Found an earlier post and reposting here with some edits on sizes of opening and prices)
Some ceramic filters incorporate nano-silver impregnated into a porous ceramic outer shell that can trap bacteria down to as low as .22 of a micron in particle size [1/100,000 of an inch]
....
Laboratories consider a filtering medium with an effective pore size of .01 micron to .45 micron to be bacteriologically sterile and .45 micron to 1.0 micron to be bacteriologically safe...
Source: A Guide to Water Filters - Compare Different Types of Water Filter TreatmentsHow small should a stencil
Bacteria range in size from 0.2 to 2 microns in width or diameter and from 1 to 10 microns in length for the nonspherical specie, so a 1-micron filter will remove most bacteria and cysts.
Source:
Micron Rating, Water Filter Micron Size, 1 Micron Water Filter, 5 Micron Water Filter
What if one uses a sediment filter(the towel in the video), series of pre-filter to prevent the final filter from clogging early, and a 0.2 micron ceramic filter at the end of the filtration system for a wash out booth?
As posted earlier, that ceramic drip filter is the one I plan to put at the end of my filtration system. I clarified with the dealer and was told that ours is a 0.2 micron filter but the one on the video has 0.5 micron. A brand new Korean Ceramic Drip Filter impregnated with silver cost about US20 here. A Taiwan made 0.9micron ceramic drip filter cost about $17 and a China made 0.9 micron ceramic drip filters cost under $10.
My plan is to use the newer filters to filter our drinking water then after every few months, move it to the washout booth/tank/bucket. I may add more filters to facilitate the draining.
These ceramic filters are very fragile and are often rinsed only for cleaning. But if necessary a soft sponge applied to the ceramic surface very gently can be done. Hard strokes may damage the filter. These filters can be used until the ceramic thins out due to washing or if it cracks.
Your sediment filters(cloth or any suitable fabric including old screen mesh) and pre-filters(finer fabrics or larger micron filters) should determine how long your ceramic filters clogs or needs cleaning.
A cheaper alternative
[media]http://www.youtube.com/watch?v=R4HU8oYiCwg&feature=channel[/media]Pre-filter ideas(anything fibrous that can screen out solids)
[media]http://www.youtube.com/watch?v=LAXuIfnxvG4&NR=1http://www.youtube.com/watch?v=NSli3yAe0Uw&feature=related[/media].
DISCLAIMER: I do not guarantee the accuracy `of the data quoted nor in the videos.[/quote]