JF Mezei wrote:

On 2016-11-28 21:53, Fred J. McCall wrote:

Try growing plants in soil with no carbon in it and see how that works
for you (it mostly will work very poorly, if at all).

ever heard of hydroponics ?


Ever heard of pulling your head out of your ass?


I thought it was obvious what happened next, but apparently not. Once
you collect enough **** to be useful (it will take a lot more than one
trip) you can process it with in situ resources. Doing it half a
tonne at a time would just be stupid.

When you push a ship to its limits, every percent counts. And a space
vehicle carrying 100 humans for months is way past what humans have done
so far.

And when you push limits, you need to look at every means to
reuse/recycle waste as you can find.


Do you have a point?


Simple question:

if you were top heat the **** to 100°C and collect gases coming off.
What sort or process is involved in separating water vapours from
methane and other stuff? Is is simple task of cooling it just enough to
condensate water vapours and keep the rest in gas form ?


Ever heard of 'distillation'?


--
"Ignorance is preferable to error, and he is less remote from the
truth who believes nothing than he who believes what is wrong."
-- Thomas Jefferson