MICROBIAL FUEL CELLA FUTURE OF RENEWABLE ENERGY SOURCE FROM WASTE

Overall Mechanism

• Microbes oxidise org. matter due to which electrons and protons are released.

• Electronsflowtothecathodethroughexternalcircutproducingelectricalcurrent.

• Protonsflowthroughmembranetothecathode.• O2 (or any other electron acceptor) reactswith

electrons and protons forming water.• Anode chamber is anaerobicand there should be an

electron acceptor in cathode chamber.• We used KCl electrolyte Salt Bridge instead of

membrane.

Anode

Cathode

Microbes used in MFCs

Comparison of studies

Operating Conditions

Power generation of an MFC is affected by many factors: Microbe type Fuel biomass type and concentration Ionic strength Membrane type Ph Temperature Reactor configuration (space between electrodes)

Apparatus

Experimented Readings for Effluent water from an Pharma industry

DAY 1 DAY 2 DAY 3 DAY 4 DAY 50

2

4

6

8

10

12

VOLTAGE GENERATION (mV)

mV

Operating Conditions for Our Setup

1. Room Temperature2. Microbes already present in chemical Effluent water3. Carbon Electrodes4. Salt Bridge with KCl electrolyte instead of Proton Exchange Membrane.5. pH 6-86. Oxygen used as electron acceptor7. Later used Curd in Anode compartment containing lactobacillus

plantarum bacteria.8. No extra substrate added

Conclusion

Microbial fuel cell is a good renewable source of energy useful to meet some demands of energy in future. Though it has some limitations it will be improved in forthcoming years and by use of MFC’s alongwith other Renewable sources like Solar, Tidal, Hydro etc. we can make our energy sources cleaner and greener. By experimenting without fulfilling neccessary requirements regarding type of microbe used, mediator , substrate and Proton exchange membrane some energy is produced which shows that it can be used without any prerequirement and thus negligible operation cost Hence my project may be somehow useful in future and for us & our Mother Nature.

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