Degradation of sulfamethoxazole in bioelectrochemical system with power supplied by constructed wetland-coupled microbial fuel cells. (November 2017)

• Record Type: Journal Article
• Authors: Zhang, Shuai; Yang, Xiao-Li; Li, Hua; Song, Hai-Liang; Wang, Ri-Cheng; Dai, Zhe-Qin
• Is Part Of: Bioresource technology. Volume 244:Part 1(2017)
• Page Start: 345
• Page End: 352
• Publication Date: 2017-11
• Subjects: Sulfamethoxazole -- Degradation pathway -- Bioelectrochemical system -- Microbial fuel cell -- Methanogenic communities; 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.2017.07.143
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Rapid removal of SMX in BER was simulated with a first-order kinetic model. Low current did not affect the degradation products but did promote SMX removal rate. Biotransformation was the main pathway of SMX elimination in BER. Stacked CW-MFCs supplied sufficient electricity to support BER for SMX degradation. Abstract: The removal rate and degradation pathway of Sulfamethoxazole (SMX) in bioelectrochemical system (BES) and the elimination dynamics of SMX in a BES driven by stacked constructed wetland-coupled microbial fuel cells (CW-MFCs) were investigated. The results found that SMX (30 mg L −1 ) was rapidly degraded in the BES, and the SMX removal kinetics was simulated well by a first-order kinetic model ( R 2 > 0.93). Low current had no effect on the degradation products but enhanced the SMX removal rate. Biotransformation was the main pathway for the SMX elimination in the BES. The CW-MFCs supplied adequate and stable electricity (0.84–1.01 V) to support the BES for rapid SMX degradation without additional energy inputs. The relative abundance of Methanosarcina (18.7%) and VadinCA11 (3.1%) increased with an increase in voltage up to 1.2 V. However, the opposite was observed for Methanosaeta and Methanomassiliicoccus . The current in the BES influenced the methanogenic communities.