19.2 Microbial Fuel Cell Components and Process

307

Figure 19.2

Schematic

representation of single chambered

microbial fuel cell.

Electrical circuit (R)

Treated water

Wastewater

Anode

Anode chamber

e^–

e^–

H⁺

Membrane

Cathode

Table 19.2

Microbes used in MFC.

Microorganisms

Note

Electricity-producing bacteria with mediator

Klebsiella pneumoniae

HNQ as mediator

Proteus mirabilis

Thionin as mediator

Gluconobacter oxydans

Mediator (HNQ, resazurin, or thionine)

needed

Desulfovibrio desulfuricans

Sulfate/sulfide as mediator

Streptococcus lactis

Ferric chelate complex as mediators

Proteus mirabilis

Thionin as mediator

Escherichia coli

Mediators such as methylene blue

needed

Actinobacillus succinogenes

Neutral red or thionin as electron

mediator

Electricity-producing bacteria without mediator

Desulfuromonas acetoxidans

Deltaproteobacteria identified from a

sediment MFC

Geobacter sulfurreducens

Generated current without poised

electrode

Aeromonas hydrophila

Deltaproteobacteria

Pichia anomala

Current generation by yeast (kingdom

Fungi)

Acidiphilium sp. 3.2 Sup5 power

Production at low pH

Thermincola sp. strain JR

Phylum Firmicutes

Desulfobulbus propionicus

Deltaproteobacteria