A horizontal plug-flow baffled bioelectrocatalyzed reactor for the reductive decolorization of Alizarin Yellow R. (November 2015)

• Record Type: Journal Article
• Authors: Sun, Qian; Li, Zhiling; Wang, Youzhao; Cui, Dan; Liang, Bin; Thangavel, Sangeetha; Chung, Jong Shik; Wang, Aijie
• Is Part Of: Bioresource technology. Volume 195(2015)
• Page Start: 73
• Page End: 77
• Publication Date: 2015-11
• Subjects: Plug-flow baffled bioelectrocatalyzed reactor (PFB-BER) -- Alizarin Yellow R (AYR) -- Decolorization efficiency (DE) -- Electrode assembly number; 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.2015.06.086
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: A plug-flow baffled bioelectrocatalyzed reactor (PFB-BER) was constructed. Membrane-less design of PFB-BER resulted in a low internal resistance. Effects with different HRT and number of electrode assembly were evaluated. PFB-BER showed superior Alizarin Yellow R (AYR) decolorization performance. Abstract: An application-oriented membrane-free, continuous plug-flow baffled bioelectrocatalyzed reactor (PFB-BER), was designed and testified for the decolorization of Alizarin Yellow R. Decolorization efficiency (DE) with an external power source of 0.5 V was higher than without electrolysis, i.e. 93.4% versus 73.6% (HRT of 24 h). Product formation efficiencies of p-phenylenediamine and 5-aminosalicylic acid were above 95% and 50%, respectively. When HRT decreased to 8 h and 4 h, DE reduced to 69.9% and 44.9%, respectively. An additional electrode assembly improved DE to 96.4% (HRT of 8 h) and 80% (HRT of 4 h), while energy consumption (HRT of 4 h) was lower than that of HRT of 12 h with single electrode assembly under comparable DE. The PFB-BER with higher removal capacity, lower internal resistance and energy consumption provides a new solution to treat the high loading azo dye-containing wastewaters.