I've been thinking about the issue of precipitate clogging 5 micron socks. Old school sand filters (pool type, not fluidized) are great for filtering sediment, would that be effective for this type of precipitate as well? I think it would be very effective but have no experience with this.
From what I've read most problems with FSB's arise from the biological processes they rely on. Although a pool type sand filter is a totally different concept (mechanical vs. biological filtration), I'd think the most likely source of trouble is the same- undesirable byproducts of bacteria growing deep in the sand. I'd think regular back flushing of the filter would avoid problems from this (although the plumbing involved for the backflushing might be a deal breaker for some people).
One could take it a step further as well- 24v actuators are relatively inexpensive so it would be quite simple to automate the whole process with a controller.
It seeeeems like a good idea, but unfortunately I've said "well it looked good on paper" far more times than I'd like to admit.
Thoughts?
-edit- FWIW I found a source claiming a good sand filter can remove particles down to 5-20 microns in size, with size 20 silica sand recommended. But would this introduce silicates..?
http://ppoa.org/?page_id=399
Another source claiming removal of particulates >10 micrometers
http://www.eusaswim.eu/Documentation/downloads/Paper-on-filtration.pdf