Whether it is grey or black ...

Whether it is grey or black water it can be treated with the microbial species called Archaea and all compounds will be reduced into their elemental/nutritional form.  It also will chelate at toxic metals into their non toxic/nutritional form. If you require biomass for rebuilding your soil fertility and increasing your crop yields then filter this out after the odor is completely gone. It will be non pathogenic and non mutational at that time.  Setting parameters and timing is all that is remaining.  Laundry, showers, cooking, drinking, and of course long term storage for unexpected droughts.