Re:South Korea now recycles 95% of its food waste
by azernik on Saturday April 13, 2019 @02:35PM
(#19654851)
That just indicates that metal recycling is super advantageous, to be profitable even with the abnormally low price of energy.
Re:South Korea now recycles 95% of its food waste
by Scoundreller on Sunday April 14, 2019 @01:13AM
(#19657718)
A lot of natural gas is stranded or considered a waste product of oil production.
So fertilizer plants in those areas suck up that cheap CH4 to reform it into H2 and heat up the Haber-Bosch process to make ammonia and then into more transportable fertilizers like urea.
Not that cheap. In the aforementioned metal recycling example, the energy is typically coming from fossil fuels too; refining aluminum from ore takes an insane amount of electrical power. Even if you do that with renewable energy, that's still that much power that can't be used for other things that must be supplied by another power source (e.g. fossil fuels.)