The Use of Redox Mediators for Enhancing the Decolourisation of Orange G in a Sequencing Batch Reactor (SBR)

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The declorization of the acid azo dye, Orange G (Acid Orange 10) in an anaerobic phase of the anaerobic-aerobic sequencing batch reactor feed by synthetic wastewater was investigated. Moreover, the impact of a redox mediator (AQS) on the color removal was studied. it is for the first time that the decolorization of Orange G is investigated in SBR system with activated sludge. The redox mediator was really effective for cleavage the azo band and increased the efficiency of the reactor. When 20 mg/l of Orange G was added to the sysnthetic wastewater, the decolorization efficiency was 50 % without the addition of AQS. The decolorization efficiency increased up to 75% when the small quantity of AQS, 0.05nM, was added to the wastewater. The high COD removal of synthetic dye wastewater was observed during the operation. The COD removal was always in the range of 80-90 %.
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Activated Sludge; Azo Dye; Biodegradation; SBR

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Soon-An Ong, Eiichi Toorisaka, Makoto Hirata, Tadashi Hano, Granular activated carbon-biofilm configured sequencing batch reactor, Dyes and Pigments 76 (2008) 142-146.

N.C.G Tan, F.X Prenafeta-Boldu, J.L. Opsteeg, G.Lettinga, J.A Field, Biodegradation of azo dyes in co-cultures of anaerobic granular sludge with aerobic aromatic amine degrading enrichment cultures, Microbiology and Biotechnology 51 (1999) 865-871.

Frank P. van der Zee, Renske H. M. Bouwman, David P.B.T.B Strike, Gatza Lettinga, Jim A. Field, Application of redox mediators to accelerate the transformation of reactive azo dyes in anaerobic bioreactors, John Wiley & Sons (2001)

N.D Lourenco, J.M Novaise, H.M Pinheiro, Reactive textile dye color removal in a sequencing batch reactor, Water Science and Technology Vol 42 Nos 5-6 (2000) 321-328.

N.D Lourenco, J.M Novaise, H.M Pinheiro, Analysis of secondry metabolite fate during anaerobic-aerobic azo dye biodegradation in a sequential batch reactor, Environmental Technology Vol 24 (2003) 679-686.

Mustafa Isik, Delia Teresa Sponza, Moitoring oftoxicity and intermediates of C.I Direct Black 38 azo dye through decolourisation in an anaerobic/aerobic sequential reacto system, Journal of Hazardous B114 (2004) 29-39.

Frank der Zee, Iemke A.E Bisschps, Gatze Lettinga, Jim A.Field, Activated carbon as an electron acceptor and redox mediator during the anaerobic biotransformation of azo dyes, Environmental Science and Technology 37 (2003) 402-408.

Andre B. dos Santos, Iemke A.E Bisschops, Francisco J. Cevantes, Jules B. van Lier, Effect of different redox mediators during thermophilic azo dye reductn by anaerobic granula sludge and comparative study between mesophilic (30 ºC) and thermophilic (55 ºC) treatments for decolourisation of textile wastewates, Chemosphere 55 (2004) 1149-1157.

Jorg Rau, Hans-Joachim Knackmuss, Andreas Stolz, Effects of different quinoid redox mediator on the anaerobic reduction of azo dyes by bacteria, Enviromental and Technology 36 (2002) 1497-1504.

M.G.E. Albuquerque, A.T.Lopes, M.L. Serralheiro, J.M. Novais, H.M. Pinheiro, Biological sulphate reduction and redox mediator effects on azo dye decolourisation in anaerobic-aerobic sewquencing batch reactors, Enzyme and Microbial Technology 36 (2005) 790-799.

Soon-An Ong, Eiichi Tooriska, Makoto Hirata, Tadashi Hano, Decolorization of azo dye in a sequential UASB-SBR system, Separation and Purification Technology 42 (2005) 297-302.


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