Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Electrotrophic denitrification is a promising novel nitrogen removal technique. In this study, the performance and the mechanism of electrotrophic denitrification coupled with sulfate-sulfide cycle were investigated under different anodic influent COD/SO ratios. The results showed that electrotrophic denitrification contributed to more than 22% total nitrogen removal in cathode chamber. Higher COD/SO ratios would deteriorate the sulfate reduction but enhance methane production. Further mass balance indicated that the electron flow utilized by methanogenic archaea (MA) increased while that utilized by sulfate-reducing bacteria (SRB) decreased as the COD/SO ratio increased from 0.44 to 1.11. However, higher COD/SO ratios would produce more electrons to strengthen electrotrophic denitrification. Microbial community analysis showed that the biocathode was predominantly covered by Thiobacillus that encoded with narG gene. These findings collectively suggest that electrotrophic denitrification could be a sustainable approach to simultaneously remove COD and nitrogen under suitable COD/SO ratio based on sulfur cycle in wastewater.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2021.132149 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Achieving synchronous nitrogen and phosphorus removal by aerobic enrichment of electrotrophic/heterotrophic bacteria and denitrifying polyphosphate-accumulating organisms in repeatedly oxygen-rich microbial fuel cells.
Bioresour Technol
May 2025
MARA Key Laboratory of Development and Application of Rural Renewable Energy, Sichuan Institute of Rural Human Settlements, Biogas Institute of Ministry of Agriculture and Rural Affairs (BIOMA), Chengdu 610041, China; Research Center for Rural Energy and Ecology, Chinese Agricultural Academy of Scie
Realizing the enrichment of functional bacteria in microbial fuel cells (MFCs) for wastewater treatment holds substantial research significance. This study explored a novel method of repeatedly oxygen-rich anode environment to enrich electrotrophic/heterotrophic bacteria (EHB) and denitrifying polyphosphate-accumulating organisms (DPAOs) in membrane-less single-chamber air-cathode (AC) MFCs to treat household wastewater. Repeated accumulation of higher dissolved oxygen (DO) was conducive to enhancing the growth of EHB and DPAOs.
View Article and Find Full Text PDFInorganic bioelectric system for nitrate removal with low NO production at cold temperatures of 4 and 10 °C.
Water Res
April 2025
Department of Environmental and Resource Engineering, Technical University of Denmark, Bygningstorvet, Bygning 115, 2800 Kgs, Lyngby, Denmark. Electronic address:
Groundwater, essential for ecological stability and freshwater supply, faces escalating nitrate contamination. Traditional biological methods struggle with organic carbon scarcity and low temperatures, leading to an urgent need to explore efficient approaches for groundwater remediation. In this work, we proposed an inorganic bioelectric system designed to confront these challenges.
View Article and Find Full Text PDFEfficient enriching high-performance denitrifiers using bio-cathode of microbial fuel cells.
iScience
October 2024
Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi Province 712100, China.
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 -N removal efficiency of 69.99 ± 0.
View Article and Find Full Text PDFCalcined pyrite accelerates sulfur metabolic and electron transfer in driving targeted microbial fuel cell denitrification.
Bioresour Technol
October 2024
Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, No.2 Linggong Road, Dalian 116024, PR China. Electronic address:
The sulfur powder as electron donor in driving dual-chamber microbial fuel cell denitrification (S) process has the advantages in economy and pollution-free to treat nitrate-contained groundwater. However, the low efficiency of electron utilization in sulfur oxidation (ACE) is the bottleneck to this method. In this study, the addition of calcined pyrite to the S system (SCP) accelerated electron generation and intra/extracellular transfer efficiency, thereby improving ACE and denitrification performance.
View Article and Find Full Text PDFGranular activated carbon assisted biocathode for effective electrotrophic denitrification in microbial fuel cells.
Chemosphere
March 2024
Department of Biological Environment, Kangwon National University, 192-1 Hyoja-dong, Chuncheon-Si, Gangwon-Do, 24341, Republic of Korea. Electronic address:
Granular activated carbon (GAC) has been widely used at the anode of a microbial fuel cell (MFC) to enhance anode performance due to its outstanding capacitance property. To the best of our knowledge, there haven't been any studies on GAC in the cathode for biofilm development and nitrate reduction in MFC. In this study, by adding GAC to biocathode, we investigated the impact of different GAC amounts and stirring speeds on power generation and nitrate reduction rate in MFC.
View Article and Find Full Text PDF