Next Article in Journal
Rainfall Threshold for Flash Flood Warning Based on Model Output of Soil Moisture: Case Study Wernersbach, Germany
Previous Article in Journal
Determination of Unsaturated Hydraulic Properties of Seepage Flow Process in Municipal Solid Waste
Article

Comparative Anaerobic Decolorization of Azo Dyes by Carbon-Based Membrane Bioreactor

1
Departament d’Enginyeria Química, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Spain
2
Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh
3
Departament d’Enginyeria Química, Universitat Politècnica de Catalunya, EUPVG, Av. Víctor Balaguer s/n, 08800 Vilanova i la Geltrú, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Antonio Zuorro
Water 2021, 13(8), 1060; https://doi.org/10.3390/w13081060
Received: 5 March 2021 / Revised: 8 April 2021 / Accepted: 9 April 2021 / Published: 12 April 2021
(This article belongs to the Section Wastewater Treatment and Reuse)
This study used a novel integrated technology of ceramic supported carbon membrane (CSCM) to degrade azo dyes through an anaerobic mixed culture. The CSCM worked simultaneously as biofilm support, redox mediator, and nano-filter to enhance the dye decolorization efficiency. The decolorization of Acid Orange 7 (AO7) was initially investigated with and without microorganisms in both ceramic support (CS) and CSCM reactors. The CSCM bioreactor (B-CSCM), operated with microorganisms, gave a maximum decolorization of 98% using a CSCM evolved from 10% weight (wt.) of Matrimid 5218 solution. To know the influence of permeate flow, feed concentration, and dye structure on the decolorization process, different B-CSCMs for dye removal experiments were studied over monoazo AO7, diazo Reactive Black 5 (RB5), and triazo Direct Blue 71 (DB71). The highest color removal, operated with 50 mg·L−1 feed solution and 0.05 L·m−2·h−1 of permeate flux, was 98%, 82%, and 72%, respectively, for AO7, RB5, and DB71. By increasing these parameters to 100 mg·L−1 and 0.1 L·m−2·h−1, the decolorization rate of dye solution still achieved 37% for AO7, 30% for RB5, and 26% for DB71. In addition, the system was run for weeks without apparent loss of activity. These findings make evident that the combined phenomena taking place in CSCM bioreactor result in an efficient, cost-effective, and ecofriendly azo dye decolorization method. View Full-Text
Keywords: anaerobic biodegradation; azo dye; carbon-based membrane; decolorization anaerobic biodegradation; azo dye; carbon-based membrane; decolorization
Show Figures

Figure 1

MDPI and ACS Style

Amin, M.S.A.; Stüber, F.; Giralt, J.; Fortuny, A.; Fabregat, A.; Font, J. Comparative Anaerobic Decolorization of Azo Dyes by Carbon-Based Membrane Bioreactor. Water 2021, 13, 1060. https://doi.org/10.3390/w13081060

AMA Style

Amin MSA, Stüber F, Giralt J, Fortuny A, Fabregat A, Font J. Comparative Anaerobic Decolorization of Azo Dyes by Carbon-Based Membrane Bioreactor. Water. 2021; 13(8):1060. https://doi.org/10.3390/w13081060

Chicago/Turabian Style

Amin, Mohammad S.A.; Stüber, Frank; Giralt, Jaume; Fortuny, Agustin; Fabregat, Azael; Font, José. 2021. "Comparative Anaerobic Decolorization of Azo Dyes by Carbon-Based Membrane Bioreactor" Water 13, no. 8: 1060. https://doi.org/10.3390/w13081060

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop