Could Composting Toilets Solve Our Slum Toilets Problems?

I love simple solutions to environmental problems because I believe ideas are only sustainable if they respect existing ecosystems.
While surfing the web, I came across the idea of composting toilets, which are basically toilets that allow you to make manure out of human waste. The beauty of these toilets is that they are easy to set up and anyone can operate them. This is definitely something I would have in my future home and farm. I also think they could be something to consider for Kibera and even middle class estates, together with urban farming.

Humanure have a really simple composting toilet that I think would work for our low income households. There are other more complex units that take even 4 years to fill up. The video below shows how one lady uses her outdoors composting toilet to make compost for her garden.