Parametric Study on the Treatment of Distillery Slop by Heterogeneous Fenton Process using Pyrite
Author : Reyes, Roxane Jane Soleta
Major Adviser : Capunitan, Jewel A.
Committee Members : Migo-Sumagang, Maria Victoria P.; Doliente, Stephen S.
Year : 2017
Month : December
Type : Thesis
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Distillery slop was treated using pyrite-catalyzed heterogeneous Fenton process in order to determine the effect of three factors such as initial pH of the sample (pH 3 and 6), pyrite dosage (5 and 10 g/L), and H₂O₂ concentration (0.39 and 0.78 M) and their interactions on the decolorization and COD reduction of the effluent. Two-level factorial design in duplicate with four center points was employed to determine the significant factors. Results showed that all factors were significant for decolorization and COD reduction. Moreover, the significant interactions were initial pH- H2O2 concentration for decolorization while pyrite dosage- H₂O₂ concentration and initial pH- pyrite dosage- H₂O₂ concentration for COD reduction. Both responses were higher at pH 6 compared to pH 3. Increasing H₂O₂ concentration resulted in an increase in decolorization but a decrease in COD reduction. On the other hand, increasing pyrite dosage resulted in a decrease in decolorization while its effect on COD reduction varied with H₂O₂ concentration. The treatment of distillery slop using heterogeneous Fenton process achieved an average of 91.91% decolorization at pH 6, 5 g/L pyrite and 0.78 M H₂O₂ while 72.38% COD reduction at pH 6, 10 g/L pyrite and 0.39 M H₂O₂. Although the final pH, color and COD of the treated wastewater did not comply with the DAO standards for Class C water bodies, the process was still able to reduce the high COD level and color of the slop. Therefore, the process could serve as a secondary or tertiary treatment for the slop.
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