Physico-chemical, microbiological and ecotoxicological evaluation of a septic tank/Fenton reaction combination for the treatment of hospital wastewaters.
作者： Josiani Berto , Gisele Canan Rochenbach , Marco Antonio B. Barreiros , Albertina X.R. Corrêa , Sandra Peluso-Silva
DOI: 10.1016/J.ECOENV.2008.12.002
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摘要: Abstract Hospital wastewater is considered a complex mixture populated with pathogenic microorganisms. The genetic constitution of these microorganisms can be changed through the direct and indirect effects hospital constituents, leading to appearance antibiotic multi-resistant bacteria. To avoid environmental contamination wastewaters must treated. objective this study was evaluate efficiency treated by combined process biological degradation (septic tank) Fenton reaction. Thus, after septic tank biodegradation, batch reaction experiments were performed in laboratory-scale reactor effectiveness sequential treatment evaluated physico-chemical/microbiological time-course analysis COD, BOD 5 , thermotolerant total coliforms. results showed that 120 min COD values decreased 90.6% 91.0%, respectively. /COD ratio from 0.46 0.48 treatment. Bacterial removal reached 100%, while biotests carried out Scenedesmus subspicatus Daphnia magna significant decrease ecotoxicity use system would ensure neither bacteria nor ecotoxic substances are released environment discharge.
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