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Discussions about design, construction, use and implementation of dry composting toilets. Dry composting toilets separate urine and feces and use both as fertilizer. Feces are composted for at least 9 months killing all pathogens. Dry composting toilets prevent contamination of ground water, save water, reduce waste and produce useful fertilizers.
1 1 7 years 43 weeks ago
by Pilgrim
Discussions about the production and use of rice husk ash cement, a pozzolana that can be combined with lime or ordinary portland cement to form a cementitious binder.
3 11 5 years 48 weeks ago
by Geoffrey
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5 10 5 years 48 weeks ago
by Geoffrey
23 59 4 weeks 1 day ago
by jgarcias.cr
16 37 3 years 28 weeks ago
by Geoffrey