Disinfection of domestic effluents by gamma radiation: Effects on the inactivation of Ascaris lumbricoides eggs

作者：de Souza Gloria S M B; Rodrigues Ludmila A; de Oliveira Warllem J; Chernicharo Carlos A L^*; Guimaraes Marcos P; Massara Cristiano L; Grossi Pablo A

来源：Water Research, 2011, 45(17): 5523-5528.

DOI：10.1016/j.watres.2011.08.008

• Disinfection
• Gamma radiation
• Wastewater
• Inactivation
• Eggs Ascaris lumbricoides
• Viability

This work investigated the inactivation of Ascaris lumbricoides eggs in domestic effluents by gamma radiation from a (60)Co 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.

• 出版日期2011-11-1