Acute and persistent toxicity of Cd(II) to the microbial community of Anammox process. (August 2018)

• Record Type: Journal Article
• Authors: Zhang, Xiaojing; Chen, Zhao; Ma, Yongpeng; Zhao, Jianguo; Chen, Tao; Fu, Haoqiang; Zhai, Hanfei
• Is Part Of: Bioresource technology. Volume 261(2018)
• Page Start: 453
• Page End: 457
• Publication Date: 2018-08
• Subjects: Cd(II) -- Anammox -- Nitrogen removal -- Heavy metal -- 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.2018.04.055
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Cd(II) performed both acute and persistent inhibition to Anammox process. The IC50 of Cd(II) on Anammox process was calculated as 5.43 mg L −1 . AAOB showed an unsatisfactory self-adaption to Cd(II) in 1–10 mg L −1 . Cadmium content in biofilm was the key factor affecting the AAOB bioactivity. The bioactivity was more highly affected by Cd(II) than the structure of microbial community. Abstract: In this study, the short- and long-term effects of Cd(II) on the bioactivity, nitrogen removal and microbial community of the anaerobic ammonia oxidation (Anammox) process were investigated by step-wise increasing Cd(II). The self-recovery ability of Anammox was also studied after long-term exposure in Cd(II). The bioactivity of anaerobic ammonia-oxidizing bacteria (AAOB) within short-term exposure of Cd(II) were detected by batch experiments. Results showed that Cd(II) had both acute and persistent toxicity to Anammox, the IC50 in short-term exposure was calculated as 5.43 mg L −1 . Long-term exposure led to the microbial diversity increase, as well as the relative abundance decrease of AAOB in Anammox system. AAOB was continuously suppressed by Cd(II) in 1–20 mg L −1, while it had self-adaption to Cd(II) in 1–10 mg L −1 . Anammox biofilm showed prominent adsorbing ability for cadmium, and the cadmium in biofilm was the key factor affecting Anammox.