Insight into the benefits of anammox bacteria living as aggregates. (December 2020)

• Record Type: Journal Article
• Authors: Ma, Jinyuan; Yang, Meijuan; Shi, Chuan; He, Conghui; Yuan, Quan; Li, Kun; Gong, Hui; Wang, Kaijun
• Is Part Of: Bioresource technology. Volume 318(2020)
• Publication Date: 2020-12
• Subjects: Inhibition -- Kinetics -- Extracellular polymeric substance (EPS) -- Multispecies interactions -- Spatial structures; 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.2020.124103
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Understandsing microbial aggregation behavior from benefit-driven perspective. Aggregates gained benefits in biological activity and toxicity resistance. Benefit mechanism was clarfied via kinetics, EPS, heme c and microbial community. Aggregates benefit by diverse microbial communities and organized spatial structure. Abstract: This work tried understanding aggregation preference of anammox bacteria from benefit-driven perspective. Aggregated anammox sludge (AGS) gained benefits in specific anammox activity (SAA) (increased by 40.47 ± 12.64%) and in toxicity resistance (enhanced by 65.41%) than scattered anammox sludge (SCS), which were verified by kinetics. The increased heme c content by 35.67 ± 5.77% and enhanced relative abundance of anammox bacteria by 9.29% supported the benefits in biological activity and improved EPS content by 1097.59 ± 43.06% (622.16 ± 61.73% for protein (PN), 2403.47 ± 162.75% for humic acid (HA) and 1145.34 ± 97.33% for polysaccharide (PS)) justified the benefits in toxicity resistance. The diverse microbial communities and organized spatial structures owned by AGS promoted interactions between species, as the intrinsic justification for obtaining the benefits. We expect our findings to provide theoretical guidance for promotions and applications of the anammox process with excellent nitrogen removal capacity and stability.