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Yang, Jian; Xu, Shuang-yan; Zhang, Tao; Zhao, Zhuo-qun; Xie, Xiao-jie; Wang, Wen-fan; Zhang, Cheng; Zheng, Hua-bao
Bioresource technology, September 2023, 2023-Sep, 2023-09-00, 20230901, Volume: 384Journal Article
Display omitted •A dual bacterial consortium for erythromycin degradation is constructed.•Proposal of a new erythromycin biodegradation pathway.•The rare erythromycin esterase gene ereD is found in strain ERY-6B.•Efficient adsorption of modified coconut shell activated carbon for erythromycin.•96% of erythromycin is removed by immobilized cells within 24 h. Removing erythromycin from the environment is a major challenge. In this study, a dual microbial consortium (Delftia acidovorans ERY-6A and Chryseobacterium indologenes ERY-6B) capable of degrading erythromycin was isolated, and the erythromycin biodegradation products were studied. Coconut shell activated carbon was modified and its adsorption characteristics and erythromycin removal efficiency of the immobilized cells were studied. It was indicated that alkali-modified and water-modified coconut shell activated carbon and the dual bacterial system had excellent erythromycin removal ability. The dual bacterial system follows a new biodegradation pathway to degrade erythromycin. The immobilized cells removed 95% of erythromycin at a concentration of 100 mg L−1 within 24 h through pore adsorption, surface complexation, hydrogen bonding, and biodegradation. This study provides a new erythromycin removal agent and for the first time describes the genomic information of erythromycin-degrading bacteria, providing new clues regarding bacterial cooperation and efficient erythromycin removal.
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