Nitrogen removal performance of microbial fuel cell enhanced bioretention system
Yajun Wang, Rajendra Prasad Singh, Junyu Zhang, Yan Xu +1
AI summary
70% confidenceA study on the nitrogen removal performance of a microbial fuel cell enhanced bioretention system showed that the combined system achieved higher nitrogen removal efficiency compared to a traditional bioretention cell, with removal efficiencies of 64% for total nitrogen and 42.26% for ammonia.
Generated by MESSAI extraction pipeline · review against source PDF
Representative MFC — matched on the paper’s system type only, not its reactor or geometry.
Open in lab for full controls, parameter editing, and template overlays.
Open in lab →What they did
- System
- MFC
What worked
No outcome metrics extracted yet.
Abstract
Abstract Bioretention cell (BRC) and an enhanced system combining bioretention cell with microbial fuel cell (BRC-MFC) were used to treat domestic wastewater. Nitrogen removal characteristics and permeation characteristics of two systems were investigated by adjusting influent carbon/nitrogen ratio (C/N = 2–20). Results showed that nitrification and denitrification performances were mainly influenced by organic matter and system combination, which further effected the nitrogen removal. When optimal operating parameters were: electrode space of 30 cm, hydraulic load of 1.0 m³/(m²·d) and inlet/reaction time of 1/8 in BRC-MFC system, chemical oxygen demand (COD), total nitrogen (TN) and NH4+ removal efficiencies still reached 97.63, 64, and 42.26%, respectively and achieved high removal efficiency of organic matter and nitrogen simultaneously compared to the BRC system. Efficient supply of electron and phylogenetic diversity of bacterial communities in BRC-MFC process was the main reason to achieve deep denitrification removal. After the V3-V4 variable region of 16S rRNA gene was sequenced by the Miseq high-throughput sequencing method, introduction of MFC enhancement technology affected the microbial community structure in the system. The presence of MFC contributed to an increase in community diversity (from 14 to 19 phyla). The results provide a simple method without kinetic energy for simultaneous denitrification and steady infiltration of bioretention.
Key findings
- The BRC-MFC system achieved higher nitrogen removal efficiency compared to the BRC system.
- Optimal operating parameters for the BRC-MFC system included an electrode space of 30 cm, hydraulic load of 1.0 m³/(m²·d), and inlet/reaction time of 1/8.
- The introduction of electron supply and phylogenetic diversity of bacterial communities in the BRC-MFC process contributed to deep denitrification removal.
Keywords
Identifiers
- Journal
- Journal of Water Supply: Research and Technology-Aqua
- Year
- 2019