NDLI: Bio-electro degradation of azo-dye in a combined anaerobic–aerobic process along with energy recovery

Content Provider	Royal Society of Chemistry (RSC)
Author	Sabir, Suhail Oves, Mohammad Khan, Mohammad Danish Sultana, Saima Khan, Mohammad Zain Gani, Khalid M.
Copyright Year	2015
Abstract	A combined anaerobic–aerobic process involving a single chambered microbial fuel cell (SMFC) followed by an aerobic downstream treatment process is selected for the complete removal of reactive orange 16 (RO 16) from contaminated water. The degradation of azo-dye in SMFC results in the formation of aromatic amines with simultaneous production of electricity. The degradation products of the SMFC were further treated in an activated sludge downstream process in order to provide complete solution from dye wastewater. More than 90% of the chemical oxygen demand (COD) was removed in the combined process for all the test concentrations. The maximum output cell potential and the coulombic efficiency (CE) were 423 mV and 3.4% respectively. SEM images of the mixed microbial culture showed the presence of cocci, diatoms and rod shaped bacteria. Cyclic voltammetry revealed that a perfect redox process took place in the SMFC system. The results of the gas chromatography coupled with the mass spectroscopy (GC/MS) technique showed that RO 16 was first converted into aromatic amines in SMFC which were further transformed into phthalic acid and finally into benzoic acid. The results of the present work demonstrate that wastewater containing complex and toxic dyes can be successfully treated in SMFC followed by aerobic post-treatment along with energy recovery.
Starting Page	9461
Ending Page	9470
Page Count	10
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	39
Issue Number	12
Journal	New Journal of Chemistry
DOI	10.1039/c5nj01610j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Activated sludge Microbiological culture Spectroscopy Redox Energy recovery Wastewater Cyclic voltammetry Azo compound Dye Gas chromatography Chemical oxygen demand Cellular respiration Microbial fuel cell Bacteria
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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