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Ceramic water filters

869 bytes added, 12:16, 29 October 2012
How it Works
==How it Works==
[[Image:CeramicFilterPores.jpg|thumb|border|right|300px|Scanning Electron Microscope image of the pores in a 50/50 by volume clay-sawdust ceramic filter. The larger pores were likely left over from burnt off sawdust, while the smaller ones are likely pores between sintered clay crystals.]]
Ceramic clay filters work in a couple of ways, their exact function is not completely understood.The filters work mechanically by filtering water through tiny pores small enough to stop many contaminants like clay, dirt, and possibly even bacteria. These pores are formed partially by the sawdust burning off during the firing process, and partially by the pores that form naturally in the clay due to the low firing temperature.
Most pathogens are attached to particles in the water, so removing these particles makes the water much safer to drink.
Clay pores alone would make an extremely slow filterSecondly, while filters are treated with a filter silver solution (Colloidal Silver or Silver Nitrate). Bacteria is destroyed when it comes in contact with too much sawdust would be ineffective and easily crushedsilver particles. A mixture of 50/50 by volume and The interconnected pores withing the filter body create a firing temperature tortuous path which increases the chance of 890 degrees creates an effective balance between speed, effectiveness, and durabilitybacteria to come in contact with the silver particles.
The silver also acts to prevent bacterial re-growth within the filter walls where it becomes trapped.
There is a lot of discussion about which method of silver application is most effective. The majority of factories currently paint on or dip colloidal silver, others are mixing silver nitrate directly into the filter mix. Problematic factors with the use of silver products include its high cost, and methods of disposal.
Clay pores alone would make an extremely slow filter, while a filter with too much sawdust would be ineffective and easily crushed. Beginning with a mixture of 50/50 by volume and a firing temperature of 900 degrees can create an effective balance between flow rate, effectiveness, and durability.
== Dung fired clay pot filters ==

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