APPLICATION OF THE UV/TiO2 METHOD FOR TREATMENT OF EFFLUENT FOR MECHANICS MAINTENANCE LAUNDRY CONTEND PHENOLS

Abstract

The contamination of soil and groundwater by organic compounds has shown a potential pollutant concern. We started this work featuring a sample from a laundry, from post gasoline, towels used in mechanical maintenance and headboards of banks by bus. The characterization showed the need for treatment for the reduction of phenols. In recent years the oxidative processes developed has proved excellent for degradation by the generation of radical HO. strong oxidizer that allows the rapid and indiscriminate degradation of a variety of organic compounds with complete mineralization. Among the various alternatives chose working with photocatalytic heterogeneous, with the presence of TiO2 and UV radiation. In the process of treatment perfected the method with the use of a reactor type ramp supported with photocatalytic (TiO2). The results showed as the best method of treatment UV/TiO2 conjunction with degradation in 60 minutes of 81% for the synthetic sample and 13% for the effluent real. After treatment were made several tests for the identification and classification of microorganisms found in both raw and in the treated effluent in order to assess the effluent the microbiological level, and integrate the results of the effluent treatment done. Of the point of view of the toxicidade the treatment was efficient, therefore it diminished the amount of phenol, and it did not harm, in general, the development nor the growth of the microrganismos of the experiment.