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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Behavior of Metals, Pathogen Parasites, and Indicator Bacteria in Sewage Effluents During Biological Treatment by Activated Sludge

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Author(s):
Tonani, K. A. A. [1] ; Juliao, F. C. [1] ; Trevilato, T. M. B. [2] ; Takayanagui, A. M. M. [3] ; Bocio, Ana [4] ; Domingo, Jose L. [4] ; Segura-Munoz, Susana I. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Lab Ecotoxicol & Environm Parasitol, Maternal Infant Nursing & Publ Hlth Dept, Ribeirao Preto Coll Nursing, BR-14040902 Sao Paulo - Brazil
[2] Univ Sao Paulo, Pediat Lab, Div Met, Univ Hosp Sch Med, BR-14040902 Sao Paulo - Brazil
[3] Univ Sao Paulo, Environm Hlth Lab, Maternal Infant Nursing & Publ Hlth Dept, Ribeirao Preto Coll Nursing, BR-14040902 Sao Paulo - Brazil
[4] Univ Rovira & Virgili, Lab Toxicol & Environm Hlth, Sch Med, IISPV, E-43201 Reus, Catalonia - Spain
Total Affiliations: 4
Document type: Journal article
Source: BIOLOGICAL TRACE ELEMENT RESEARCH; v. 143, n. 2, p. 1193-1201, NOV 2011.
Web of Science Citations: 10
Abstract

The purpose of this study was to evaluate the behavior of metals, pathogen parasites, and indicator bacteria in sewage effluents during biological treatment by activated sludge in a wastewater treatment plant in Ribeiro Preto (WTP-RP), Sao Paulo, Brazil. The evaluation was done during a period of 1 year. Results showed that metal concentrations in treated effluents decreased, reaching concentrations according to those established by national regulations. The activated sludge process at the WTP-RP promoted a partial removal of parasites considered as possible indicators according to the WHO guidelines. Reduction factors varied between 18.2% and 100% for agents such as Endolimax nana, Entamoeba coli, Entamoeba hystolitica, Giardia sp., Ancylostoma sp., Ascaris sp., Fasciola hepatica, and Strongyloides stercoralis. A removal was also observed in total and fecal coliforms quantification. The present study represents an initial evaluation of the chemical and microbiological removal capacity of the WTP-RP. The results should be of interest for the authorities responsible for the environmental health at municipal, regional, national, and international levels. (AU)