I have several installed wwt ...

I have several installed wwt systems on industrial laundries and one extended pilot for laundry/shower/kitchen gray water treatment.  Basically we used rotary screens to remove most lint, dissolved air floatation to remove fine lint and oils, fixed-film bioreactors to remove all soluble biodegradable detergents and conditioners and some dyes, dissolved air floatation to remove biosolids.  At the industrial laundries between 65-85% of this treated water is recycled to the washing machines.  No treated water can be recycled to dye houses (in applications with apparel production) because some dye solutions are very particular and require sulfate free water.

In the extended pilot we added a microfiltration membrane to produce treated water of very high quality with turbidity less than 2 ntu's.  This water after microfiltration could be further treated by ultrafiltration if reuse standards required it.