Microorganisms in sediment microbial fuel cells: Ecological niche, microbial response, and environmental function

Area of Science:

• Environmental Science
• Microbiology
• Electrochemistry

Background:

• Sediment microbial fuel cells (SMFCs) are devices that generate electrical energy from organic-rich sediments.
• SMFCs are increasingly recognized for their potential in environmental remediation due to their ability to provide sustainable electron donors/acceptors.
• Microorganisms in sediments and overlying water are critical to SMFC performance.

Purpose of the Study:

• To provide a comprehensive overview of microorganisms within SMFCs.
• To summarize anodic and cathodic niches for microbes in SMFCs.
• To discuss microbial community interactions with the SMFC environment.

Main Methods:

• Literature review focusing on microbial roles in SMFCs.
• Analysis of microbial population and community dynamics in relation to SMFC conditions.
• Proposal of a novel microbial succession strategy: electrode stimulation succession.

Main Results:

• Detailed summary of microbial niches (anodic/cathodic) in SMFCs.
• Discussion on the complex interactions between microbial communities and the open SMFC environment.
• Introduction of the electrode stimulation succession concept for managing microbial communities.

Conclusions:

• Microorganisms are central to SMFC function and environmental applications.
• Further research into electrode stimulation succession, environmental functions, and electron transfer is needed.
• Optimizing understanding of microbial dynamics will enhance SMFC applications for power generation and remediation.