Processing of Human excreta with Kitchen or Industrial Ashes, Kitchen Waste, Lime, Probiotics will:
Results in easier handling.
Improves soil structure.
Prevents animals from spreading the excreta to surroundings.
Prevents environmental pollution.
Protects people from spread of diseases.
Reduces foul smells.
Composting of feces with Food waste, Ash, Lime, Probiotic Blend in as it is weight ratios of 3:0.5: 0.5:0.5:0.02 is found to be ideal.
Styrofoam insulation (75 mm thick) around the compost reactors and compost turning every two days enable sanitizing temperatures (>50°C) to be reached and sustained for over a week, giving a reduction of foul smell and also a reduction of Pathogens >3log10 for E. coli and >4log10 for Enterococcus spp.
The generation rate of excreta in humans is found @ 0.6–1.6 L urine/cap/day and 120–425 gm wet feces/cap/day.
The generation rate of the elements in the excreta is about:
7.6–8.1 gm N /cap/day,
1.6–1.8 gm P /cap/day,
1.8–2.75 gm K /cap/day,
1.0–1.11 gm S /cap/day,
0.75–1.55 gm Ca /cap/day,
0.25–0.5 gm Mg /cap/day,
9–17 mg Zn /cap/day,
1.4–1.6 mg Cu /cap/day,
0.3 mg Ni /cap/day,
0.02–0.03 mg Cd /cap/day,
0.07–0.14 mg Pb /cap/day,
0.01 mg Hg /cap/day
0.8–1.1 mg B /cap/day.
While the metals (Ca, Mg, Zn, Cu, Ni, Cd, Pb, Hg) are mainly excreted via the feces; the remaining elements (N, P, K, S, B) are mainly excreted via the urine.
It can be concluded that human excreta constitutes a large fertiliser resource, which presently is not utilised .