ARTE
BELLEZZA E BENESSERE
MESTIERE
CULTURA E STORIA
DIVERTIMENTO
AMBIENTE
CIBO E BEVANDE
FUTURO VERDE
INGEGNERIA INVERSA
SCIENZE
SPORT
TECNOLOGIA
INDOSSABILI
Purifying Water with a Natural Filter — Charcoal, Sand & Gravel
Build a three-layer water filter from charcoal, sand, and gravel. Important: always boil filtered water for 1 minute — filtration alone does not kill all pathogens.
Beginner
30-45 minutes
Istruzioni
1
1
Filter Layer Diagram
Filter Layer Diagram
Water flows top to bottom through three layers: charcoal (chemical filtration) → sand (physical filtration) → gravel (structural support). Always boil after filtering.
Flow
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2
2
Make Charcoal
Make Charcoal
Burn hardwood until fully black. Smother with sand to stop combustion. Cool, then crush to pea-sized pieces. ~2 cups needed.
3
3
Assemble Filter
Assemble Filter
Container (bark cone, hollow log, or cut bottle). Grass plug at drain. Layer: 5-8cm gravel, 8-10cm sand, 5-8cm charcoal, thin gravel cap on top.
Design
Cross-section: labeled layers with measurements
4
4
Filter & Boil
Filter & Boil
Pour water slowly. Discard first dark batch (charcoal dust). By third pass, water runs clear. ALWAYS boil 1 minute before drinking.
Materiali
- •Charcoal (crushed) - 2 cupssSegnaposto
- •Fine sand - 3 cupssSegnaposto
- •Gravel - 2 cupssSegnaposto
- •Container - 1 pieceSegnaposto
Strumenti richiesti
- FireSegnaposto
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