Electrooxidation Combined with Ozonation in Hospital Laundry Effluents Treatment
作者： Carlos Alexandre Lutterbeck , Rômulo de Oliveira Schwaickhardt , Alexandre Straatmann , Lourdes Teresinha Kist , Eduardo A. Lobo
关键词: Composite sample 、 Pulp and paper industry 、 Effluent 、 Chemical oxygen demand 、 Biochemical oxygen demand 、 Laundry 、 Waste management 、 Toxicity 、 Chemistry
摘要: In the present study, treatment tests were performed on effluents generated from a hospital laundry using electrooxidation (EO) processes. Global parameter analyses and toxicological conducted before after each trial. The analytical characterization of effluent fractions revealed variable toxicities ranging slightly toxic for composite sample extremely Wash stage. Another related to refractoriness at different currents involved measuring chemical oxygen demand/biochemical demand (COD/BOD5) ratio, maximum ratio 34.72 was observed in wash Ozonation, EO processes with iron electrodes alone, combined ozonation (EO/O3 EO + O3) used tests. involving process 60 min induced conductivity through addition NaCl exhibited best performance. Considering performance previous assays, only electrochemical methods evaluated analyses. application three-electrochemical provided detoxification levels that improved moderately or toxic. one conditions, initial rinse linens condition (12.58%) (61.59%), while COD decreased by 9%. With respect coming step, showed 41% reduction, toxicity reduced considerably (6.89%) (76.65%).
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