Wastewater treatment performance in microbiological removal and (oo)cyst viability assessed comparatively to
Raphael Corrêa Medeiros1, Kamila Jessie Sammarro Silva2, Luiz Antonio Daniel2
1Department of Engineering and Environmental Technology, Federal University of Santa Maria - campus Frederico Westphalen, Rio Grande do Sul, Brazil.
Abstract:
Municipal wastewater is a source of pathogenic protozoan (oo)cysts and may play a significant role in spreading waterborne diseases. This scenario becomes more critical as treated sewage from municipal wastewater treatment plants (WWTP) is discharged into springs, which are often used for water supply, irrigation, recreation and, further downstream, indirect potable reuse, quite common in Brazil. This study aimed to elucidate, regarding microbiological quality, the performance of a full-scale WWTP, consisting of preliminary treatment, upflow anaerobic sludge blanket (UASB) reactor, activated sludge system and ultraviolet (UV) radiation disinfection. Pathogenic protozoa (Giardia spp. cysts and Cryptosporidium spp. oocysts), as well as microbiological indicators (Escherichia coli and Clostridium perfringens), were evaluated in terms of their removal. In addition, (oo)cyst viability and fluorescence reduction were assessed. By using the data obtained from this research, the prevalence of infection estimated for the population served by the WWTP was between 7.4% and 14.8% for giardiasis, and between 0.055% and 0.11% for cryptosporidiosis.
More Related Videos
07:23Fluorescence Microscopy Methods for Determining the Viability of Bacteria in Association with Mammalian Cells
Published on: September 5, 2013
09:49Use of a Battery of Chemical and Ecotoxicological Methods for the Assessment of the Efficacy of Wastewater Treatment Processes to Remove Estrogenic Potency
Published on: September 11, 2016
Related Concept Videos
Methods to Assess Microbial Populations
Microbial Wastewater Treatment
Biological Treatment of Effluent and Waste Water
