we have small solar ozonaters costing US $ 100 which can purify river water after filtration through double cotton cloth to give pure drinking water @ 50 liters/hour without electricity-bigger models are also avaible
Published by balbir singh, researcher on water for agricultural irrigation
we have small solar ozonaters costing US $ 100 which can purify river water after filtration through double cotton cloth to give pure drinking water @ 50 liters/hour without electricity-bigger models are also avaible