A state of the art review on electron transfer mechanisms, characteristics, applications and recent advancements in microbial fuel cells technology

Microbial fuel cell (MFC) is an emerging technology which has been immensely investigated for wastewater treatment along with electricity generation. In the present study, the treatment efficiency of MFC was investigated for hydrocarbon containing wastewater by optimizing various parameters of MFC. Mediator‐less MFC (1·2 l) was constructed, and its performance was compared with mediated MFC with Escherichia coli as a biocatalyst. MFC with electrode having biofilm proved to be better compared with MFC inoculated with suspended cells. Analysis of increasing surface area of electrode by increasing their numbers indicated increase in COD reduction from 55 to 75%. Catholyte volume was optimized to be 750 ml. Sodium benzoate (0·721 g l–1) and actual common effluent treatment plant (CETP) wastewater as anolyte produced 0·8 and 0·6 V voltage and 89 and 50% COD reduction, respectively, when a novel consortium of four bacterial strains were used. Twenty MFC systems with the developed consortium when electrically connected in series‐parallel connection were able to generate 2·3 V and 0·5 mA current. This is the first report demonstrating the application of CETP wastewater in the MFC system, which shows potential of the system towards degradation of complex organic components present in industrial wastewater.

show abstract

“…2018; Nawaz et al . 2020). This is also evident from the steady increase in the voltage output in mediator‐less MFC system with increasing time.…”

Section: Resultsmentioning

confidence: 99%

Microbial fuel cell performance for aromatic hydrocarbon bioremediation and common effluent treatment plant wastewater treatment with bioelectricity generation through series-parallel connection

Mukherjee

Patel

Zaveri

et al. 2022

Letters in Applied Microbiology

View full text Add to dashboard Cite

show abstract

“…The oxidation potential of the mediator should be closer to the redox potential of the primary substrate. The mediator can be membrane-bound or soluble in the medium [71]. Some commonly used natural/synthetic electron mediators ferrying between inside cell membrane of bacteria and anode are Phenazine ethosulphate, 2-hydroxy-1,4-naphthoquinone, gallocyanine, benzylviologen, 2,6-dichlorophenolindophenol, antraquinone-2-disulfonate, and thionine [72].…”

Section: Electron Transfer Mechanism In Mfcsmentioning

confidence: 99%

Microbial fuel cells a state-of-the-art technology for wastewater treatment and bioelectricity generation

Mohyudin

Farooq

Jubeen

et al. 2022

Environmental Research

View full text Add to dashboard Cite

“…Electroactive bacteria strains are important for power generation in MFC devices. In order to enhance the performance of MFC, many recent studies have been focused on the chemical and genetic modifications of microorganisms [ 34 ]. Luo et al [ 35 ] reported the additional treatment of K. rhizophila bacteria with lysozyme, which accelerats electron transfer about 1.75 times.…”

Section: Introductionmentioning

confidence: 99%

Microbial Fuel Cell Based on Nitrogen-Fixing Rhizobium anhuiense Bacteria

et al. 2022

View full text Add to dashboard Cite

In this study, the nitrogen-fixing, Gram-negative soil bacteria Rhizobium anhuiense was successfully utilized as the main biocatalyst in a bacteria-based microbial fuel cell (MFC) device. This research investigates the double-chambered, H-type R. anhuiense-based MFC that was operated in modified Norris medium (pH = 7) under ambient conditions using potassium ferricyanide as an electron acceptor in the cathodic compartment. The designed MFC exhibited an open-circuit voltage (OCV) of 635 mV and a power output of 1.07 mW m−2 with its maximum power registered at 245 mV. These values were further enhanced by re-feeding the anode bath with 25 mM glucose, which has been utilized herein as the main carbon source. This substrate addition led to better performance of the constructed MFC with a power output of 2.59 mW m−2 estimated at an operating voltage of 281 mV. The R. anhuiense-based MFC was further developed by improving the charge transfer through the bacterial cell membrane by applying 2-methyl-1,4-naphthoquinone (menadione, MD) as a soluble redox mediator. The MD-mediated MFC device showed better performance, resulting in a slightly higher OCV value of 683 mV and an almost five-fold increase in power density to 4.93 mW cm−2. The influence of different concentrations of MD on the viability of R. anhuiense bacteria was investigated by estimating the optical density at 600 nm (OD600) and comparing the obtained results with the control aliquot. The results show that lower concentrations of MD, ranging from 1 to 10 μM, can be successfully used in an anode compartment in which R. anhuiense bacteria cells remain viable and act as a main biocatalyst for MFC applications.

show abstract

A state of the art review on electron transfer mechanisms, characteristics, applications and recent advancements in microbial fuel cells technology

Cited by 65 publications

References 165 publications

Microbial fuel cell performance for aromatic hydrocarbon bioremediation and common effluent treatment plant wastewater treatment with bioelectricity generation through series-parallel connection

Microbial fuel cell performance for aromatic hydrocarbon bioremediation and common effluent treatment plant wastewater treatment with bioelectricity generation through series-parallel connection

Microbial fuel cells a state-of-the-art technology for wastewater treatment and bioelectricity generation

Microbial Fuel Cell Based on Nitrogen-Fixing Rhizobium anhuiense Bacteria

Contact Info

Product

Resources

About