Biogas: Difference between revisions
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(Created page with "''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 ...") |
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== Challenges == | == Challenges == | ||
Biogas production can be problematic in temperate climates: low temperatures may lead to breakdown of microbial populations. | 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 | 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). | ||
[[File:Cooking_with_biogas.jpg|300px|thumb|right|Cooking with biogas]] | [[File:Cooking_with_biogas.jpg|300px|thumb|right|Cooking with biogas]] | ||
[[File:Construction_of_digester.jpg|300px|thumb|right|Cooking with biogas]] | [[File:Construction_of_digester.jpg|300px|thumb|right|Cooking with biogas]] | ||
== Applications and Product Ecology == | == Applications and Product Ecology == | ||
Revision as of 15:22, 15 January 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
- direct reduced iron
- 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
External Links
- Appropedia Category: Biogas
- Wikipedia: Biogas