News for hackers. Stuff that matters.

A comment on UPS is working on a fleet of 50 custom-built electric delivery trucks. Parent comment

Re:UPS is working on a fleet of 50 custom-built electric del... by fastbeef on Thursday February 22, 2018 @01:31PM (#16440002)
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.
[ Parent | on HN ]
Re:UPS is working on a fleet of 50 custom-built electric del... by devy on Thursday February 22, 2018 @02:05PM (#16440380)
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/

[ Parent | on HN ]
Re:UPS is working on a fleet of 50 custom-built electric del... by fastbeef on Thursday February 22, 2018 @04:42PM (#16441684)
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.
[ Parent | on HN ]