Microbial fuel cell advanced
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Microbial Fuel cell By Sagar Divetiya 110990135013 Environmental Science & Technology 4 th sem
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Microbial fuel cells are newest technological advancement in conventional fuel cell technology. Treatment of wastewater is coupled with electricity generation. Hydrogen production is also possible by modifying MFC technology. It is a independent essential review of Microbial fuel cell technology.
Transcript of Microbial fuel cell advanced
Microbial Fuel cellBy Sagar Divetiya
110990135013Environmental Science & Technology
4th sem
08/04/2023 09:49 AMComposed by : Sagar Divetiya 2
1) Perquisitesa) Electrochemical cellb) Fuel cells
2) Microbial Fuel cell (MFC)a) Definition, meaning & Principleb) Basic Designc) Components & Working
3) Types of MFC4) Applications of MFC5) Advantages & limitations6) Future & facts
Outline
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Perquisites
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Electrochemical cell
A simple voltaic cell
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“ A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent ”
What are fuel cells ?
Fuel
Fuel cell
Energy
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Hydrogen fuel cell - Famous
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Applications of Hydrogen fuel cell
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Microbial fuel cells(MFCs)
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MFCs are still taking baby steps.
If Fuel cells are new technology for us then MFCs are newest.
A very few people are working on it.
Knowledge of Microbiology, Biochemistry, Material science, Environmental Engineering, etc. required to understand & improve this technology.
Facts
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“ A microbial fuel cell is a device that converts chemical energy to electrical energy by the catalytic reaction of microorganisms. ”
Definition
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“ A microbial fuel cell (MFC) or biological fuel cell is a bio-electrochemical system that drives a current by mimicking bacterial interactions found in nature. ”
Meaning
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“ MFCs are bioelectrical devices that harness the natural metabolisms of microbes to produce electrical power directly from organic material. ”
Principle
Why we eat food ?
To produce energy , gain vitamin , protein etc. This is our metabolism
Microbes exactly do the same, they eat organic material then produce energy for themselves.
This is the metabolism of microbe.
But some of microbes (bacteria) liberate electrons during their metabolic activity.
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Primary Flow diagram
FuelMicrobial Fuel Cell
Energy
Glucose(Organic material)
Fuel cell
Basic Design
Oxygen Poor
Oxygen Rich
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Anodic Reaction (Oxidation)◦ EX-1 : CH3COO - + 2H2O 2CO2 + 7H+ + 8e-
(Acetic acid ion)
◦ EX-2 : C6H12O6 + 6H2O 6CO2 + 24H+ + 24e-
(glucose)
Cathodic Reaction (Reduction)◦ EX-1 : O2 + 4H+ + 4e- 2H2O
◦ EX-2 : 6O2 + 24H+ + 24e- 12H2O
Redox Reactions invovled
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Various things like glucose, acetate etc.
Can be Obtained from Wastewater & solid waste especially domestic.
Organic material as fuel
Various Microbes used in MFCs
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Types of MFCs based on Mechanisms
Mediator MFC
Mediator-Free MFC
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Other types based on Constructional features
Research type MFCs
Continuous MFCs
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Some Application Based on MFC
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Treatment of Wastewater & solid wastes
◦ BOD removal
Used to measure strength of wastewater
◦ Biosensor ( Principle: Voltage is proportional to organic material)
Electrical Power Generation
Bio-hydrogen
Applications
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Wider variety of applications over conventional fuel cells.
Can be used to solve Environmental Problems Wastewater treatment & power generation at a same
time. Good alternative to Conventional Power Generation
Systems.
Advantages
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Limit on surface area of anode as bacteria can clog small pores and hence limit on current.
Still not economically competitive.
Power produced way below when compared with conventional cells.
Very slow performance in wastewater treatment.
Limitations
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Future
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“Love your Environment”, only way to save it
Thank you…
