MBR for domestic greywater
I found this system almost serendipitously. I just searched “tinyhouse greywater recycle” to see if my own website was being indexed yet, an this caught my eye in the search results. Great… I had previously searched for “membrane bioreactor domestic” etc several times, an this never showed up. And this isn’t the first time this sort of thing has happened. I have officially lost all faith in Google’s supposedly leet ability to find what you are looking for.
Anyway, it’s interesting. They use flat plate modules, and it filters about 600 l per day, apparently. We only need 70 per person, so you can imagine if you divided the system size by 9 it would be a fairly manageable size. Just need to get a hold of one of the membrane modules they use. Maybe you could buy one from them as a spare part….
You would want some polishing with activated carbon and ion exchange resin to use it for showering, of course, and a redundant disinfection stage.