Biogas: Difference between revisions
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* biogas for cooking, heating | * biogas for cooking, heating | ||
* [http://openfarmtech.org/wiki/CEB_Vaults 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 [http://openfarmtech.org/wiki/Compressed_Fuel_Gas compressed fuel gas] | * [http://openfarmtech.org/wiki/CEB_Vaults 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 [http://openfarmtech.org/wiki/Compressed_Fuel_Gas compressed fuel gas] | ||
* [http://openfarmtech.org/wiki/Direct_Reduced_Iron_(DRI) direct reduced iron] | * methane for the production of [http://openfarmtech.org/wiki/Direct_Reduced_Iron_(DRI) direct reduced iron] from rust or high-grade iron ore | ||
* compressed biogas for transportation / internal combustion engine | * compressed biogas for transportation / internal combustion engine | ||
* liquid slurry from biogas tank can be used to fertilize [[duckweed]] pond | * liquid slurry from biogas tank can be used to fertilize [[duckweed]] pond | ||
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* various uses in [http://openfarmtech.org/wiki/Category:Metalworks metallurgy] | * various uses in [http://openfarmtech.org/wiki/Category:Metalworks metallurgy] | ||
* process bulky biomass before it can go into a digester, using [[hammer mill]] | * process bulky biomass before it can go into a digester, using [[hammer mill]] | ||
* | * | ||
== External Links == | == External Links == | ||
Revision as of 15:54, 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. 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
External Links
- Appropedia Category: Biogas
- Wikipedia: Biogas