posted on Feb, 5 2008 @ 01:51 PM
reply to post by TreX-UK
I worked during the summer at a waste water treatment plant (in canada) and while what you say is true (the sinking part) the reason for sinking is
wrong (at least, here in Canada)
For the most part, after the first stage tanks (the screening tanks; removal of solid matter) the water in the second stage tank is actually treated
with a bacterial agent, that breaks down the remaining solid materials. By constantly feeding the tanks with fresh oxygen, the bacteria grow inside
the tank (and on floating media later introduced to the process) The reason you sink isnt because of possible chemical treatments, its because you are
heavier then the airated water.
In Canada, sewage water is treated with chlorine at the exit point of the plant (not directly the exit point, but the exit stage.)
Furthermore, sewage water does not go directly to your tap (again here in Canada) instead its pumped out to lake/sea (in my case, Lake Ontario) after
treatment (accept in the case of flooding, thats a different story)
Drinking water, i believe, is pulled again from the main body of water, treated, then pumped threw a seperate system. It is this treatment system
that would be responsible for adding fluoride and re-chlorinating the water.
[edit on 5-2-2008 by InSpiteOf]