1. By: Jen Doak

2.  Biogas refers to the gas that is produced by the breakdown of organic matter in the presence of NO oxygen (anaerobic digester)  Produced by the anaerobic digestion of biodegradable waste such as manure, sewage, green waste, plant material.  Biogas consists mostly of methane (50%-80%) & carbon dioxide (20%-50%).  Biogas composed of 65% methane will yield about 600 Btu per cubic foot at low heat value.

3.  Organic waste is put into a sealed tank called a digester where it is heated. Without oxygen, anaerobic bacteria consume the organic matter and produce biogas and the tanks ensure capturing all the biogas.  Biogas can be produced in landfills where organic food waste degrades in anaerobic conditions.

4.  Biogas from sewage  Biogas from farms (animal waste to energy)

5.  Advantages: Renewable, methane is relatively clean burning fuel, low cost, and little impact on environment  Disadvantages: loss of the organic waste for compost or fertilizer

6.  2004, United States had 50 digesters in operation and 60 being planned  Since, the demand has continued to rise and many digesters have been created and are in planning phases  Seen in many parts of Europe

7.  Unlike natural gas, biogas is renewable  Does not take long to form  Not costly and little risks attached to biogas  Bio gas is like a cycle:

9.  http://wihresourcegroup.wordpress.com/200 9/06/25/biogas-from-sewage-and-landfills- glamorous-no-but-a-renewable-fuel-yes/ http://wihresourcegroup.wordpress.com/200 9/06/25/biogas-from-sewage-and-landfills- glamorous-no-but-a-renewable-fuel-yes/  http://www.cmlcat.com/Powered-by- Biogas.html http://www.cmlcat.com/Powered-by- Biogas.html  http://www.electrigaz.com/faq_en.htm http://www.electrigaz.com/faq_en.htm  http://www.odec.ca/projects/2007/sidd7g2/ Background.htm http://www.odec.ca/projects/2007/sidd7g2/ Background.htm  http://www.scientificamerican.com/article.cf m?id=dallas-hops-on-the-sewage-to-biogas- 2011-04 http://www.scientificamerican.com/article.cf m?id=dallas-hops-on-the-sewage-to-biogas- 2011-04