Decolorization and COD Removal of Saline Brine by Ozonation

Abstract:

Salt lakes with large reserves of mineral resources are widely distributed in China. In addition to aboundant inorganic substances, there also exist a mass of organic compounds in the brine. It is realized these organic compounds can produce serious negative effects on the process equipment and products quality. In this work, the decolorization and COD removal of the brine by ozonation were investigated in a bubble column reactor. The effects of contact time, ozone-air flow rate, pH and temperature on the decolorization and COD removal were investigated. It was found that the decolorization and COD removal rates increased with increasing ozone-air flow rate and contact time, while increased first and then decreased with increasing temperature and pH. Under the optimal conditions, color removal reached 47.3% and COD was reduced by 42.2%. Thus, ozonation can be used as the pretreatment method for decolorization and COD removal of the brine.

• Periodical: Advanced Materials Research (Volumes 962-965)
• Pages: 829-832
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.962-965.829
• Online since: June 2014
• Authors: Wen Tao Yi*, Chun Yan Yan, Xiao Xia Wu
• Keywords: COD Removal, Decolorization, Ozonation, Saline Brine

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