Usage of sewage waste to produce electricity

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 AIM/OBJECTIVE 

To produce local electricity from sewage waste. 

ABSTRACT 

Wastewater is the source of the growth of several anaerobic and facultative anaerobic bacteria. They have the ability to transfer electrons to an anode as a terminal electron acceptor and are thus classified as electrogenic bacteria. In this project, a microbial fuel cell MFC is used, that drives an electric current by using bacteria and a high energy oxidant such as Oxygen, mimicking chemical interactions found in nature. 

HYPOTHESIS 

Microbial Fuel Cell (MFC) has been described as bioreactors that convert the energy in the chemical bonds of the organic compound into electrical energy through the catalytic activity of microorganisms under anaerobic conditions. The microorganisms catalyze the anaerobic oxidation of diverse organic substance such as wastewater pollutant organic waste, organic matter in soils or sediments. The microorganisms oxidize organic compounds to CO2 with the electrode serving as the electron acceptor (Anode Respiration), thus producing electric current. 

THEORY 

A typical MFC consists of anode and cathode compartments separated by a cation (Positively charged ion) specific membrane. In the anode compartment fuel is oxidized by microorganisms generating CO2, electrons and protons. Electrons are transferred to the cathode compartment through an external electric circuit while protons are transferred to the cathode compartment through the membrane. Electrons and Protons are consumed in the cathode compartment combining with oxygen to form water. 

FUTURE SCOPE 

In the future, the wastewater from your sink, bathtub and toilet may do more than just go down the drain. It may become a source of electricity. We are trying to make the fuel cells cheaper and more efficient. Our goal is to generate enough energy to offset the cost of running a plant with plenty to spare.

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