Sludge treatment

I find this field of study very interesting and it surely has great potential.
The problems seems to be that the sludge is not treated at all and pathogens are not eliminated. We all know the problem of fecal-oral transmission of diseases, so I will refer from further elaborating on this.
As I see it, what would have to be done now is finding a way to process the fecal matter in a way that it is safe to handle and use. I am working on the production of Terra Preta in challenging environments as refugee camps or urban slums. Through the process of lactic acid fermentation, the feces can be made safe in this climate within 2-3 months. In practice this could look somehow like this: If possible, the feces are separated from the urine. They are constantly covered with ashes or, even better, with charcoal which keeps the matter dry and serves as a "home" for microorganisms. While the mixture is stored sealed from oxygen (anaerob) for 3 months, the fermentation takes place and creates a highly fertile soil enhancer. Carbon is not lost as it would be through composting and other nutrients are also contained.
The charcoal needed can be produced in energy-saving pyrolysis stoves, which can easily made locally. (I just made some out of used cans).
The urine is safe and a great quick fertilizer, rich in nitrogen and phosphor. It should be mixed 1:10 with water for application.

This could make the whole process safe and bring nutrients back into the soil sustainably. A business model could be implemented this way, microbusinesses could thrive and added value can be created locally.

I hope I explained my idea somehow. For further information, I set up a homepage: www.buildonterrapreta.org
Please feel free to contact me if you have interests, concerns or doubts.

Harald Bier