Work

Efficient enriching high-performance denitrifiers using bio-cathode of microbial fuel cells

Year: 2024

Type: article

Abstract: Recent advancements in microbial fuel cells (MFC) technology have significantly contributed to the development of bio-cathode denitrification as a promising method for eco-friendly wastewater treatment. This study utilized an efficient repeated replacement method to enrich a mixed bio-cathode denitrifying culture (MBD) within a bio-cathode MFC, achieving a stable maximum output voltage of 120 ± 5 mV and a NO 3 − -N removal efficiency of 69.99 ± 0.60%. The electrotrophic denitrification process appears to be facilitated by electron shuttles. Microbial community analysis revealed a predominance of Proteobacteria , with Paracoccus and Pseudomonas as functional genera. Additionally, the isolated strain Lyy (belonging to Stutzerimonas ) from MBD demonstrated exceptional denitrification efficiencies exceeding 98% when treating wastewater with a broad range of C/N (2–12) ratios and KNO 3 concentrations (500–3000 mg/L) within 60 h. These results demonstrated the effectiveness of the repeated replacement method in enriching bio-cathode denitrifiers and advancing MFC application in sustainable wastewater management.

Source: iScience

DOI: 10.1016/j.isci.2024.110965

Authors: Ruitao Li, Xiang-peng Ren, Xinxin Fan, Zhen Zhang, Tian-peng Gao, Ying Liu

Institutions: Northwest A&F University, Xi’an University, Lanzhou City University

Language: English

Topic: Microbial Fuel Cells and Bioremediation

Subfield: Environmental Engineering

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Affordable and clean energy, Responsible consumption and production

Open Access status: gold

Estimated APC paid: $3,150