doi: 10.7763/IJESD.2012.V3.275
Advanced Oxidation of ECF Bleaching Wastewater Using TiO2 Photocatalysis
Parveen Kumar
,
Satish Kumar ,
Nishi Kant Bhardwaj
- DPT, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur - 247001, U.P., India
Abstract
Advanced oxidation of ECF (elemental chlorine free) bleaching wastewater (D1 and E stage of DED and ODED sequences) using TiO<sub>2</sub> photocatalysis has been investigated for environmental load reduction. The wastewaters were generated in the laboratory by chlorine dioxide (D) bleaching and alkaline extraction (E) of the mixed hardwood kraft pulp under controlled conditions. The bleaching wastewaters were subjected to photocatalytic oxidation under UV radiation with 0.5 g/L of TiO2 at a pH 7.0 for 4 h in a slurry-type reactor. Higher removal efficiencies have been observed for ODED sequence wastewaters as compared with DED sequence. UV/TiO2 oxidation removed 46.3% BOD (biochemical oxygen demand), 64.2% COD (chemical oxygen demand), 88.3% color, and 59.3% AOX (adsorbable organic halides) for D1 and 55% BOD, 66.5% COD, 86.7% color, and 64.2% AOX for E stage wastewaters of ODED sequence. Higher improvement in BOD/COD ratio has been observed for ODED sequence wastewaters as compared with DED. This shows that wastewaters from ODED sequence are more amenable to photocatalytic degradation.
Keywords
- Advanced oxidation
- AOX
- biodegradability
- TiO 2 photocatalysis
How to Cite
Parveen Kumar, Satish Kumar, and Nishi Kant Bhardwaj, "Advanced Oxidation of ECF Bleaching Wastewater Using TiO2 Photocatalysis," International Journal of Environmental Science and Development, vol. 3, no. 5, pp. 501-506, 2012. https://doi.org/10.7763/IJESD.2012.V3.275
Copyright & License
Copyright © 2012 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).