Simple and economical solutions for 2.5 billion people that do not have water safe to drink
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Facilitating access to water
Reducing the cost of water
Sanitation and preservation
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Collecting effluents
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Treating effluents
A25 - Treatment by willow-plantation or reed-bed zones at the outlet of a sewage treatment plant
A24 - Filtering mass
A23 - Sand filtration for raw water or wastewater treatment
A22 – Familial sanitation by lagooning and/or by macrophyte filters
A21 – Lagooning techniques
A20 - Macrophyte filters
A19 - Digestors and grease removers
A 18 - Bar screens and spreading systems of wastewater by batch
A 17- Various ecological treatment solutions rather than conventional sewage treatment plants. General presentation