Abstract
The microbial fuel cell (MFC) is a promising environmental biotechnology that has been proposed mainly for power production and wastewater treatment. Though small power output constrains its application for directly operating most electrical devices, great progress in its chemical, electrochemical, and microbiological aspects has expanded the applications of MFCs into other areas such as the generation of chemicals (e.g., formate or methane), bioremediation of contaminated soils, water desalination, and biosensors. In recent decades, MFC-based biosensors have drawn increasing attention because of their simplicity and sustainability, with applications ranging from the monitoring of water quality (e.g., biochemical oxygen demand (BOD), toxicants) to the detection of air quality (e.g., carbon monoxide, formaldehyde). In this review, we summarize the status quo of MFC-based biosensors, putting emphasis on BOD and toxicity detection. Furthermore, this review covers other applications of MFC-based biosensors, such as DO and microbial activity. Further, challenges and prospects of MFC-based biosensors are briefly discussed.
Highlights
Sensors can detect the properties and events occurring around and convert the sensed information into signals [1]
microbial fuel cell (MFC)-based biosensor expected to this review, we summarize status quo signal of MFC-based biosensors, focusingison
The presence of other electron acceptors in the anodic chamber, such as nitrate and oxygen, The presence of other electron acceptors in the anodic chamber, such as nitrate and oxygen, was was found to reduce the current output of an MFC because they competed with anode for found to reduce the current output of an MFC because they competed with anode for the the electrons from biofilm [58]
Summary
Sensors can detect the properties and events occurring around and convert the sensed information into signals [1]. Based biosensors inherit the common problems of MFCs, such as stability, reproducibility of the protons and otherand cations (e.g., Na+ , K+ ) migrate to the cathode through the IEM to keep signal, long-term operation substrate-induced metabolic cross-effects. MFC-based biosensors electron flow rate, which is transduced into a measurable signal [19]. MFC-based biosensor is focus on the betweenapplications the signal output (e.g., voltage, current) and changes in expected to be one ofrelationship the most promising of MFC-derived technologies, which has been environmental conditions other than high power output [18]. The most Other promising applications of MFC-derived technologies, which been studied to toxicity applications of MFC-based biosensors, such as DO andhas microbial activity, measure various parameters, including biochemical oxygen demand (BOD), chemical oxygen demand are briefly addressed.
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