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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.)

Inactivation of bacteria and helminth in wastewater treatment plant effluent using oxidation processes

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Author(s):
Guadagnini, Regiane Aparecida [1] ; dos Santos, Luciana Urbano [1] ; Bueno Franco, Regina Maura [2] ; Guimaraes, Jose Roberto [1]
Total Authors: 4
Affiliation:
[1] Univ Campinas UNICAMP, Lab Oxidat Proc, Dept Sanitat & Environm, Campinas, SP - Brazil
[2] Univ Campinas UNICAMP, Lab Protozool, Dept Anim Biol, Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: WATER SCIENCE AND TECHNOLOGY; v. 68, n. 8, p. 1825-1829, 2013.
Web of Science Citations: 5
Abstract

The contamination of bodies of water by raw and even treated sewage is worrying because pathogens that affect public health and the environment are not fully eliminated in wastewater treatment systems. The disinfection step is an important barrier to adopt to reduce this contamination. However, widely used disinfectants such as chlorine do not guarantee the inactivation of resistant organisms such as spore-forming bacteria and helminth eggs. This study evaluated the effectiveness of processes of peroxidation (H2O2), ultraviolet radiation (UV) and peroxidation assisted by ultraviolet radiation (H2O2/UV) in terms of reduction and inactivation of total coliform bacteria, Escherichia coli, helminth eggs and larvae present in a treated sewage. Doses of UV radiation of 70 mJ cm(-2) and hydrogen peroxide concentration of 30 mg L-1 were used. The number of bacteria reduced after UV and H2O2/UV processes was 3 and 4 log, respectively. An average reduction of 59% in the number of eggs was verified when using H2O2, UV, and H2O2/UV processes. Helminth larvae were reduced by 24% after H2O2 and UV; the process H2O2/UV did not reduce the number of larvae. Statistically significant differences between the processes for both organisms were not observed. (AU)

FAPESP's process: 10/15550-8 - Advanced Oxidative Process for the disinfection of treated wastewater: helminths, protozoa and bacteria
Grantee:Regiane Aparecida Guadagnini
Support Opportunities: Scholarships in Brazil - Doctorate