It’s either, though I believe I read somewhere they were using a cartridge filter. I think the cartridge would have a better performance of removing the solids. The backwashing of sand etc would produce a fairly nasty fecal dump (in my opinion) and I don’t know if that filtration system could be 99% cleaned. The cartridge can just collect solids debris and removed/ replace with a brand new sterile filter. Of course if those filters aren’t replaced….
Somewhere in this system, the solids need to be removed unless of course our resident DefamationsUFlash insider can fill is in differently.
Since they have said zero discharge, I think they are using a cartridge filter. Big question is what is the filtration size and how often is it replaced ?
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