MESSAI.iO

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This MES study investigates Ectopic electronic compensation, Electroautotrophic denitrification, Functional gene prediction. The research focuses on system optimization and characterization.

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Abstract

It is essential to remediate the polluted aquaculture water and sediment, which destroys aquatic ecosystem. In this study, a novel ecological floating bed coupled with close-circuit microbial electrochemical system was designed for aquaculture system in-situ remediation. The average concentration of COD (13.4 mg/L), TN (3.8 mg/L) and TP (0.4 mg/L) in effluent met the Class II (SC/T 9101-2007). The TP and SS were migrated into sediment driven by the self-generated electric field. According to the analysis of microbial community, electroactive bacteria such as norank_f__Anaerolineaceae, Pseudomonas, and Paraclostridium at the anode oxidized organics. Nitrogen converting bacteria enrich at the biocathode and floating bed, including Defluviimonas, Nitrospira and Bacillus, promoted the removal of nitrogen. Simultaneous nitrification and autotrophic denitrification were realized at the biocathode. The electrons generated from the anode were compensated to the cathode, forming the electron sharing network. The study presents a rewarding ecotechnology for in-situ remediation of aquaculture system.

Keywords

Environmental remediationSedimentAquacultureIn situEnvironmental engineeringWaste management

Identifiers

DOI
10.1016/j.biortech.2025.132660
PubMed
40355008
Journal
Bioresource technology
Year
2025