATER FROM THE URUGUAY RIVER IN THE CITY OF URUGUAIANA (RS)

Autores:
Fernanda Riffel (UNIPAMPA - Universidade Federal do Pampa) ; Tatiane Goulart de Lima (UNIPAMPA - Universidade Federal do Pampa) ; Taciane Maia Barbosa Martins (UNIPAMPA - Universidade Federal do Pampa) ; Darliane Andreis (UNIPAMPA - Universidade Federal do Pampa) ; Cheila Denise Ottonelli Stopligia (UNIPAMPA - Universidade Federal do Pampa)

Resumo:
The Uruguay River is one of the main rivers in the state of Rio Grande do Sul, with approximately 1,770km in length. The city of Uruguaiana is among the main municipalities in Rio Grande do Sul bathed by its waters, which are used in various agricultural, farming, fishing, leisure and domestic supply activities. Thus, this work aimed to analyze the microbiological quality of water in two different points of the Uruguay River, in the city of Uruguaiana, Rio Grande do Sul, characterized by an area with a predominance of waste from residential sewage and another area with a prevalence of waste from agriculture and livestock, between the months of March and July 2022. The samples were analyzed at the Microbiology Laboratory of the Federal University of Pampa, establishing the most probable number (MPN) per 100 milliliters of sample, using the multiple tube technique. The results obtained were correlated with the standards of microbiological quality of fresh water as described in Resolution Number 20 of 1986 of the National Council for the Environment. According to this study, all samples were positive for total coliforms. Regarding the classification, through the analysis of thermotolerant coliforms, none of the points belong to Special Class or Class I. The waters of the Uruguay River in points with a predominance of residential and agricultural sewage residues can be classified as Class II. However, the point referring to domestic sewage residues showed a higher concentration of microorganisms when compared to the area with a prevalence of residues from agricultural activities. The main source of contamination of the Uruguay River is directly related to human activities. The data established by this study constitute an important source of information for the population, which can serve as a basis for carrying out actions aimed at preserving the Uruguay River and for future comparative studies.

Palavras-chave:
  Uruguay River, Microbiological quality, Multiple tubes, Coliforms


Agência de fomento:
Microbiology Laboratory of the Federal University of Pampa