Effect of Fe3+ on the nutrient removal performance and microbial community in a biofilm system

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: April 6, 2023

In this study, the influence of Fe 3+ on N removal, microbial assembly, and species interactions in a biofilm system was determined. The results showed that maximum efficiencies ammonia nitrogen (NH 4 + -N), total (TN), phosphorus (P), chemical oxygen demand (COD) removal were achieved using 10 mg/L , reaching values 100, 78.85, 95.8%, respectively, whereas at concentrations 15 30 suppressed NH -N, TN, COD. terms absolute abundance, expression bacterial amoA narG nirK napA maximal presence (9.18 × 5 8.58 8 1.09 1.07 9 copies/g dry weight, respectively). Irrespective concentrations, P efficiency remained almost 100%. Candidatus _Competibacter (10.26–23.32%) identified as most abundant genus within system. Determinism (50%) stochasticity contributed equally to community assembly. Co-occurrence network analysis revealed 60.94% OTUs exhibited positive interactions, 39.06% negative interactions. Within OTU-based co-occurrence network, fourteen key microbes. stability found be predominantly shaped by cooperation, complemented competition for resources or niche incompatibility. study suggested during wastewater treatment plants methods, concentration supplemental should maintained mg/L, which would not only contribute elimination, but also enhance COD removal.

Language: Английский

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Photosynthesis Characterization of Mutant Chlorella Vulgaris and the Enhanced Performance of Algae-Bacteria Symbiosis Treating Municipal Wastewater

Published: Jan. 1, 2024

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Language: Английский

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Enhanced Removal of Tn in Shale Gas Wastewater by a Novel Porous Polymer Monolith Immobilized Microorganisms

Published: Jan. 1, 2024

Shale gas flowback and produced water (SGFPW) pose significant challenges to biotechnology due their high salinity. In this study, we explored a novel method utilizing an amphiphilic copolymer of methyl methacrylate acrylamide (p(MMA-AAM)) powdered activated carbon (PAC) modify poly(ether sulfone) (PES). We prepared series monoliths for microorganism immobilization using both thermal-induced phase separation non-solvent-induced separation. Characterization the via FTIR, SEM, BET analysis revealed improved hydrophilicity in p(MMA-AAM)-modified increased specific surface area (SSA) with PAC addition. Particularly, highest SSA was observed 0.5 g (0.5-PAC/PES) monolith at 235.1861 m2/g. Wastewater treatment experiments demonstrated that 0.5-PAC/PES system exhibited superior pollutant removal performance. It enhanced microbial efficiency promoted growth, thereby boosting biological efficacy efficiency. The achieved nearly 100% NO3- total nitrogen (TN) simulated SGFPW. Besides, rates TN organic (TOC) actual SGFPW by were 1.5 times 1.3 higher, respectively, than those suspended microorganisms. This work introduces new approach immobilize microorganisms, enhancing activity under salinity conditions.

Language: Английский

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Functional Microbial Inoculants Affect the Balance of Dnra and Denitrification Pathways in Compost Amended Soil

Published: Jan. 1, 2024

Language: Английский

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Enhanced Removal of Tn in Shale Gas Wastewater by a Novel Porous Polymer Monolith Immobilized Microorganisms

Published: Jan. 1, 2024

Language: Английский

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