Treatment of azo dye-containing synthetic textile dye effluent using sulfidogenic anaerobic baffled reactor.
This study aims at investigating azo dye reduction performance of a sulfidogenic anaerobic baffled reactor (ABR) for around 400 days. ABR was operated at 30 °C in a temperature-controlled room and hydraulic retention time (HRT) was kept constant at 2 days. The robustness of ABR was assessed under varying azo dye loadings and COD/sulfate ratios. Additionally, oxygen was supplied (1-2 L air/m(3)reactor min) to the last compartment to investigate the removal of azo dye breakdown products. ABR performed well in terms of COD, sulfate and azo dye removals throughout the reactor operation. Maximum azo dye, COD and sulfate removals were 98%, 98% and 93%, respectively, at COD/sulfate ratio of 0.8. Aeration created different redox conditions in last compartment, which enhanced the removal of COD and breakdown products. The adverse effects of aeration on azo dye reduction were eliminated thanks to the compartmentalized structure of the ABR.
Kahramanmaras Sutcu Imam University, Department of Bioengineering and Science, Kahramanmaras 46100, Turkey.
Sebnem
S
Ozdemir
Kahramanmaras Sutcu Imam University, Department of Environmental Engineering, Kahramanmaras 46100, Turkey. Electronic address: kewss_@hotmail.com.
Kevser
K
Cirik
Kahramanmaras Sutcu Imam University, Department of Bioengineering and Science, Kahramanmaras 46100, Turkey.
Dilek
D
Akman
Istanbul Medeniyet University, Department of Bioengineering, Goztepe, Istanbul, Turkey.
Erkan
E
Sahinkaya
Kahramanmaras Sutcu Imam University, Department of Environmental Engineering, Kahramanmaras 46100, Turkey; International University of Sarajevo, Bioengineering and Genetics Program, Hrasnicka Cesta 15, 71210 Sarajevo, Bosnia and Herzegovina.
Ozer
O
Cinar
D000588:Amines / Q000737:chemistry; D000693:Anaerobiosis; D001391:Azo Compounds / Q000737:chemistry*; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D004396:Coloring Agents / Q000737:chemistry*; D004867:Equipment Design; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry; D013440:Sulfides / Q000032:analysis / Q000737:chemistry; D013783:Textile Industry; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods*
D000588:Amines; D001391:Azo Compounds; D004396:Coloring Agents; D007220:Industrial Waste; D013431:Sulfates; D013440:Sulfides; D014874:Water Pollutants, Chemical; D010100:Oxygen
Anaerobic baffled reactor (ABR); Azo dye reduction; Sulfate reducing bacteria (SRB); Sulfate reduction; Textile wastewater