Compared to popular concrete biosand filter designs the Sandstorm biosand filter presented here claimsto be lighter, cheaper, faster to make and requires no special tooling or molds. Tested in realistic fieldconditions in Ethiopia alongside popular concrete biosand filters Sandstorm delivers higherbacteriological removal efficiencies and larger water volumes. Though particularly relevant forimplementation in a low-technology, small-scale enterprise model, the design also offers significantscale-up advantages for larger scale implementers due to the advantages of manufacturing speed andtransportability. The innovative design follows a partnership between Tearfund UK and Desert RoseConsultancy in Ethiopia.
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