Straining (fabric or micro)
Ceramic pot filter
Ceramic candle filter
Kisii filter bucket
Arsenic filter
Iron filter
Charcoal filter / Activated carbon
Ceramic Silver Pot (CSP) filter
Siphon filter
Concrete Biosand Filter
Slow sand filter
Rapid sand/gravity filtration
Upflow roughing filter
Chulli Pasteurization
Winona development
