Providing environmentally safe sanitation to millions of people in developing countries is a significant challenge. The task can be quite difficult in developing areas where drinking water and food are the priorities. However, if properly executed a sanitation program can be a success.
Key factors to work with :
1. Successful sanitation programs must be replicated and scaled up irregardless of social class (such as caste system in India).
I was keen to know more about this myself and my findings from examples around the globe is that the biggest key factor for success would be having the political will and backing in addressing the sanitation agenda.
Another key element is in developing the solution very locally and on a small scale, and then scaling it up, instead of a top down approach.
Resources:
http://www.ncbi.nlm.nih.gov/pubmed/11700655
http://www.irc.nl/page/51970
http://goo.gl/XaPe