So, it's been a known fact urine (sterile) can be fertilizer. So why hasn't this been a universal approach to farming as well as construction standards all along?
Why is the split toilet just been introduced now?
http://www.treehugger.com/files/2010/03/nomix-toilets-positive-survey-in-7-european-countries.php
It seems to be easier to throw away waste rather than collecting it effectively as in the case of the urine fertilizer that it has to be sterile or fresh, so it needs extra effort to do this.
Peeing in a bottle seems so backward and unsightly with all the collected specimens in your backyard or bathroom?
But this is still doable, maybe if I'm retired and always at home, yes I can do this, but for now, the split toilet can help.
I've heard of big realty companies having separate sewage system to be used for methane or fertilizer. I think it would need a large scale collecting system to make it more commercial, for home use will suffice the home garden.
Embarrasment over saving on fertilizer on your home garden and lawn? I can live with it. There's a work around this.
http://www.howtodothings.com/home-garden/how-to-use-urine-as-a-fertilizer