wayne fajkus wrote:. If true, somebody here posted this, the salt is the first to appear. Other minerals come after further evaporation. So once i scoop out the salt, i should have a salt free, mineral rich water...
The minerals precipitate out of solution in the reverse order of their solubilities, such that the order of precipitation from sea water is:
Calcite (CaCO3) and dolomite (CaMg(CO3)2)
Gypsum (CaSO4-2H2O) and anhydrite (CaSO4).
Halite (i.e. common salt, NaCl)
Potassium and magnesium salts
It would be really awesome if we could think of something that already comes bathtub shaped and made of glass--and the battle would be won.
Chris Kott wrote:I personally consider plastics something to scour from design for sustainability. I use pyrex to take my lunch to work, and the glass lids have silicone gaskets. If water is to be harvested, I would avoid plastics wherever possible.
wayne fajkus wrote:An update. I thought i was getting a brown mineral coming out. It turns out it is rust.
wayne fajkus wrote:I'm consistently hitting 150 degrees f each day (sunny, 90 degree f days). Bar b q thermometer is used, unsure of accuracy. ...... Once this batch is done, i will post the starting water amount and the accumulated salt total.
Steve Farmer wrote:
Thats a great result. What part of the system is the thermometer reading? Looking forward to reports on quantities of water thruput. Id be interested in amount of distilled water collected too.
Kenneth Elwell wrote:
I think the glass containers are best, although ones with more open surface area (like a casserole dish) would be more efficient.
(you could use the lid for a "casserole door rocket batch heater!") ;-)
Bell Cedar Farm wrote:
Get rid of the rocks. Although they hold heat, they are not increasing the temperature to promote evaporation. All they are good for would be holding the temperature higher for slightly longer once the sun goes down, acting as a thermal battery. The rocks, being a lighter color, will also block and reflect light from hitting your newly painted black floor, limiting the amount of light turned into heat.