Biological and oxidative treatment of cotton textile dye-bath effluents by fixed and fluidized bed reactors.

A treatability study for highly polluted and recalcitrant azo reactive dye-baths from cotton textile dyeing processes was conducted by using fixed and up-flow fluidized bed type reactors packed with brown coal. Ozone oxidation was carried out to assess the combination of biological and chemical oxidation. COD removal efficiencies ranged from 70% to 93%, and up to 99% color removal was attained. At a COD loading rate of 25.5 x 10(-6) gCOD/m(2)-d, COD removal was 85%. Breakthrough of the brown coal used occurred at total organic loading of 0.090 gCOD/g coal. Biodegradable and inert COD fractions of the remazol dye-bath were assessed by BOD(28) and oxygen uptake rate (OUR) measurements. 50% of total COD was initially inert. The inert fraction was reduced by adsorption and ozone oxidation by 65% and 40%, respectively. Brown coal is an inexpensive material and the system has economical and operational advantages as compared to treatment options such as advanced oxidation processes (AOPs) using UV, O(3), H(2)O(2) or electrocoagulation.

[1]  Stephen M. Burkinshaw,et al.  A greener approach to cotton dyeings with excellent wash fastness , 2002 .

[2]  A. Yediler,et al.  Biodegradability oriented treatability studies on high strength segregated wastewater of a woolen textile dyeing plant. , 2004, Chemosphere.

[3]  Derin Orhon,et al.  A description of three methods for the determination of the initial inert particulate chemical oxygen demand of wastewater , 1994 .

[4]  A Yediler,et al.  Ozonation of hydrolyzed azo dye reactive yellow 84 (CI). , 2002, Chemosphere.

[5]  Kadir Turhan,et al.  Decolorization of direct dye in textile wastewater by ozonization in a semi-batch bubble column reactor , 2009 .

[6]  J Wu,et al.  Ozonation of aqueous azo dye in a semi-batch reactor. , 2001, Water research.

[7]  Ahmet Baban,et al.  Ozonation of high strength segregated effluents from a woollen textile dyeing and finishing plant , 2003 .

[8]  A. Yediler,et al.  Kinetics of decolorization and mineralization of reactive azo dyes in aqueous solution by the UV/H2O2 oxidation , 2002 .

[9]  I. Petrinic,et al.  Wastewater treatment after reactive printing , 2005 .

[10]  O. Ozdemir,et al.  Comparison of the adsorption characteristics of azo-reactive dyes on mezoporous minerals , 2004 .

[11]  Antonius Kettrup,et al.  Decolorization of disperse red 354 azo dye in water by several oxidation processes—a comparative study , 2004 .

[12]  E. Voudrias,et al.  Decolorization of azo-reactive dyes and cotton-textile wastewater using anaerobic digestion and acetate-consuming bacteria , 2004 .

[13]  Xinmiao Liang,et al.  Effects of dye additives on the ozonation process and oxidation by-products: a comparative study using hydrolyzed C.I. Reactive Red 120 , 2004 .

[14]  Zijian Wang,et al.  Ozonation of an azo dye C.I. Remazol Black 5 and toxicological assessment of its oxidation products. , 2003, Chemosphere.

[15]  Chen-Lu Yang,et al.  Electrochemical coagulation for textile effluent decolorization. , 2005, Journal of hazardous materials.

[16]  Isil Akmehmet Balcioglu,et al.  Advanced oxidation of a reactive dyebath effluent: comparison of O3, H2O2/UV-C and TiO2/UV-A processes. , 2002, Water research.

[17]  R. Krull,et al.  Combined biological and chemical treatment of highly concentrated residual dyehouse liquors , 1998 .

[18]  G Ciardelli,et al.  The treatment and reuse of wastewater in the textile industry by means of ozonation and electroflocculation. , 2001, Water research.

[19]  Alexander Aivasidis,et al.  Degradation of azo-reactive dyes by ultraviolet radiation in the presence of hydrogen peroxide , 2002 .

[20]  I. Arslan-Alaton,et al.  Electrocoagulation of simulated reactive dyebath effluent with aluminum and stainless steel electrodes. , 2009, Journal of hazardous materials.

[21]  S. Sözen,et al.  The effect of residual microbial products on the experimental assessment of the particulate inert COD in wastewaters , 1999 .