POWER PRODUCTION FROM OILY WASTE

INTRODUCTIONseveral million tons of oil soils the world's seas every year

The metabolism of microorganisms is capable of breaking down hydrocarbons in crude oil.

Microbes are tiny living things—so tiny that you need a microscope to see them. Yet unseen microbes have a collective mass greater than all the animals on the planet. They're everywhere!

OUTLOOKAlcanivorax, Marinobacter, Pseudomonas, and Acinetobacter are some of the bacteria found to degrade oil .

As oil contains organic pollutants which can be used to produce electricity, hydrogen and high-value chemicals, such as caustic soda

This can be achieved if the organic matter is broken down by electrically-active bacteria in an electrochemical cell, which, at the same time, helps clean up the wastewater.

COW DUNGCow dung has considerable potential for biodegradation and biotransformation of petroleum product.

The predominate species identified were Bacillus, Psuedomonas, Proteus spp.

The maximum degradation of petroleum was at incubation temperature 37oC, pH 7 and xylene as substrate. Among the isolated bacteria Psuedomonas spp. was found to give maximum activity.

CONSTRUCTION Anode compartment : carbon electrode dipped in solution containing cow dung and oily waste . cathode compartment: carbon electrode dipped in water salt bridge: prepared by using agar agar and Nacl.

Anode(Carbon electrode)

Cathode(Carbon electrode)

Cow dung+Oily waste

Salt bridge

water

COMMON SETUP

WORKING:AT ANODE, Bacteria, break down organic material, as found in wastewater, at the anode under anaerobic (without oxygen) conditions.

When breaking down the organic material, the bacteria release electrons (negatively charged particles), protons (positively charged hydrogen ions) and carbon dioxide into solution. The anode collects the electrons, which then travel to the cathode via an external circuit (i.e. an electric current can flow).

AT CATHODEelectricity is produced by extracting it from the electron-carrying external circuit. The electrons arriving at the cathode under aerobic conditions, i.e. in the presence of oxygen, combine with the protons and oxygen, typically from the air, to form wate

The H+ ion react with react with negatively charged electron to form hydrogen .

CHALLENGESone of the big challenges is to improve the performance of the bacteria and the electrodes so that ‘electron transfer’ can be enhanced. This would lead to greater production of electricity, hydrogen or other chemicals. 1) Direct electron transfer between the bacteria and the electrode can occur in two ways: 2) Indirect transfer of electrons from the bacteria to an electrode occurs via long-range electron shuttle compounds

ADVANTAGESIt is a One time investment process.Decompose of waste to form usefull materials

Pollution free.Production of hydrogen .Large amount of energy is not required..

FUTURE EXPERIMENTS

Production of bio gasProduction of caustic soda Increase of surface area of electrodes

BY santosh. M Deepak raj .B

Project guide : Dr . Chitradevi ,kEC

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