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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 2 By geoffrey 7 months 1 week ago
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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.
5 18 By Dan 8 months 3 weeks ago
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5 10 By geoffrey 7 years 6 months ago
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27 73 By geoffrey 2 days 17 hours ago
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17 42 By geoffrey 7 months 2 weeks ago