[justa-hairyape]

There has been some talk of recycling water so that sewage treated water never goes back into the natural environment. In some very arid (dry) places they probably do directly recycle sewage water. Remember the movie Dune ? In most cases however, the issues resulting from putting human 'used' and treated water back into the natural environment, are addressed by dilution. I have seen the following statement somewhere in the past. 'Dilution is the Solution'. Do not remember where I saw it though. Perhaps someones trademark ?

[Riley]

Maybe so. I used to work for a company that designed systems of this sort. It was interesting to see how they did what they did. I wasn't an engineer, so my understanding of it was limited- but it seemed to be a highly sophisticated process.