Optimization of integrated chemical-biological degradation of a reactive azo dye using response surface methodology

Sudarjanto, Gatut, Keller-Lehmann, Beatrice and Keller, Jurg (2006) Optimization of integrated chemical-biological degradation of a reactive azo dye using response surface methodology. Journal of Hazardous Materials, 138 1: 160-168. doi:10.1016/j.jhazmat.2006.05.054


Author Sudarjanto, Gatut
Keller-Lehmann, Beatrice
Keller, Jurg
Title Optimization of integrated chemical-biological degradation of a reactive azo dye using response surface methodology
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 0304-3894
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2006.05.054
Volume 138
Issue 1
Start page 160
End page 168
Total pages 9
Editor G. Lyberatos
M. F. Fingas
Place of publication Amsterdam
Publisher Elsevier Science Bv
Language eng
Subject C1
279999 Biological Sciences not elsewhere classified
779999 Other
Abstract The integrated chemical-biological degradation combining advanced oxidation by UV/H2O2 followed by aerobic biodegradation was used to degrade C.I. Reactive Azo Red 195A, commonly used in the textile industry in Australia. An experimental design based on the response surface method was applied to evaluate the interactive effects of influencing factors (UV irradiation time, initial hydrogen peroxide dosage and recirculation ratio of the system) on decolourisation efficiency and optimizing the operating conditions of the treatment process. The effects were determined by the measurement of dye concentration and soluble chemical oxygen demand (S-COD). The results showed that the dye and S-COD removal were affected by all factors individually and interactively. Maximal colour degradation performance was predicted, and experimentally validated, with no recirculation, 30 min UV irradiation and 500 mg H2O2/L. The model predictions for colour removal, based on a three-factor/five-level Box-Wilson central composite design and the response surface method analysis, were found to be very close to additional experimental results obtained under near optimal conditions. This demonstrates the benefits of this approach in achieving good predictions while minimising the number of experiments required. (c) 2006 Elsevier B.V. All rights reserved.
Keyword Engineering, Environmental
Engineering, Civil
Environmental Sciences
Textile Dye
Colour Removal
Uv/h2o2
Chemical-biological Process
Response Surface Methodology
Hydrogen-peroxide
Decolorization
Oxidation
Water
Mineralization
Effluents
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 19:01:26 EST