Slow Sand Water Filter
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Uploaded by Oasis26 on Nov 9, 2008
Prototype unit I built to help me get a better feel for what kind of filtration rate (GPM/sq.ft.) I might expect to see on a larger system (think, rainwater collection.) This one only sees about .5 GMP/sq.ft. which is pretty low. Gonna try different amounts of media. Looking to get 2... 3 max GPM/sq.ft.
Gravel, sand, and activated carbon.
The ability to backwash is nice, but again, it's really not necessary unless you're constantly running something like, oh, mud, through the filter. The idea though, was that the backwash water could be collected (hence that drain pipe in the middle that comes out the side), the solids allowed to settle out, then run the clear water back though the filter.
ATB - "Tristan Da Cunha"
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All Comments (133)
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I'd still boil the water or treat it with ozone to kill any microbes that may have gotten past the filter.
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doe sis it filter awya chemicals?
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i wouldn't drink that :p
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doing this exp for national india projects
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This is pointless. Instead of showing it off, teach us how to make one.
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why fuck around with sand, just get ZERO WATER!
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wow ...
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In this world we need people like you!!!
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Conager415 1 year ago 16
To get better flow the filter should be elevated and the water should not have to travel back up to get down to your clean container. Back washing is a very bad idea as was previously stated it will mix the toxins around and after a few runs you will end up with super toxic water. When it gets dirty dig some of the sand out and refill don't mix it. As to it not taking care of bacteria its not 100% but this same basic idea is used in sewage plants around the country, it does work if used right.
donavan1010 3 months ago 3