Biogas digester overview

1. Biogas DigestersBy Bryce Dinger

2. Copying Nature to Produce Energy

3. Barriers to Biogas
Inadequate payback/economics
Operations and maintenance
complications and concerns
Digester heating costs
Lack of education

4. What is Biogas?
 Biogas is created when bacteria degrade
biological material in an anaerobic state, or the
absence of oxygen
 Biogas is a clean fuel produced from anaerobic
digestion
 Biogas is comprised of 55-65% methane, 35-45%
carbon dioxide, 0.5-1.0% hydrogen sulfide and
other traces of water vapor
 Biogas is corrosive in nature making it difficult to
store

5. Why Biogas?
By harnessing biogas, various types of
energy can be produced
 Power has become a major concern in
rural regions of third world countries
Sanitation problems exist in every
population, and digesters offer a
healthy solution

6. Biogas Production
4 stages within process
1.Liquefaction
2.Acid production
3.Acetate Production
4.Methane Production

7. A more practical example
https://www.researchgate.net/profile/Charlotte_Rennuit/publication/272647066/figure/fig1/Figure-1-Schematic-diagram-of-the-simple-unheated-biogas-digester-The-diluted-manure.png