New perspective on effect of β-cyclodextrin on nitrification-denitrification and denitrification phosphorus removal in biogenic manganese oxides driven moving bed biofilm reactor: Performance evaluation, microbial community and process

• Published in: Bioresource technology Vol. 386; p. 129502
• Main Authors: Shao, Sicheng, Sheng, Mengcheng, Ye, Yingzi, Wang, Chunxiao, Pan, Dandan, Wu, Xiangwei
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.10.2023
• Subjects: Denitrification; Microbial community; Moving bed biofilm reactor (MBBR); Nitrification; β-cyclodextrin (β-CD); Moving bed biofilm reactor (MBBR); Denitrification; β-cyclodextrin (β-CD); Microbial community; Nitrification
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2023.129502

[Display omitted] •Synergistic effects between BioMnOx and β-CD involved in N and P removal.•β-CD enhanced the MBBR performance for denitrification and TN removal.•β-CD provided the electronic donors for denitrification.•β-CD promoted the EPS secretion, ROS level, and biofilm stability.•BioMnOx concentration was quantified in phases II, III, and IV. Effect of β-cyclodextrin (β-CD) on simultaneous removal of NH4+-N, NO3–-N, COD, and phosphorus (P) in biogenic manganese oxides (BioMnOx) driven moving bed biofilm reactor (MBBR) was investigated. 58.64% and 86.32%, 79.65% and 98.39%, 62.45% and 97.30%, and 24.80% and 95.90% of TN and COD were removed in phases I-IV, indicating that simultaneous nitrification and denitrification (SND) efficiencies were 75.44%, 83.91%, 72.71%, and 35.83%, respectively. Composition and fluorescence spectral characteristics of extracellular polymeric substance (EPS) were evaluated including the removal kinetics of TN and COD. Metabolic activity of Mn2+, decolorization performance of BioMnOx, and reactive oxygen species (ROS) characteristics were determined in biofilm. Furthermore, intermediate Mn3+ and BioMnOx concentration were analyzed. Finally, the removal process of nitrogen (N) and P was proposed based on characterizations of elemental characterization, electrochemistry, and microbial community. This study provides new insights into the N and P removal mediated by BioMnOx and β-CD.