Fig 1.
Schematic diagram of the reactor assembly (SMFC coupled with aerobic reactor) used in the present study.
Fig 2.
Changes in closed circuit cell potential during the treatment of ANB in a SMFC.
Fig 3.
(a) Power density in closed circuit mode along with COD profile during the SMFC treatment of ANB and (b) Columbic efficiency in closed circuit mode along with COD consumed during the treatment of ANB in SMFC coupled aerobic process.
Fig 4.
(a) COD removal efficiency, (b) decolorization kinetics and (c) UV spectra of the pure ANB and treated samples.
Fig 5.
SEM images of the anaerobic and aerobic sludge at magnification of (a) 1500x and (b) 5000x; (c) Elemental composition of the sludge by EDX.
Fig 6.
(a) Population of the universal bacterial gene and electrochemically active Geobacter species in the anaerobic sludge treating ANB, (b)Electrochemical characterization of the fuel cell (cyclic voltammograms).
Fig 7.
Probable degradation pathway of acid navy blue r based on GC/MS data (a- Acid navy blue r; b- 1-Naphthaleinamine; c- Broener’s acid; d- Aniline; e- Diethyl phthalate and f-Phthalic acid).