I guess you talk about use of Biofilm on roods on floating plants added to artificial floating islands:
forum.susana.org/forum/categories/67-cha...-this--to-that#18213

If you mean an "aquaponics" fish & plant recirculation then definitely no as this by itself is already a balancing act to have clean water for the fish.

If you meant "hydroponics", as a pure plant based recirculation system, then maybe, but the strength of the waste water would need to be really thin and you could only produce non-food crops to avoid contamination.

It would also not "sanitize" the water as that would mean removal of pathogens. It would probably result in some reduction of pathogens, but mainly it would be a way to reduce the nutrient content before discharge.

Of course you could call an artificial wetland a very simple hydroponics system for non-food plants... but I guess this is not what you had in mind

Hi
I have a question:

Could aquaponics be a method of sanitization of water?

i will thank you so much