manoj(12mba006) thermal pollution

7/18/2019 Manoj(12MBA006) Thermal Pollution

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“THERMAL POLLUTION”

By

Manoj Bhalani(12MBA006)



Objective

• To know what is Thermal pollution

• To identified reason of Thermal Pollution and

its sources• To measurement effect of Thermal Pollution

on environment.

•

To find effective control tools and step fordecrease Thermal pollution.



What is Thermal Pollution?

• Increase in the normal temperatures of

natural waters caused by intervention of

human activities.

• Temperature is a physical characteristic of

water which is regulated under the Water Act

1974.



Thermal Pollution



Major Causes

• Nuclear Power Plants

• Deforestation

•

Industrial Effluents• Coal Fired Power

Plants



Nuclear Power Plants

• Nuclear power plants use water as a cooling

agent.

• After the water is used, it is put back into a

water supply at 9-20oC warmer



This 1988 thermal image of the

Hudson River highlights

temperature changes caused by

discharge of 2.5 billion gallons ofwater each day from the Indian

Point power plant. The plant sits in

the upper right of the photo — hot

water in the discharge canal isvisible in yellow and red, spreading

and cooling across the entire width

of the river. Two additional outflows

from the Lovett coal-fired power

plant are also clearly visible against

the natural temperature of the

water, in green and blue.



Deforestation

Plant roots hold soil particles together. Hence

the deforestation results erosion of soil

particles.

Vegetation provides shade to the water

surface. Deforestation increases the amount

of light hitting the water surface, thereby

raising the water temperature.



Coal-fired Power Plants

Coal is utilized as a fuel

Condenser coils are cooled with

water from nearby lake or river The heated effluents decrease

the DO(dissolved oxygen) of water

Damages the marine organisms



Industrial Waste Water

Discharged water from steam-electric power industry

using turbo generators will have a higher temperature

ranging from 6 to 9˚C than the receiving water



Effects of Increased Water

Temperature

• Thermal shock – aquatic life adapted to a certain

water temperature can go into shock when the

temperature is changed even 1 or 2 degrees.

• Dissolved oxygen in water decreases• Increases the rate of photosynthesis, which increases

the amount of plant growth



Dissolved Oxygen v/s Temperature



Control Of Thermal Pollution

Cooling Ponds,Man-made bodies of water designed for coolingby evaporation, convection, and radiation

Cooling Towers

Which transfer waste heat to

the atmosphere through evaporation and heattransfer

Re-use and Recycle

A process where waste heat is recycled for domesticand industrial heating purposes



References• http://thermal.unl.edu/dm

• www.thermaleffects.com

• http://ojs.library.unsw.edu.au/index.php/wetl

ands/article/viewFile/155/168 • https://tspace.library.utoronto.ca/bitstream/1

807/9111/1/st05003.pdf

• http://thermalpollution.usda.edu/dt

http://www.thermaleffects.com/

http://ojs.library.unsw.edu.au/index.php/wetlands/article/viewFile/155/168




http://www.thermaleffects.com/

manoj(12mba006) thermal pollution

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