Definition
Layered filtration is a method where water passes through multiple layers of different materials, each designed to remove specific contaminants. Common layers include gravel, sand, charcoal, and cotton, which trap particles of decreasing size and adsorb chemicals.
Why it matters (in Poovi’s context)
This method is a fundamental principle in many water purification systems, from simple homemade filters to industrial applications. It is cost-effective and relies on physical separation and adsorption to clean water.
Key properties or components
- Graduated pore sizes
- Adsorption capabilities (e.g., activated charcoal)
- Mechanical straining
- Simplicity
Contradictions or debates
While effective for many impurities, layered filtration alone may not remove dissolved salts, viruses, or certain heavy metals without advanced materials or processes.