Secondary hospital wastewater detoxification and disinfection by advanced oxidation processes.
Secondary hospital wastewater treatment was investigated as an alternative to detoxification and disinfection after anaerobic digestion in a hospital located in southern Brazil. Tertiary and secondary effluents were assessed by general parameters. The use of advanced oxidation processes (UV/O3 and UV/TiO2/O3) showed potential capacity for disinfection and detoxification of wastewater effluents. The UV/TiO2/O3 method yielded the best results, decreasing toxicity of EC50 = 65 to nontoxic levels, also reducing MPN/100ml of 1.1 x 10(6) to values less than 2 and increasing wastewater biodegradability. The low energetic consumption of the proposed UV/TiO2/O3 method can be considered operationally advantageous.
Machado
E L
EL
Department of Chemistry and Physics, Universidade de Santa Cruz do Sul--UNISC, Avenida Independência, 2.293,CEP 96815-900 Santa Cruz do Sul, RS, Brazil.
Kist
L T
LT
Schmidt
R
R
Hoeltz
J M
JM
Dalberto
D
D
Alcayaga
E L A
EL
D001938:Brazil; D002384:Catalysis; D006761:Hospitals; D007220:Industrial Waste; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D014466:Ultraviolet Rays
D007220:Industrial Waste; C009495:titanium dioxide; D010126:Ozone; D014025:Titanium