I am a current Master's student in the Learning, Design, and Technology Program at Stanford University. I am particularly interested in the intersection of education, design, and wellness. I am originally from the suburbs of Chicago and previously studied User Experience Design at the University of Michigan.
Thanks for your comment. One of the design restrictions that we had on the biosand filter designs that we were implementing as an engineering team in the rural mountain community of Jamaica was to limit our resources to materials that would be accessible to the community from their local hardware store or community supply collection so that our designs would be sustainable. Like you suggested, for our larger biosand filter designs, we used a 32-gallon, round, plastic garbage bin to function as casing that was readily used in the community and available at their hardware store. The metal screens required for the filtering layers may be a more difficult material to acquire, in addition to the sand and gravel needed for the filtering process, but the screens, at least, could be repurposed from chicken wire or door screens found in the slums.
I like the concept of creating a street/zone level hub of filters, especially as a central space for training. That would significantly enhance the sustainability of the design and wold be a great education space.