Journal of Environmental Biology

Anaerobic degradation kinetics of reactive dye with different carbon sources

Sunantha Laowansiri*¹, Soydoa Vinitnantharat¹, Pawinee Chaiprasert² and Sung Ryong Ha³

¹Division of Environmental Technology, School of Energy, Environment and Materials, King Mongkut’s
University of Technology Thonburi, Thungkru, Bangkok - 10140, Thailand

²Division of Biotechnology, School of Bioresources and Technology, King Mongkut’s University of Technology Thonburi,
Thakam, Bangkhuntien, Bangkok - 10150, Thailand

³Department of Urban Engineering, Chungbuk National University, Keshindong Heudukgu Cheongju, Chungbuk - 361-763, Korea

(Received: January 01, 2007; Revised received: August 08, 2007; Accepted: September 04, 2007)

Abstract: This study aims to investigate the anaerobic degradation kinetics of reactive dye, C.I. Reactive Red 141 (Evercion Red H-E7B) by partially granulated anaerobic mixed culture using three carbon sources, namely, modified starch (MS), polyvinyl alcohol (PVA) and acrylic size (AS) during batch incubation. There is a first-order kinetics reaction in the decolorization processes using MS and PVA as carbon sources, while a zero-order kinetics relationship describes the decolorization process for the AS carbon source. The k values and color removal rate of decolorization with MS carbon source was higher than those of PVA and AS carbon sources. This is because the MS carbon source was well degraded in comparison to AS and PVA, respectively. This study also found dye reduction could be enhanced through the addition of MS as a carbon source. The decolorization rates increased with decrease in dye concentrations of RR 141. In contrast, the decolorization rates increased with increase in COD concentration.

Key words: Anaerobic degradation, Biological treatment, Decolorization, Kinetics, Reactive dye

PDF of full length paper is available with author (sunantha18@yahoo.com, sunantha.l@msu.ac.th)

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