Biogas: Difference between revisions
Jump to navigation
Jump to search
mNo edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
{{Category=Biofuel}} | |||
''We badly need a '''main page''' on biogas, please help write intro here. | ''We badly need a '''main page''' on biogas, please help write intro here. | ||
| Line 29: | Line 30: | ||
* [http://www.appropedia.org/Biogas_and_liquid_biofuels Appropedia main biogas page] | * [http://www.appropedia.org/Biogas_and_liquid_biofuels Appropedia main biogas page] | ||
* Wikipedia: [http://en.wikipedia.org/wiki/Biogas Biogas] | * Wikipedia: [http://en.wikipedia.org/wiki/Biogas Biogas] | ||
Revision as of 18:49, 15 February 2011
We badly need a main page on biogas, please help write intro here.
Only existing page we have: http://openfarmtech.org/wiki/Biogas_start_up
Challenges
Biogas production can be problematic in temperate climates: low temperatures may lead to breakdown of microbial populations. This can potentially be overcome with insulation or earth sheltering.
Biogas can be dirty (high sulfur content etc.) Use of biogas: when used for combustion, no upgrading necessary. When intended use is internal combustion engine (transportation), biogas may need to be upgraded (cleaned).
Applications and Product Ecology
- biogas for cooking, heating
- Guastavino masonry or plain CEBs to build biogas digester and holding tank for stored biogas. One holding tank could be used for the storage of biogas and compressed fuel gas
- methane for the production of direct reduced iron from rust or high-grade iron ore
- compressed biogas for transportation / internal combustion engine
- liquid slurry from biogas tank can be used to fertilize duckweed pond
- solid contents coming out of digester can be composted (vermicompost, BSF compost, biochar compost)
- when biogas is burned inside a greenhouse, the CO2 enrichment can provide a boost to plant growth (CO2 concentrations up to 1500ppm needed). This is effect widely used by commercial growers, but unfortunately they are using mostly fossil methane.
- various uses in metallurgy
- process bulky biomass before it can go into a digester, using hammer mill