Unfortunately, there is no ...
Unfortunately, there is no relationship between the treatment of wastewater, reuse water and drinking water.
Initially it is important to clarify the word treatment which means everything and especially to say nothing.
When you're studying very closely the methodology of wastewater management we can realize that there is no treatment to own Senna of the word.
We have to find the qualification of treatment: sewage, purification. Off she doesn't appear anywhere.
Wastewater management is limited to a splitter function of suspended solids in the liquid.
Filtered by all means possible until you get a liquid get rid of everything, including bacteria.
Then one rejects this liquid in the environment in multiple forms that remains all the same the way to get rid of this liquid.
Except that this liquid contains a lot of dissolved impurities: urinates it, chemicals, disinfectant sanitizer and other body of dead bacteria.
By this principle this liquid cannot be recycled in a food need. But it can not be recycled for another use because it will end up in the environment by polluting nearby natural water environments.
It is pretty oblivious to bind water to wastewater. It is well know the drinking water. Before drinking it undergoes a very long chain of property and at the same time to load elements including the living on Earth in need.
We can but at an exorbitant price and always without any insurance certainly drinking water, to clean the sewage completely. Except that this water will be an inert product empty. It will bring nothing to the living to grow.