Originally Posted by
T316
Well, this last page has just about lost me. However, although I'm not totally sold on drinking the waste water, I'm not buying into the theory that the same amount of "junk" is moved along from one filter to the next. Filters one, two, and three have to be removing something, there not just there for looks. This should leave, at the very least, better water than what entered. Therefore, when it hits the ro membrane, it can't still have the same crud as it did from the tap. And it's not a matter of less water/more concentration because no water has escaped yet, only bad things removed so far.
The problem is that the discussion wasn't entirely accurate. What you have is not multistage RO, which I was thinking was going on. What you have is multi-stage filtering WITH RO. That makes a big difference, and no, your waste water will never compare to bottled water. The US government set a standard of 10 PPM of purified water. (10PPM would be your low end stuff). One stated that he had 25 PPM tap water and that is really clean tap water. The company I worked for gauranteed 4 PPM, but in reality was much better as they always lowball the gaurentee.
Now if you just had multistage RO, as what I have, what I discribed is how RO actually filters. Now only after the pictures did I see that you guys and me were kind of on a different page.
With that said. I would not recommmed drinking it, unless you test it before you drink it. If your sediment filters were to fail, then you basically just increase the consistancy of sediments, because RO is taking out just H2O and leaving the other stuff behind. Sediment filters are basically just there to compound filtering the sediments. Carbon just takes out the Chlorine and the RO squeezes out the water (rated GPH of your filter system) What I mean is that if you have 20 GPH output, then you have say 30 gallons in and 10 gallons of waste water to output 20 gallons of FO water (I am just putting in numbers) But you get the 30 gallons worth of sediment in the 10 gallons of waste water. Or the leftover sediment that teh RO didn't take out if your sediment filters are working ok
I have a three stage RO where I work now on a newspaper press, much like when I was in the bottled water business. That is just three stages of RO filtering where they squeeze pure water (about 99.5%? or so) out and the brine has all the filtered stuff left over which is in a higher concentration of that before the RO filtering. Much to my bucket of salt reference earlier. In multistage like this you would take 30 gallons of water and make 29 gallons of RO water. Thus instead of 30 gallons worth of sediment in 10 gallons of waste water it would be into 1 gallon.
