How is toilet water purified into drinking water in the process of toiler water recycling? Best gets 10 points

Question

Please Help!

Answer 1

Whatever winds up in lakes and rivers used for drinking is cleaned and disinfected along with the rest of our water supply. Still, a recent analysis of San Diego's drinking water found several contaminants, including ibuprofen, the bug repellent DEET, and the anti-anxiety drug meprobamate. No treatment system will ever be 100-percent reliable, and skeptics who worry that pathogens in sewage water will make it past treatment and into our drinking water should worry about all drinking water, not just the water in a toilet-to-tap program. The fact is, supertreated wastewater is clean enough to drink right after treatment. It's been used safely this way (in a process known as direct potable reuse) for years in the African nation of Namibia.

Answer 2

http://www.sandiego.gov/mwwd/facilities/...

Here is a link to a working plant that does this.