Biodegradation of acid orange 7 in an anaerobic-aerobic sequential treatment system

被引：23
作者：
Garcia-Martinez, Y. [1 ]
Bengoa, C. [1 ]
Stueber, F. [1 ]
Fortuny, A. [2 ]
Font, J. [1 ]
Fabregat, A. [1 ]
机构：
[1] Univ Rovira & Virgili, Dept Engn Quim, ETSEQ, E-43007 Tarragona, Catalunya, Spain
[2] Univ Politecn Cataluna, Dept Engn Quim, EPSEVG, Vilanova I La Geltru 08800, Catalunya, Spain
来源：
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2015年 / 94卷
关键词：
Biodegradation; Acid orange 7; Anaerobic-aerobic sequential treatment; Aromatic amines; AZO DYES; DECOLORIZATION; DEGRADATION; REDUCTION;
D O I：
10.1016/j.cep.2014.12.011
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The decolorization of azo dye Acid Orange 7 (AO7) was studied in a sequential anaerobic/aerobic reactor system; the anaerobic stage was carried out in a continuous upflow stirred packed-bed reactor (USPBR) filled with biological sludge carbonaceous material (BSCM) and aerobic stage took place in an aerobic membrane bioreactor (aerobic MBR). In a continuous USPBR-BSCM system, azo dye bioconversion rates were about 99% at very short space times (tau) 1.02-16 min. In the sequential aerobic stage, hydraulic retention times (HRTs) were determined on removal efficiencies of chemical oxygen demand (COD), resulting about 66% at 48 h. Total organic carbon (TOC) assay showed a removal efficiency about 54.37%, suggesting the degradation of the aromatic amines produced in the anaerobic reactor. Total aromatic amine (TAA) values were 45.30 and 8.97 mg L-1 in USPBR and aerobic MBR respectively, resulting in about 80.28% removal efficiency. These results indicate that anaerobic sequential USPBR/aerobic MBR reactor system seems to be an effective and promising system for complete azo dye biodegradation. (C) 2015 Elsevier B.V. All rights reserved.
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页码：99 / 104
页数：6
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