Pre-ozonation of aqueous azo dye (Acid Red-151) followed by activated sludge process

Gokcen, Fulya
Ozbelge, Tulay A.
In this study, the efficiency of the integrated process was investigated in which the pre-ozonation step was followed by activated sludge process (ASP) in treating the aqueous Acid Red-151 (AR 151) solutions. The percent dye removal in the integrated process was found to be 47% for a pre-ozonation time of 30 min, instead of 25% in the singly ASP without pre-ozonation. The treatment efficiency of this process could be higher if the pre-ozonation time of 120 min yielding maximum enhancement of biodegradability at a peak value of BOD5/COD ratio were used before the biological treatment process.


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Çalık, Pınar; Calik, G; Ozdamar, TH (Elsevier BV, 2003-02-01)
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Effects of pH, Initiator, Scavenger, and Surfactant on the Ozonation Mechanism of an Azo Dye (Acid Red-151) in a Batch Reactor
Oezbelge, Tuelay A.; Erol, Funda (Informa UK Limited, 2009-01-01)
In this study, an initiator (Fe2+) and a scavenger (CO32(-)) were used at different concentrations in a batch reactor to investigate the reaction mechanism of ozonation of a model azo dye, namely Acid Red-151 (AR-151). Also, the effect of a nonionic surfactant known as a major pollutant in many industrial wastewaters, namely polyethylene glycol (PEG), was observed on the degradation rate of AR-151. The experimental parameters and their ranges were: pH (2.5-10), initiator (0.8-50mg/L of Fe2+), surfactant (10...
Citation Formats
F. Gokcen and T. A. Ozbelge, “Pre-ozonation of aqueous azo dye (Acid Red-151) followed by activated sludge process,” CHEMICAL ENGINEERING JOURNAL, pp. 109–115, 2006, Accessed: 00, 2020. [Online]. Available: