Reverse osmosis plus ...

Reverse osmosis plus chlorinaton which applies pressure to water on one side of a membrane allowing pure water to pass through, eliminates viruses, bacteria, protozoa, and pharmaceuticals. The water is then disinfected by ultra violet light (UV) or ozone and hydrogen peroxide. Finally, it is added to groundwater or surface water reservoirs where it stays for an average of 6 months to be further purified by natural processes. (This is done mainly to assuage public anxiety about drinking recycled water.) Once drawn from the groundwater or reservoir, the recycled water goes through the standard water purification process all drinking water .​Urine is 95% water, which 2.5% is urea and 2.5% is a mixture of hormones, enzymes and salts. Urine comprises of a few toxins that are not toxic enough to cause any harm to the body. There are numerous ways of filtering urine in order to drink it for survival.

"To pull pure water out of urine, the system uses forward osmosis, which, as the name implies, works in the opposite direction of the reverse osmosis systems found at many kitchen sinks. Forward osmosis uses a concentrated salt or sugar solution to draw the water out of urine. Next, enzymes in a bioreactor convert the leftover urea into ammonia, which feeds into an electro chemical cell that uses the ammonia to generate electricity."