Efficient azo dye decolorization in a continuous stirred tank reactor (CSTR) with built-in bioelectrochemical system. (October 2016)

• Record Type: Journal Article
• Authors: Cui, Min-Hua; Cui, Dan; Gao, Lei; Cheng, Hao-Yi; Wang, Ai-Jie
• Is Part Of: Bioresource technology. Volume 218(2016)
• Page Start: 1307
• Page End: 1311
• Publication Date: 2016-10
• Subjects: Continuous stirred tank reactor (CSTR) -- Bioelectrochemical system (BES) -- Azo dye -- Sludge concentration -- Sodium acetate concentration; 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.2016.07.135
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: A newly designed CSTR-BES was developed for efficient azo dye removal. BES module took an important role for increasing decolorization rate. The effects of anaerobic sludge and acetate concentration were investigated. Abstract: A continuous stirred tank reactor with built-in bioelectrochemical system (CSTR-BES) was developed for azo dye Alizarin Yellow R (AYR) containing wastewater treatment. The decolorization efficiency (DE) of the CSTR-BES was 97.04 ± 0.06% for 7 h with sludge concentration of 3000 mg/L and initial AYR concentration of 100 mg/L, which was superior to that of the sole CSTR mode (open circuit: 54.87 ± 4.34%) and the sole BES mode (without sludge addition: 91.37 ± 0.44%). The effects of sludge concentration and sodium acetate (NaAc) concentration on azo dye decolorization were investigated. The highest DE of CSTR-BES for 4 h was 87.66 ± 2.93% with sludge concentration of 12, 000 mg/L, NaAc concentration of 2000 mg/L and initial AYR concentration of 100 mg/L. The results in this study indicated that CSTR-BES could be a practical strategy for upgrading conventional anaerobic facilities against refractory wastewater treatment.