Sari Filtration Description

Pasted Graphic
Source: The Cylinder.Net

Description
Woven fibers (e.g. linen, cotton, and other cloths) are widely used for POU water treatment because of their low cost and simplicity. One method used by women in the Indian subcontinent, known as sari filtration, involves using garment cloth folded 4 to 8 times to filter solid particles and microorganisms from water.

Development
Indigenous Appropriate Technology

Performance

Contaminant Removal
Sari filters are usually effective for removing solid particles and microorganisms that are larger than 20 micrometers, including free-swimming pathogen larvae, guinea worm larvae within crustacean hosts, bacteria with large copepods, and zooplankton, including those harboring V. cholerae. A study of quadruplefolded saris found that 99 percent of V. Cholerae was removed from water. These filters do not remove chemical contaminants or dissolved compounds from water. Additionally, studies have found that a sari’s fibers loosen significantly the more they are used, increasing their pore size and making them less effective.

Ease of Use
Fiber filtration involves placing the filter over the opening of a water vessel and pouring the contaminated water through.

Benefits & Drawbacks

Benefits
  • Simple
  • Readily available
Drawbacks
  • Does not address other possible contaminants

Costs

Fabric and fiber filtration costs are minimal and associated with acquiring or making appropriate materials.

Resources

References & Links