Response of anodic bacterial community to the polarity inversion for chloramphenicol reduction. (December 2016)

• Record Type: Journal Article
• Authors: Yun, Hui; Kong, Deyong; Liang, Bin; Cui, Minhua; Li, Zhiling; Wang, Aijie
• Is Part Of: Bioresource technology. Volume 221(2016)
• Page Start: 666
• Page End: 670
• Publication Date: 2016-12
• Subjects: Chloramphenicol reduction -- Polarity inversion -- Bacterial communities -- Bidirectional electron transfer; 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.2016.09.047
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: The biofilm established from bioanode reduced CAP effectively. The electroactive microbes adapted to the bidirectional electron transfer. Nitroaromatics-reducing genera dominated in the established biocathode. Abstract: Chloramphenicol (CAP) is a frequently detected environmental pollutant. In this study, an electroactive biofilm for CAP reduction was established by initially in the anode and then inverting to the cathode. The established biocathode could enhance the reduction of CAP to the nitro-group reduced CAP (AMCl2) and further dechlorinated form (AMCl), both had lost the antibacterial activity. The phylogenetic diversity of the acclimated biofilm was decreased after the polar inversion. Proportions of functional bacterial genera, including Geobacter, Desulfovibrio and Pseudomonas responsible for the bidirectional electron transfer and nitroaromatics reduction, had increased 28%, 104% and 43% in the cathode. The relatively high abundances (over 50%) of Geobacter in anode and cathode were rarely detected for the nitroaromatics reduction. This study provides new insights into the electroactive biofilm structure improvement by the polarity inversion strategy for refractory antibiotics degradation.