SoDis bag
Three million people in the world get their clean drinking water from solar water disinfection (SoDis). Can it be 30 million?
Solution: One reason that the Swiss Federal Institute of Aquatic Sciences and Technology (Eawag) pioneered, World Health Organization-approved SoDis technique for water disinfection is not more prevalent is that it requires recycled 2-liter PET bottles. These bottles are very expensive to transport to remote areas where the process would have the most impact, due to their high shipping volume: useful disinfection volume ratio.
Haddock has developed a US$0.10 water disinfection bag which has been proven to disinfect biologically contaminated water in less time than bottles (approximately 1 hour in sunny conditions). In shipping, the bags take up 50x less space than bottles. This product was designed along with a manufacturing process which can be replicated in most countries in the world, using a single film and heat sealing for the fabrication.
To achieve the product targets, the SoDis bag uses a unique transparent valve structure which has been shown to have additional applications in global food packaging. New versions of this technology are currently in development.
