Publicação
Microbial fuel cells integrated in constructed wetlands: systematic review on current status, challenges, and opportunities
| dc.contributor.author | Ojediran, Adetunji | |
| dc.contributor.author | Carrillo, Valentina | |
| dc.contributor.author | Pereira, Sofia Isabel Almeida | |
| dc.contributor.author | Rosa-Santos, Paulo | |
| dc.contributor.author | Rodrigues, Ana Cristina | |
| dc.contributor.author | Calheiros, Cristina Sousa Coutinho | |
| dc.date.accessioned | 2026-08-06T15:24:24Z | |
| dc.date.available | 2026-08-06T15:24:24Z | |
| dc.date.issued | 2026-07-14 | |
| dc.description.abstract | Introduction: Constructed wetlands (CWs) are widely applied as low energy, nature-based wastewater treatment systems, particularly in decentralized contexts, while microbial fuel cells (MFCs) are increasingly being investigated to recover energy through bioelectrochemical processes that are favored by the redox gradients present within CWs. The integration of these two sustainable solutions is gaining increasing attention due to its potential to generate synergistic benefits. However, despite the growing number of studies on CWMFC systems, there still remains a lack of consolidated synthesis regarding system design, performance outcomes, and intensification strategies (approaches that enhance process efficiency by accelerating reaction rates, improving electron transport, and maintaining redox stratification for stable system operation). Consequently, several critical knowledge gaps persist, including limited reporting on long-term stability and durability, insufficient economic assessments, lack of standardized design and performance metrics, and underrepresentation of microbial community structure and function.Methodology: This review covers CW-MFC studies published between 2010 and 2026 across several regions of the world and includes laboratory, mesocosm, pilot, and full-scale systems, focusing on system design, operational strategies, microbial processes, treatment, and energy recovery performance.Results: Most CW-MFC studies are at laboratory and pilot scale, with limited full-scale applications, and their performance depends primarily on reactor and flow regime configurations, electrode materials and their positioning, substrate type, and redox gradient profile. Many studies have reported encouraging Chemical Oxygen Demand (COD) and nutrient removal efficiencies, with values reaching up to 99% COD removal, 95% Total Phosphorus (TP) removal, and 100% ammonium-nitrogen (NH4 +-N) removal. CW-MFC systems generally improve organic matter and nutrient removal compared to conventional CWs; however, the electrical energy recovered is typically low and tends to decrease with increasing system scale.Discussion: Overall, CW-MFC systems are best regarded as sustainable, multifunctional wastewater treatment technologies rather than primary energy recovery systems, as their practical feasibility is more constrained by long-term stability, material durability, and insufficient economic reporting rather than by treatment performance. | eng |
| dc.identifier.doi | 10.3389/fenvs.2026.1884215 | |
| dc.identifier.eid | 105046541063 | |
| dc.identifier.other | 7aa2a1aa-4bfc-443c-9f55-4bbffb3da15c | |
| dc.identifier.uri | http://hdl.handle.net/10400.14/59029 | |
| dc.identifier.wos | 001833926400001 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | Frontiers Media SA | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | Constructed wetlands | eng |
| dc.subject | Energy recovery | eng |
| dc.subject | Full-scale systems | eng |
| dc.subject | Microbial fuel cells | eng |
| dc.subject | Wastewater treatment | eng |
| dc.title | Microbial fuel cells integrated in constructed wetlands: systematic review on current status, challenges, and opportunities | |
| dc.type | review article | |
| dspace.entity.type | Publication | |
| oaire.citation.volume | 14 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 |
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