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by tequila_shot 3039 days ago
how is gas green?
4 comments
epicureanideal 3039 days ago
Maybe they meant natural gas (actual gas) rather than the liquid fuel we call "gas" as short for "gasoline".
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fastbeef 3039 days ago
Biogas can be generated by fermenting sewage. All buses in Stockholm run on it, it burns extremely clean and is carbon-neutral since it utilizes carbon already in the present carbon cycle.
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devy 3039 days ago
All yeast strains produce some amount of hydrogen sulfide during fermentation as a by-product of sulfate processing. [1]

You can barely call that biogas "burns extremely clean" with hydrogen sulfide in them, can you?

[1]: https://beerandbrewing.com/off-flavor-of-the-week-sulfur/

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fastbeef 3039 days ago
Sorry, bad choice words. The work is not done by a yeast so perhaps it’s not technically fermenting. The work is done by a type of bacteria called archea. As far as I know the only byproduct Upon burning biogas is CO2 and water vapor.
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Spooky23 3039 days ago
Low emissions.

The alternative IC engine is typically diesel and spews lots of carcinogenic particles and compounds.

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the-dude 3039 days ago
You may have a point. It burns cleaner ( liquified natural gas ).
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