Efficient removal of tetracycline using U-type continuous-flow bioelectrochemical system without ion exchange membrane or cathodic catalyst
Journal
Bioresource Technology
Journal Volume
346
Date Issued
2022
Author(s)
Abstract
A U-type membraneless continuous-flow bioelectrochemical system was developed to efficiently remove tetracycline and antibiotic resistance genes from synthetic wastewaters at hydraulic retention time of only eight hours. At the TC concentration of 20–80 mgL-1 in feed, the removals of tetracycline all exceeded 95%, over 60–1200 mgL-1 chemical oxygen demand, 30–150 mgL-1 NH4+-N, and at 5–25 °C, superior to the performances reported in literature. The maximum power of the BES system peaked at 0.416 Wm?3 at 20 mgL-1 TC feeding, corresponding to open circle voltage of 0.90 V and internal resistance of 799.8 Ω. The community analysis showed that the elevated TC loadings forced the predominate population to be evolved to TC-degrading consortium. The relative abundances of tetA, tetC, tetO, tetQ, and tetW in treated effluent ranged 1.20 × 10-6 to 2.60 × 10-4, revealing that the present BES reactor has superior removal efficiency of antibiotic resistance genes. ? 2022 Elsevier Ltd
Subjects
Antibiotic resistance genes
Bioelectrochemical system
Continuous-flow
Membrane-less
Removal
Tetracycline
Chemical oxygen demand
Effluents
Genes
Ion exchange
Ion exchange membranes
Bio-electrochemical
Hydraulic retention
Ion-exchange membrane
Membraneless
Synthetic wastewater
]+ catalyst
Antibiotics
antibiotics
catalysis
catalyst
concentration (composition)
electrochemical method
electrode
membrane
pollutant removal
antiinfective agent
tetracycline
antibiotic resistance
ion exchange
wastewater
Anti-Bacterial Agents
Drug Resistance, Microbial
Ion Exchange
Waste Water
Type
journal article