dinvinci wrote:I'm intrigued. What's your rainwater catchment system like? I would like to set up a rainwater catchment system but we have an asphalt-shingled roof and I've been told this is not a very suitable collection surface in terms of drinkable water. The cost of a new metal roof of course is pretty substantial, obviously, in addition to the costs of installing a cistern and pump and other peripheral devices. Since we only pat $30/month for water now it doesn't seem cost-effective....of course then I find myself wondering, but what if we couldn't get clean water at ANY price? I'd really be wishing I'd installed that roof and cistern and everything back when it was still relatively easy to do so.
PeakOiler wrote:I'm not spamming the board ya'll, but I thought some readers might miss the reply I made in a current post on this forum, and since I thought this topic may be of interest to people like Matt Savinar, (since he's getting into selling solar products,) I wanted to post the message again.
I've been using one of SolAqua's solar water distillers for nearly four years now for about 99% of my drinking and cooking needs. I began distilling the city utility water, but the utility water is so hard, I was constantly needing to clean the calcium carbonate (limestone) out of the basin.
So now I only distill naturally soft rainwater. There's no oil-based organics in rainwater either, (or at trace levels only, less than what leaches from plastic bottled water.)
Here's a few interesting excerpts from SolAqua:
"The basic principles of solar water distillation are simple yet effective, as distillation replicates the way nature makes rain. The sun's energy heats water to the point of evaporation. As the water evaporates, water vapor rises, condensing on the glass surface for collection. This process removes impurities such as salts and heavy metals as well as eliminates microbiological organisms. The end result is water cleaner than the purest rainwater. The SolAqua still is a passive solar distiller that only needs sunshine to operate. There are no moving parts to wear out."
"The first "conventional" solar still plant was built in 1872 by the Swedish engineer Charles Wilson in the mining community of Las Salinas in what is now northern Chile (Region II). This still was a large basin-type still used for supplying fresh water using brackish feedwater to a nitrate mining community. The plant used wooden bays which had blackened bottoms using logwood dye and alum. The total area of the distillation plant was 4,700 square meters. On a typical summer day this plant produced 4.9 kg of distilled water per square meter of still surface, or more than 23,000 liters per day. This first stills plant was in operation for 40 years!"
" Obtain a US$135 FEDERAL TAX CREDIT for purchasing a single solar still in 2006-07. The House and Senate approved a 30% tax credit bill for the installation of a solar system on your home or place of business, and President Bush signed the bill into law on August 8th 2005. There is a maximum $2,000 for residential applications and no cap for commercial applications. Additonal state credits may apply in your state. Call your Tax Preparer for information for your particular case."
I think SolAqua is a member of the Texas Solar Energy Society.
SolAqua
Loki wrote:Looks interesting. I played around with these as a kid growing up in Arizona--don't remember getting a ton of water from them (but mine were pretty primitive). I assume central Texas gets plenty of sun. How does it work when it's cloudy? I live in western Oregon and it gets cloudy here on occasion.
I recently purchased a Big Berkey filter from eBay. Unfortunately the sender didn't pack it very well and all the filters broke. He refunded my money, so I basically got the shell for free. But it goes to show how easily something like this can be put out of commission. Plus I don't think it would filter out the toxins from water collected off of my asphalt-shingle roof.
Loki wrote:Caoimhan, thanks for the info. Makes sense. If distillation doesn't remove volatiles, what does? I'm thinking of installing a water barrel, but I have asphalt shingles. I rent, so I can't replace them or cover them. Having a supply of non-potable water would be better than nothing, but it would also be nice to be able to safely drink it.
Quinny wrote:I've not managed to buy nothing!
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