期刊
WATER RESEARCH
卷 45, 期 17, 页码 5523-5528出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2011.08.008
关键词
Disinfection; Gamma radiation; Wastewater; Inactivation; Eggs Ascaris lumbricoides; Viability
资金
- Centro de Tecnologia de Desenvolvimento Nuclear - CDTN
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico - CNPq
- Financiadora de Estudos e Projetos - FINEP (PROSAB)
- Fundacao de Amparo a Pesquisa de Minas Gerais - FAPEMIG [14.107]
- Instituto de Analises Clinicas Hermes Pardini
- Pro-Reitoria de Pesquisa da Universidade Federal de Minas Gerais - UFMG
- Universidade Federal de Minas Gerais (Department of Parasitology and Department of Sanitary and Environmental Engineering)
This work investigated the inactivation of Ascaris lumbricoides eggs in domestic effluents by gamma radiation from a Co-60 source. Domestic wastewater was treated in a compact demo-scale system consisting of a UASB reactor and a trickling filter; treatment was carried out at the Center for Research and Training on Sanitation (CePTS), Federal University of Minas Gerais, in Belo Horizonte-MG, Brazil. One-liter of treated wastewater samples was artificially contaminated with an average of 1000 non-embryonated Ascaris lumbricoides eggs from human feces; samples were then irradiated in a multiple-purpose irradiator at different doses (0.5-5 kGy). Eggs were recovered from the wastewater and the viability of these irradiated eggs was evaluated; the description of the egg developmental phases with each dose of gamma radiation was recorded. Radiation doses of 3.5 kGy effectively disinfected effluents with lower concentrations of A. lumbricoides eggs; higher radiation doses of 5 kGy were necessary to disinfect effluents with higher eggs concentrations. (C) 2011 Elsevier Ltd. All rights reserved.
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