Distribution characteristics of N-acyl homoserine lactones during the moving bed biofilm reactor biofilm development process: Effect of carbon/nitrogen ratio and exogenous quorum sensing signals. (October 2019)

• Record Type: Journal Article
• Authors: Wang, Jinfeng; Liu, Qiuju; Ma, Sijia; Hu, Haidong; Wu, Bing; Zhang, Xu-xiang; Ren, Hongqiang
• Is Part Of: Bioresource technology. Volume 289(2019)
• Publication Date: 2019-10
• Subjects: C/N ratio -- AHLs -- Quorum sensing -- Biofilm development -- MBBR; 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.2019.121591
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: C10-HSL and C12-HSL were the dominant AHLs during biofilm development. AHLs in the various biofilm fractions were influenced significantly by the C/N ratio. QS signals have a temporary influence due to bacterial community adaptation. Abstract: Carbon/nitrogen (C/N) ratios play an important role in biological wastewater treatment processes, with quorum sensing (QS) coordinating biological group behaviors. However, the relationship between them remains unclear. This study investigated the effects of varying C/N ratios and exogenous QS signals on the distribution characteristics of AHLs in Moving Bed Biofilm Reactors during the biofilm development process. Results show that C10-HSL and C12-HSL were the dominant AHLs, with the highest concentrations observed in the reactor with a C/N ratio of 10, followed by C/N ratios of 20 and 4. With varying C/N ratios, the biofilm microbial community structure changed significantly, which may contribute to significant differences in the distribution of AHLs. Furthermore, with the addition of a QS strain Sphingomonas rubra sp. nov., the pollutant removal efficiency of the reactor was not significantly improved and a reversible change in community composition was temporarily observed.