18-02-2012, 02:15 AM
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#11
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Arofanatic
Join Date: Jul 2011
Posts: 257
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Quote:
Originally Posted by forcefeedback
Let's get back to basic. The most important part of the filter is the medium. This is where the bacteria should do their work. That is why we need to provide them with a material they can colonize and which is in a permanent flow of the water that needs filtering. Large numbers of bacteria are required, which means that we need a large surface area in the filter medium. This can be achieved by selecting a material that has many holes and capillary pores. These will increase the total surface area for a given volume of filter material.
The size of these holes and pores should not be too small, because the bacteria would otherwise block them or even wouldn't fit in at all - we're talking microscopic organism here...
When holes and pores are so small that bacteria do not fit in anymore, only the outer surface remains to be colonized by them. In a nutshell, IMO for sponge to work, pore sizing is essential or else prepare to mop the floor....
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This nick seems familiar
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