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If sewers' potential were realised as source of biogas, and if all animal wastes were fed through a methane digester instead of becoming toxic lakes, then we wouldn't have to import so much bloody gas in the first place.

'The history of public debt is full of irony. It rarely follows our ideas of order and justice.' Thomas Piketty
by melo (melometa4(at)gmail.com) on Wed Aug 9th, 2017 at 09:15:26 PM EST
[ Parent ]
Those things certainly help, but I've heard several times that biogas projects tend to be far more useful and effective as waste disposal/climate remediation projects than they are for actual utility scale power generation. Then again, I am Not an Expert.
by Zwackus on Fri Aug 11th, 2017 at 04:12:28 AM EST
[ Parent ]
In Sweden, we burn biomass - including waste - for energy and use some of the gas to run busses.

Checking Wikipedia, municipal waste is around 7% of biofuel. Biogas from sorted organic waste is a smallish portion of that. Biofuels in Sweden is dominated by wood and waste from the wood industry. Biofuels in total is quoted as 32% of total energy use (don't know how they count that, but lets assume they are fairly on the mark).

That lands below one percent of total energy use. Enough for a niche (we run some busses on biogas), but not enough for gas niche of load balancing (I think).

Then again, Sweden is cold and uses a lot of energy, is sparsely populated and has a ton of woods, so I don't know how much that affects the numbers.

I think it's worth doing, and recycling gets rid of landfills, even if it's unlikely to replace gas in the short run.

by fjallstrom on Fri Aug 11th, 2017 at 09:34:09 AM EST
[ Parent ]
Are you referring to those plants that burn landfill material at such high heat that there is no rain of dioxin falling on nearby inhabitants?

I was thinking more about creating field-ready slurry with biogas as side benefit.

replace gas in the short run.

Replace the current 'needs' never, but help in the coming fuel pinch.

Wood gas powered a lot of vee-hickles during the last war.
Woodwaste would provide a lot of ethanol to run the chainsaws!

'The history of public debt is full of irony. It rarely follows our ideas of order and justice.' Thomas Piketty

by melo (melometa4(at)gmail.com) on Fri Aug 11th, 2017 at 11:20:41 PM EST
[ Parent ]


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