Talk:Biofuel

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Added info[edit]

Pure (compressed) methane wasn't described, so I changed the biogas section to: ====Biogas and methane==== [[Image:Biogas pipes.JPG|right|thumb|150px|Pipes carrying biogas]] {{Main|Biogas}} Biogas is a gas produced by the process of [[anaerobic digestion]] of [[organic material]] by [[anaerobe]]s.<ref>Redman, G., The Andersons Centre. [http://www.nnfcc.co.uk/metadot/index.pl?id=7198;isa=DBRow;op=show;dbview_id=2457 "Assessment of on-farm AD in the UK"], ''[[National Non-Food Crops Centre]]'', 2008-06-09. Retrieved on 2009-05-11.</ref> Methane is a purer gas (biogas being composed of methane and CO<sub>2</sub> and thus energy denser.<ref>[http://journeytoforever.org/biofuel_library/MethaneDigesters/MD4.html Using methane for transport purposes]</ref> Both can be produced either from [[biodegradable waste]] materials or by the use of [[energy crop]]s fed into [[anaerobic digester]]s to supplement gas yields. The solid byproduct, [[digestate]], can be used as a biofuel or a fertilizer. One disadvantage of both fuels however is that they need to be compressed in order to be useful as a vehicle fuel (not needed for stationary applications). The compression itself however generally also requires allot of energy. * Biogas can be recovered from [[mechanical biological treatment]] waste processing systems. :Note:[[Landfill gas]] is a less clean form of biogas which is produced in [[landfill]]s through naturally occurring anaerobic digestion. If it escapes into the atmosphere it is a potential [[greenhouse gas]]. * Farmers can produce biogas and methane from [[manure]] from their cows by using an anaerobic digester (AD).<ref>"BIOGAS: No bull, manure can power your farm." Farmers Guardian (September 25, 2009): 12. General OneFile. Gale.</ref>

possible image problem[edit]

I have in the past tried to remove this image but was reverted because I didn't explain myself clearly. My main concerns are as follows:
1. This image is old (2007), and prices fluctuate wildly from year to year.
2. The price of biodiesel may or may not be artificially deflated due to government subsidies. This means that comparing biodiesel to conventional diesel is not entirely fair. Brian Everlasting (talk) 18:35, 18 June 2015 (UTC)

In some countries, biodiesel is less expensive than conventional diesel.