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Contact
Dr. H C Nagaraj
Principal,
Department of Civil Engineering,
Nitte Meenakshi Institute of Technology, P.O. Box 6429, Yelahanka, Bangalore 560064.
Ph: 080-22167803
E-mail: principal@nmit.ac.in

Featured Project

 

SMOG-AIR POLLUTION CONTROLLER (VYSHNAVI.P.S)
Our air gets increasingly polluted with every day that passes.  The pollution leads to health problems, diseases and death. Air pollution is an important environmental issue that needs to be addressed on a war-footing.

Sources of air pollution are natural and man-made. The natural sources include volcanic eruptions, forest fires, dust, etc.  Man-made sources include industries, automobiles, agriculture, power plants, domestic sources and others.

 

The major effects of air pollution are greenhouse effect, particulate contamination, increased UV radiation, acid rain, increased ground level ozone concentration and increased levels of nitrogen oxides.

 
SMOG-AIR POLLUTION CONTROLLER

The SMOG project reduces emission pollutants. A sensor turns on a suction fan when polluted air is detected. Polluted air is coated with nano titanium dioxide to separate nitrogen oxides. The vacuum suction fan sucks the polluted air and operates like a scrubber. A filter removes waste particles. The remaining air passes through an adsorbent which removes carbon dioxide and other volatile particles.

PROJECT PREVIEW



POTENTIAL AREAS OF APPLICATION
Industrial area
 
     

Traffic dividers
 
     

Polluted areas
 
     

POLLUTANTS SEPARATED BY THE DEVICE
  • Nitrogen oxides (NOx)-These are created during combustion. Diesel engines generally produce much larger amounts of NOx than gasoline engines due to the higher combustion temperatures.
  • Fine Particulate Matter (PM2.5)- Some of these tiny particles are formed during combustion (primary PM). Diesel engines emit far greater amounts of PM than do gasoline engines.
  • Sulphur Dioxide (SO2):-SO2 is emitted from the combustion of sulphur contained in the fuel.Most SO2 is from diesel engines as diesel has much more sulphur than gasoline.
  • Carbon Dioxide (CO2):-CO2 results from the incomplete combustion of vehicle fuels. Gasoline engines emit a higher proportion of CO than diesel engines, due to the lower combustion temperature.
  • Volatile particles: Due to incomplete combustion these particles are produced.
TECHNOLOGY
NANOTECHNOLOGY
  • Ultraviolet radiation is absorbed by the titanium dioxide which causes the photolysis of water into superoxide ions and hydroxyl radicals.
  • Nitrogen oxides react with the superoxide ions and the hydroxyl radicals to form nitrate ions.
  • The nitrate ions are absorbed into the block and form stable compounds.

VACUUM SUCTION TECHNOLOGY

The vacuum suction fan creates a vacuum and the suction mechanism creates a pressurized environment so that the air pollutants do not escape.

With the fan there are small holes that can spray limestone and water so that the fine particles and sulphur particles are separated.

FILTER TECHNOLOGY

Air purifiers can be used to filter the air contents and capture the pollutants. Air purifiers may also be used in industry to remove impurities such as CO2 from air before processing.

ADSORBER TECHNOLOGY

Activated carbon is used as an absorber with HEPA filter so that volatile particles are absorbed.

EXAMPLES OF APPLICATION
  • Pittsburgh-based aluminum giant Alcoa - The company claims that its new building coating literally eats smog, absorbs airborne pollutants and transforms them into harmless substances
  • Noxer blocks have replaced ordinary paving in around 30 towns in Japan, originally having been tested in Osaka in 1997 and can also be found underfoot in the City of Westminster (London).The noxer blocks aim to reduce these pollution levels and therefore lower the amount of photochemical smog.
 
 
 
 
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