For clarity: greywater is the wastewater that comes out of the sink, shower, bathtub and washing machine (so everything except the toilet).
It intrigues me because this is one of the few features that they have in Schoonship but not us. It also interests me, because a quick back-of-the-envelope calculation might point out that in a period of extreme drought, we might not have enough rainwater in stock to guarantee flushing the toilets.
So if anybody would feel inspired, I think it could be worth looking into whether it would be meaningful to provide for the right piping - i.e. separate collection and the possibility for supplying the toilets - without necessarily already investing in the reuse technology itself (= filtering and pumping).
As a small side note for our own records: I know one of the authors of the report linked above, so just in case it might be interesting one day I could ask whether he would be open for a short chat with one of us.
I read this is not so straightforward.
I wouldn’t mind going talking to sb of cohousing Jean. They have installed a system to recuperate grey water.
I also read they have a water expert in the cohousing and they have received financial support from VLAIO, so i guess they won’t mind spreading their knowledge to another cohousing.
If somebody would be interested in joining, let me know…
There is also a ‘facilitateur eau’ at l’ibge, but only for professionals and I see their focus is on rain water.
There was a presentation about the reuse of greywater (with a representative of GEP, the same that installed the greywater reuse installation in cohousing Jean) in 2025. Link to the presentation Link to the Q&A