COD Removal of Textile Printing and Dyeing Wastewater by Photocatalysis

Abstract:

Degradation of printing and dyeing wastewater after aerobic biochemical treatment by photocatalysis is studied by using a rotating photoreactor and TiO₂ photocatalyst of Degussa P25. Effects of irradiation time and pH value on removing efficiency are investigated. The results show that the COD down to about 80mg/L can be achieved at the irradiation time of about 4-5 hours at mild pH values. At the pH value from 1.5 to 3.2, the COD down to about 80mg/L can be achieved at the irradiation time less than 1 hour, and the COD down to about 20mg/L could be achieved at the irradiation time of about 4 hours at a pH value of about 3.2.

• Periodical: Advanced Materials Research (Volume 704)
• Pages: 51-54
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.704.51
• Online since: June 2013
• Authors: Wei Zhao, Hong Yong Xie
• Keywords: Chemical Oxygen Demand (COD), Dyeing Wastewater, pH Value, Photocatalysis, Printing, TiO₂ Nanoparticles

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