Producing hydrogen from urea in urine. It is not obvious how this would be scaled up but there's a mention of wastewater.
http://www.rsc.org/chemistryworld/News/ ... 070902.asp
There's also a paragraph at the end about collecting urine to extract phosphorus. That's a topic mentioned occasionally on Powerswitch, peak phosphorus.
Urine turned into hydrogen fuel
Moderator: Peak Moderation