How does one filter water on a relatively large scale?

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Offline elegantlywasted

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Hey guys,

Well the subject line pretty much says it all but I'll give some more background.

For school I have to give a speech about water saving techniques used in greenhouses and nurseries. The best way to do this is through a capture and recycle program. However I know I will be asked about nutrient run off and I wanted some info on filtering water. I remember seeing it done in science fairs when I was a kid, but I don't remember a lot about or, nor do I know the first thing about doing it on a large scale basis. Any help would be greatly appreciated. Thanks!!!
-Meg

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Offline Chemistry4me

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How does one filter water on a relatively large scale?
« Reply #1 on: 03/02/2009 23:22:06 »
You talking about something like this?

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Offline Chemistry4me

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How does one filter water on a relatively large scale?
« Reply #2 on: 03/02/2009 23:23:04 »
Or this?

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Offline elegantlywasted

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How does one filter water on a relatively large scale?
« Reply #3 on: 03/02/2009 23:48:03 »
Sort of, but on more of a 10,000L or so per week sort of scale....
-Meg

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Offline lancenti

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How does one filter water on a relatively large scale?
« Reply #4 on: 04/02/2009 02:09:55 »
Large-scale desalination of sea water to produce distilled water: The Water Theatre

http://www.worldarchitecturenews.com/index.php?fuseaction=wanappln.projectview&upload_id=497

and

http://dsc.discovery.com/videos/building-the-future-water-theater.html

Large-scale purification of that-which-used-to-be-pee: NEWater

http://www.pub.gov.sg/newater/PlansforNEWater

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For the Water Theatre, the principle behind it is that only pure water evaporates and so if you just condense it, you get pure water.

For the NEWater, I believe they use reverse osmosis but I'm not too sure.