Long-term effects of combined divalent copper and tetracycline on the performance, microbial activity and community in a sequencing batch reactor. (February 2018)

• Record Type: Journal Article
• Authors: Wang, Zichao; Xia, Pinghui; Gao, Mengchun; Ma, Kedong; Deng, Zhiwei; Wei, Junfeng; Zhang, Jing; Wang, Lin; Zheng, Guoxia; Yang, Yusuo; Chen, Jinbo; Wang, Yuejing
• Is Part Of: Bioresource technology. Volume 249(2018)
• Page Start: 916
• Page End: 923
• Publication Date: 2018-02
• Subjects: Divalent copper -- Tetracycline -- Combined effects -- Microbial activity -- Microbial community; 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.2017.11.006
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Effects of combined Cu(II)/TC on SAOR, SNOR and SNRR were antagonistic. PN and PS in EPS could bind Cu(II), TC and mixed Cu(II)/TC. Long-term effects of combined Cu(II)/TC on microbial community were investigated. Nitrifiers had higher tolerances to Cu(II), TC and mixed Cu(II)/TC than denitrifiers. Abstract: The long-term effects of combined divalent copper (Cu(II)) and tetracycline (TC) on the performance, microbial activity and community in a sequencing batch reactor (SBR) were investigated. The addition of Cu(II), TC or mixed Cu(II)/TC caused the decrease of the organics and nitrogen removal efficiencies, and their decreased degrees were the lowest at the addition of mixed Cu(II)/TC. The increase of mixed Cu(II)/TC concentrations in the influent did not change the antagonistic effects between Cu(II) and TC on nitrifying and denitrifying activities. Nitrifiers had higher tolerances to Cu(II), TC and mixed Cu(II)/TC than denitrifiers. Compared to the addition of Cu(II) or TC alone, the microbial community richness was higher at the addition of mixed Cu(II)/TC, while the microbial community diversity was lower. The increased protein (PN) in extracellular polymeric substances (EPS) was a protective response of bacteria to Cu(II), TC and mixed Cu(II)/TC.