Hello your approach is far ...
Hello your approach is far too simplistic as if it was enough to want to recycle sewage to make it happen.
First of all it is important to materialize waste water: their origin, their content, their volume, their pollution.
Then with which treatment tool will you perform the purification then the objective on which the liquid after treatment will be dispersed
If the outlet on which the liquid is dispersed at the end of the treatment is biological-it is necessary that your purification tool be-biological-and that the sewage is entirely-biological-.
The closer the treatment tool is to the place of waste water production, the more these wastewaters will keep their characteristic-biological-.
Same for the dispersal zone. The outlet must be at the end of the treatment site and the discharge must be permanently on this outlet.