drmacro Posted August 18, 2016 Share Posted August 18, 2016 Hi All, I did some searching in this forum and on the web with little success...really, almost none. Given the drought situation in my area, I would like to avoid refilling my spa because the current water is saturated. This is the term used, by the pool and spa industry, to describe when the chlorine, ph, and hardness chemicals have been used for a while and basically don't do much anymore. I've looked at reverse osmosis filters, but it appears they dump a high percentage of the water forced through them. So, is there a way to chemically cause the precipitate out or a different way to remove the chemicals. I'm chemist and don't play one on tv...I do have a pretty good background in engineering, so I'm not afraid to tinker... Any ideas?? Regards, Mac Link to comment Share on other sites More sharing options...
Endy0816 Posted August 18, 2016 Share Posted August 18, 2016 Could make a still relatively easily. Link to comment Share on other sites More sharing options...
Sensei Posted August 19, 2016 Share Posted August 19, 2016 SPA water? In what volume? You should check out how sewage treatment is working https://en.wikipedia.org/wiki/Sewage_treatment Link to comment Share on other sites More sharing options...
foxy john Posted August 20, 2016 Share Posted August 20, 2016 Could make a still relatively easily. Make it a solar still - even better. Link to comment Share on other sites More sharing options...
Endy0816 Posted August 21, 2016 Share Posted August 21, 2016 Make it a solar still - even better. Yeah, I was originally thinking of a hybrid(depending on the volume). Solar stills are normally slow, but if you incorporate the spa itself as a water heater should speed up the evaporation. Link to comment Share on other sites More sharing options...
drmacro Posted August 22, 2016 Author Share Posted August 22, 2016 Hmm...the solar still might work. The references I've read say it can get out the chlorine and fluoride. Does that mean those evaporate at a higher temp than water? or do they go to gas rather than liquid? Mac Link to comment Share on other sites More sharing options...
foxy john Posted August 22, 2016 Share Posted August 22, 2016 They will stay in the water as chloride salts. However as Endy states, this is going to be pretty slow to get significant amounts or a very large still. Link to comment Share on other sites More sharing options...
drmacro Posted August 23, 2016 Author Share Posted August 23, 2016 Correct me if I'm wrong... That means all the folks who think they are drinking water from solar stills that is sans the chlorine and fluoride are mistaken. And, I would be gaining nothing, since my goal is to remove those things so the water in the spa is sans chemicals as well. It would, I guess, remove solids and possibly other contaminants though. Link to comment Share on other sites More sharing options...
John Cuthber Posted August 23, 2016 Share Posted August 23, 2016 "That means all the folks who think they are drinking water from solar stills that is sans the chlorine and fluoride are mistaken." No, They will be very near to correct. I'd not like to have to try to measure the fluoride or chloride in water from a good solar still. There will be nearly zero. The solar still idea would remove essentially anything that wasn't volatile-. Some chlorine (not chloride) might make tit through the process. It would certainly be clean enough to reuse in the spa. Link to comment Share on other sites More sharing options...
Endy0816 Posted August 24, 2016 Share Posted August 24, 2016 You can reuse the water in other ways as well. Probably simpler option. Generally everyone needs to flush or has plants that need watering. Link to comment Share on other sites More sharing options...
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