If you're serious and looking for a human feces solution, then you might consider bio-gas as a solution. See all of Dr. Culane's videos on it:


The fecal matter and table scrapes are inexpensively digested in a reactor and then the methane produced is used to heat homes, provide light, and for cook stoves. It's been extensively tested in diverse areas.

Mainly it's an issue of enough fecal matter, and since you're living in one of the most densely populated countries, then it probably would be ideal.

[link to solarcities.blogspot.com]

I know Kerala India is currently using biogas for cooking gas production.



Ignore comments from unhelpful people.

[link to www.habmigern2003.info]
Here's one that's being done in the rural Philippines.