The BioAusable team will design and construct small pre-filters to be used in conjunction with a biosand filter to provide clean, potable water ( up to 20 gallons a day) to individual households in developing countries. The pre-filters will protect the main bio-sand filter from silt build-up and will provide the first stage for pathogen removal. They will employ flood-drain technology to increase still water contact time with the sand. The pre-filters will be constructed from locally available recycled materials and will be little or no cost. Assembly of the Bio sand filter and pre-filters will take no more than one day to accomplish.   (updated 4/1/12)

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