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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14647
Title: Bacteria-mediated bio-degradation of reactive azo dyes coupled with bio-energy generation from model wastewater
Authors: Mishra S.
Nayak J.K.
Maiti, Abhijit
Published in: Clean Technologies and Environmental Policy
Abstract: Abstract: The wastewaters produced from dyeing process in textile industries contain xenobiotic mixed reactive dyes that have negative impact on ecosystem when discharged as untreated/partially treated. The present study aims to degrade mixed dyes (reactive red 21 (RR21) and reactive orange 16 (RO16)) present in wastewater by Pseudomonas aeruginosa 23N1. The process optimization and the effect of experimental parameters (like amount of co-substrate, pH and temperature) on process performance are investigated through response surface methodology. To understand the extent of degradation of dye compounds, metabolites extracted from treated water samples were investigated using UV–visible, FTIR and GC-MS analyses. The results reveal that the bacteria could significantly reduce ADMI value of wastewater by ~ 87% against the initial mixed dyes containing aqueous solution (50 mg/L each of RR21 and RO16 dyes). The analysis of extracted metabolites from treated water sample indicates the utilization of dye compounds as nutrient by bacteria. The bacteria might exhibit satisfactory ADMI reduction in the presence of initial ≤ 100 mg/L Cr(VI) concentration. The bio-degradation is performed under microbial fuel cell in the presence of co-substrate yeast extract and found very much promising in terms of faster ADMI reduction and energy production. The maximum output voltage generation of 790 ± 5 mV and power density 940.61 ± 5 mW/m2 are recorded during decolourization of mixed dye-laden real wastewater in a microbial fuel cell. The bacteria studied here confirm the effective bio-decolourization of real textile wastewater. Graphic abstract: [Figure not available: see fulltext.]. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
Citation: Clean Technologies and Environmental Policy (2020), 22(3): 651-667
URI: https://doi.org/10.1007/s10098-020-01809-y
http://repository.iitr.ac.in/handle/123456789/14647
Issue Date: 2020
Publisher: Springer
Keywords: Bacteria
Bacteria microbial fuel cell
Dye
Salt tolerant
Wastewater treatment
ISSN: 1618954X
Author Scopus IDs: 55353346500
57194977999
23994098600
Author Affiliations: Mishra, S., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, Uttar Pradesh 247001, India
Nayak, J.K., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, Uttar Pradesh 247001, India
Maiti, A., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, Uttar Pradesh 247001, India
Funding Details: The authors acknowledge the financial support from Ministry of Human Resource Development (MHRD), Government of India, for student scholarship and funding support through project (IMPRINT scheme, Project number: 6125) along with Ministry of Urban Development, New Delhi, India.
Corresponding Author: Maiti, A.; Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, India; email: mabhifpt@iitr.ac.in
Appears in Collections:Journal Publications [PE]

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