Remediation of Kraft Effluent by Ozonation: Effect of Applied Ozone Concentration and Initial pH

Authors: Assalin, Marcia R.¹; Rosa, Maria A.¹; Durán, Nelson²

Source: Ozone: Science and Engineering, Volume 26, Number 3, June 2004 , pp. 317-322(6)

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Abstract:

In this study, the impact of ozone concentration (14 and 7mg/L -1 applied for 120min) and pH (10 and 12) on color removal, and reduction of dissolved organic matter (DOC) and total phenol of Kraft E 1 effluent was investigated. The degradation kinetics for the all parameters at pH 12 were slower than of those at pH 10. The degradation at pH 10 ceased after approximately 120min, while for the ozonation at pH 12, ozone was still being consumed even after 5h of treatment. When the ozone dose was increased, the removal efficiency increased; however, the DOC removal efficiency continued limited.

Keywords: Ozone;; Paper Mill Effluent;; Kraft Mill Wastewater;; Concentration;; pH Effect;; Degradation

Document Type: Research article

DOI: http://dx.doi.org/10.1080/01919510490456196

Affiliations: 1: Biological Chemistry Laboratory, Instituto de Química, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil 2: Biological Chemistry Laboratory, Instituto de Química, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil; and, Núcleo de Ciências Ambientais, Universidade de Mogi das Cruzes, Mogi das Cruzes, São Paulo, Brazil

Publication date: 2004-06-01