Treatment of Paper and Pulp Mill Wastewater by Ozonation Combined with Electrolysis

Naoyuki KISHIMOTO, Takahiro NAKAGAWA, Hirokazu OKADA, Hiroshi MIZUTANI
2010 Journal of Water and Environment Technology  
Ozonation combined with electrolysis (ozone-electrolysis), ozonation alone and electrolysis alone were applied to the treatment of a paper and pulp mill wastewater for the decolorization and removal of chemical oxygen demand (COD). Electrolysis alone was ineffective in treating the paper and pulp mill wastewater. Both ozone-electrolysis and ozonation alone were effective in removing chromaticity, but produced white suspended solids. The production of the solid by ozone-electrolysis was smaller
more » ... han by ozonation alone. The ozone-electrolysis demonstrated more rapid removal of COD and higher ozone effectivity than the ozonation alone. Furthermore, ozone-electrolysis was the most useful method to transform organic compounds into more oxygenated ones of the three.
doi:10.2965/jwet.2010.99 fatcat:54joiwzbwnhpzgafbi7ksnkhhy