Study on the mechanism of inhibiting the calcification of anaerobic granular sludge induced by the addition of trace signal molecule (3O-C6-HSL). (January 2022)

• Record Type: Journal Article
• Authors: Fu, Wencai; Li, Meiling; Dang, Wenhao; Zhu, Kaili; Chen, Guoning; Zhang, Jian; Wang, Shuangfei; Guo, Yanzhu; Wang, Zhiwei
• Is Part Of: Bioresource technology. Volume 344:Part A(2022)
• Publication Date: 2022-01
• Subjects: Signal molecules -- Calcified anaerobic granular sludge -- Quorum sensing -- Microbial community structure -- Porosity; 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.2021.126232
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Various molalities of 3O-C6-HSL were added to calcified AnGS to recover activity. 1 μM 3O-C6-HSL had the best effect on the activity recovery of calcified AnGS. 3O-C6-HSL increased the sludge pore size and the performance of calcified AnGS. The mechanism for recovering the activity of calcified AnGS was determined. Abstract: Microbiota quorum sensing (QS) induced by 3O-C6-HSL (N-(β-ketocaproyl)-DL-homoserine lactone) inhibited the calcification of anaerobic granular sludge (AnGS), and the mechanism of promoting the activity recovery of calcified AnGS was studied in this paper. Through research, it was speculated that 3O-C6-HSL acted on calcified AnGS residual microorganisms to trigger QS. It enriched many functional microorganisms. For example, it promoted the growth of Methanospirillum . The CO2 could be consumed quickly by Methanospirillum and reduced the calcium carbonate formation. The increase of microbial biomass would promote the activity of sludge. What's more, the pore size and porosity of sludge would increase, so the mass transfer channel will be broadened at same time. All those, could help the calcified AnGS quickly restore the activity and anaerobic system recover normal, which provided a new idea for the emergency rescue of anaerobic system in the future.