1. 
   Bio-gas
   A combustible gas (composed primarily of methane) produced when sewage or manure is fermented in the absence of oxygen. The solid material that remains in the digester after fermentation can be used as an organic fertilizer.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   Bio-gas
   A combustible gas (composed primarily of methane) produced when sewage or manure is fermented in the absence of oxygen. The solid material that remains in the digester after fermentation can be used as an organic fertilizer.
   Found op http://www.frontierassoc.net/greenaffordablehousing/tools/ChemicalTerms.sht
   
   
3. 
   bio-gas
   biogas, bio-gas 1. A mixture of methane and carbon dioxide along with traces of other gases, such as nitrogen, hydrogen, and water vapor, that is produced during anaerobic digestion. 2. A combustible gas produced by microbial activity, usually referring to methane produced by microbial fermentation...
   Found op http://www.wordinfo.info/words/index/info/view_unit/2819/12
   
   
4. 
   Biogas
   a mixture of methane (CH4) and carbon dioxide (CO2), produced by the anaerobic digestion of sludges or organic material in landfill sites; can be used to generate heat or power
   Found op http://www.oasisenviro.co.uk/Glossary%20A%20to%20B.htm
   
   
5. 
   biogas
   Biogas is a mixture of methane and carbon dioxide resulting from the anaerobic decomposition of such waste materials as domestic, industrial, and agricultural sewage. Methanogenic bacteria carry out the decomposition; these obligate anaerobes produce methane, the main component of biogas, which can ...
   Found op http://www.ktf-split.hr/periodni/en/abc/b.html
   
   
6. 
   Biogas
   Biogas is generated when bacteria degrades biological material in the absence of oxygen, in a process known as anaerobic digestion. Since biogas is a mixture of methane (also known as marsh gas or natural gas) and carbon dioxide it is a renewable fuel produced from waste treatment.
   Found op http://www.energ.co.uk/Glossary
   
   
7. 
   Biogas
   Biogas is generated when bacteria degrades biological material in the absence of oxygen, in a process known as anaerobic digestion. Since biogas is a mixture of methane (also known as marsh gas or natural gas) and carbon dioxide it is a renewable fuel produced from waste treatment.
   Found op http://www.energ.co.uk/Glossary
   
   
8. 
   biogas
   A gas that is produced through anaerobic respiration, itcontains mostly methane and carbon dioxide with small amounts of watervapor, nitrogen, hydrogen, or other gases. ... (09 Oct 1997) ...
   Found op http://www.mondofacto.com/facts/dictionary?biogas
   
   
9. 
   biogas
   biogas, bio-gas 1. A mixture of methane and carbon dioxide along with traces of other gases, such as nitrogen, hydrogen, and water vapor, that is produced during anaerobic digestion. 2. A combustible gas produced by microbial activity, usually referring to methane produced by microbial fermentation...
   Found op http://www.wordinfo.info/words/index/info/view_unit/2819/12
   
   
10. 
    Biogas
    Biogas typically refers to a gas produced by the biological breakdown of organic matter in the absence of oxygen. Organic waste such as dead plant and animal material, animal feces, and kitchen waste can be converted into a gaseous fuel called biogas. Biogas originates from biogenic material and is...
    Found op http://en.wikipedia.org/wiki/Biogas
    
    
11. 
    biogas
    Biogas plant in India A combustible gas created by anaerobic decomposition, or fermentation, of organic material (including animal dung, human sewage, crop residues, and industrial and municipal wastes). It is composed primarily of methane (the combustible component), carbon dioxide, and ...
    Found op http://www.daviddarling.info/encyclopedia/B/AE_biogas.html
    
    
12. 
    biogas
    landfill gas and sewage gas, also called biomass gas.
    Found op http://en.wikipedia.org/wiki/Glossary_of_environmental_science
    
    
13. 
    biogenic gas
    (from the article `climate`) Biogenic gases are gases critical for, and produced by, living organisms. In the contemporary atmosphere, they include oxygen, nitrogen, water ... Biogenic gases in the atmosphere play a role in the dynamics of Earth`s planetary radiation budget, the thermodynamics of th...
    Found op http://www.britannica.com/eb/a-z/b/66
    
    

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