Filtration
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Slow sand filters use mechanical, biological, and sedimentation processes to purify water. They strain out particles and allow sedimentation to remove suspended solids through the slow movement of water. Biological action from microorganisms in the top layers of sand further purify the water through decomposition of organic matter.
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Filtration
- 1. Filtration Mechanism 1. Mechanical Straining 2. Sedimentation 3. Biological Action 4. Electrolytic Action
- 2. Filter • Slow sand filter • Rapid sand filter – Gravity type – Pressure filter
- 3. Slow Sand Filter SSF