Upflow fixed bed bioelectrochemical reactor for wastewater treatment applications. (January 2015)

• Record Type: Journal Article
• Authors: González-Gutiérrez, Linda; Frontana, Carlos; Martínez, Eduardo
• Is Part Of: Bioresource technology. Volume 176(2015)
• Page Start: 292
• Page End: 295
• Publication Date: 2015-01
• Subjects: Microbial Electrolysis cells -- Upflow fixed bed bioelectroreactor -- Azo dye removal -- Hydrodynamic analysis -- Residence time distribution; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2014.11.018
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Higher dispersion in the UFB-BER reactor increases the degradation kinetic constant. Degradation rate, mass transfer and kinetics are affected by hydrodynamic behavior. Hydraulic residence time can be reduced and obtain high-quality removal efficiency. Abstract: A cylindrical Upflow Fixed Bed Reactor (UFB-BER) with granular activated carbon, steel mesh electrodes and anaerobic microorganisms, was constructed for analyzing how hydrodynamic parameters affect the reactions involved during wastewater treatment processes for azo dye degradation. Dye removal percentage was not compromised by decreasing HRTm (99–90% upon changing HRTm from 4 to 1 h in single pass mode). Using the residence time distribution method for hydrodynamic characterization, it was found that a higher dispersion in the reactor occurs for HRTm = 1 h, than for HRTm = 4 h. A kinetic analysis suggests that this dispersion effect could be associated to a higher specific reaction rate dependent on the azo dye concentration.