Rapid Sand Filter (RSF)¶

BioSand & Media Filters • Est. CapEx: Low-cost / Locally fabricated

Technical Overview¶

Rapid sand filtration is a high-rate granular media filtration system used in municipal water treatment. It occupies much less space than slow sand filters but requires chemical pretreatment and skilled operation.

Key Specifications & Engineering Parameters¶

Parameter	Specification
Category	BioSand & Media Filters
Capital Cost	Low-cost / Locally fabricated
Primary Mechanism	Water flows through a multi-layer media bed (e.g., anthracite, sand, garnet) at 5-25 m/h. Filtration occurs via straining, sedimentation, and adsorption within the media depth. Filters are cleaned by backwashing with clean water.
Target Scale	Household / Village Cluster
Standard Lifespan	10 - 20 Years

Engineering Trade-Offs¶

✅ Advantages⚠️ Limitations

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Cross-Reference & Interactive Tools¶

Need to evaluate this technology for your specific field site? Run the WhatWater.info Selector Engine to compare it against 100+ alternative solutions.