Any
organic waste from urban and rural areas and industries is a resource due to
its ability to get degraded resulting in energy generation.Waste
can be processed through any of the following technological options, which can
be categorized into thermal or biological conversion resulting in energy generation.
The technologies for energy generation from solid wastes are multiple.
?
Pelletisation/briquetting
For liquid wastes, such as
sewage and effluents from industries, anaerobic digestion is the suitable technological
option for recovery of energy.
The
process of anaerobic
digestion and landfill results in biogas production from organic
waste. Biogas is a mixture of methane and carbon dioxide. Methane?discovered in 1776 by
Alessandro Volta, an Italian physicist?is highly inflammable. The calorific
value of methane is 13157.89 KCal/kg. This process of methane generation, ie,
biomethanation, is an effective tool to dig out the wealth from waste with high
moisture content. But for dry waste, the best technique is the production of refuse derived fuel
pellets through pelletization that can be burned directly for thermal
application or power generation.
There
is a huge energy generation potential associated with the solid and liquid
wastes.
A. Waste generation trends in India
Year
|
Per capita waste
generation (g/day)
|
Total urban municipal
waste generation (MT/ yr)
|
1971
|
375
|
14.9
|
1981
|
430
|
25.1
|
1991
|
460
|
43.5
|
1997
|
490
|
48.5
|
2025
|
700
|
Double the amt. of
1997
|
B. Potential of power generation
Urban and municipal wastes 1000 MW
Industrial wastes 700 MW
(dairy, distillery, tannery,
pulp and paper,
and food processing
industry)
Total
1700
MW
Related websites
www.ows.be/dranco.htm
www.kompogas.ch/en.The_kompogas_process/the_ kompogas_process.html
www.undp.org.in/programme/GEF/dec%2002/deci2/article-3.htm
http://static.teriin.org/case/team.htm
http://www.indiawteplan.com/
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