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ABSTRACT
This study is based on the investigation of performance of associated wastewater treatments of coagulation-flocculation/adsorption (CF-ADS) and coagulation-flocculation/ozonation (CF-OZ) for the removal of pollutants from tannery wastewater. The chemical dosage was optimized and the use of waste from the tannery process was tested as a low-cost alternative adsorbent for wastewater treatment plants. For the CF-ADS the removal of TOC, COD, Na+ and color were 50.04%, 53.13%, 17.05% and 61.13%, respectively, and for the CF-OZ the removal were 46.50%, 56.25%, 11.10% and 85.34%. Also, BOD/COD and COD/TOC ratios were studied to verify the oxidation efficiency of the wastewater.
Acknowledgments
We are grateful to Tannery Fridolino Ritter Ltda for the samples of cattle hair waste.
Funding
We would like to express thanks for the scholarships provided by Brazilian Federal Agency for the Scholarship (CAPES) and to Financier of Studies and Projects (FINEP) – public call MCTI/FINEP CT-HIDRO 01/2013.