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Survival and Preparations Long and short term survival and 'prepping'.

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  #1  
Old 09-04-2021, 3:58 PM
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Default Near Salt Water ? Water Supply

https://www.fastcompany.com/1670546/...ater-drinkable

they say this is $50 but I haven’t seen where it’s bought, but the idea of about 100 oz of fresh water a day from salt water for $50 is pretty good.
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Old 09-04-2021, 4:32 PM
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Only if the sun cooperates though.
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  #3  
Old 09-04-2021, 4:32 PM
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1 1/2 gsllons per day
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  #4  
Old 09-04-2021, 7:18 PM
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Thought it was a little less that a full gallon a day. Considering the cost you could afford one per person pretty easy. Sun isn’t great in northern environments say Oregon to Alaska but decent CA and south.
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Old 09-04-2021, 7:24 PM
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You could probably do better with a kiddie pool and a tarp. Cheaper too. If it gets to that though I’ll build a conventional still for quicker results.
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Old 09-05-2021, 1:06 PM
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Quote:
Originally Posted by deckhandmike View Post
You could probably do better with a kiddie pool and a tarp. Cheaper too. If it gets to that though I’ll build a conventional still for quicker results.
Agreed.
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  #7  
Old 09-07-2021, 1:39 PM
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The idea of unlimited water is comforting, and it is just a short hike through the dunes, but I think I'm going to focus on the creek as a first backup, with a rain catch behind that. Some mornings, the redwoods and firs catch so much moisture they rain on the house even without actual rain.

Good idea to have multiple backups though. Water is super important.
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Old 09-07-2021, 1:55 PM
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Dumb question because I don't know anything about water filtration: how does the water get clean...or is the steam filtering out more than salt, such as bacteria?
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Old 09-08-2021, 10:01 AM
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I have seen a similar device that is very simple. It's made of clear plastic in an inverted cone shape. Seawater is placed in the inner part and the device is put in the sun and the water evaporates. It then condenses on the inner walls and runs down and is caught in a "lip" and is then drained out. As I recall they were designed and made by some humanitarian NGO for use in Africa. The cones are lightweight and portable.

Kind of like this: an Aquamate Solar Still.
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  #10  
Old 09-08-2021, 7:49 PM
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Quote:
Originally Posted by SmokeTheClay View Post
Dumb question because I don't know anything about water filtration: how does the water get clean...or is the steam filtering out more than salt, such as bacteria?
https://en.m.wikipedia.org/wiki/Distillation

https://en.m.wikipedia.org/wiki/Desalination

If there are volatile contaminants of similar or lower boiling point they will carry over.
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  #11  
Old 09-13-2021, 9:52 AM
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I went on eBay and was able to buy a Katadyn hand operated desalinator. Mine was made for an 18 man liferaft. It has been so long, but I recall it only cost me about $200. I then sent it back to Katadyn for refurbishing which only cost me around $125.
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Old 09-13-2021, 11:06 AM
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Quote:
Originally Posted by SmokeTheClay View Post
Dumb question because I don't know anything about water filtration: how does the water get clean...or is the steam filtering out more than salt, such as bacteria?
The water turns to steam, cooled back to a liquid, collected, and made available for you to drink. Other contaminates like salt are left behind. That being said, there are some contaminants that will evaporate before or at the same temp as the water so those will be in the water you drink as well unless you filter that water as well. However if you are in a survival situation, drink the water once distilled.
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Old 09-14-2021, 7:52 AM
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Quote:
Originally Posted by RandyD View Post
I went on eBay and was able to buy a Katadyn hand operated desalinator. Mine was made for an 18 man liferaft. It has been so long, but I recall it only cost me about $200. I then sent it back to Katadyn for refurbishing which only cost me around $125.
The next logical question: What on earth do you own where you stow an 18 man life raft!
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  #14  
Old 09-14-2021, 8:17 PM
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This entire line of thought is a bit useless. You will NOT be able to keep a family of 3 or 4 alive on 1 gallon a day if that is the ideal performance of the distillery.

Using salt water for survival is notoriously hard. It will not be a viable solution if all the water in the area is cut off.
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  #15  
Old 09-15-2021, 7:40 AM
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I don’t understand why the state isn’t pursuing desalination on an industry level.
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  #16  
Old 09-15-2021, 9:07 AM
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Quote:
Originally Posted by CAL.BAR View Post
This entire line of thought is a bit useless. You will NOT be able to keep a family of 3 or 4 alive on 1 gallon a day if that is the ideal performance of the distillery.

Using salt water for survival is notoriously hard. It will not be a viable solution if all the water in the area is cut off.
Salt water for survival is absolutely possible. Maybe not with that garbage still OP posted, but there are better ways.
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  #17  
Old 09-15-2021, 10:36 AM
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Quote:
Originally Posted by twinfin View Post
The next logical question: What on earth do you own where you stow an 18 man life raft!
On a U.S. Navy ship.
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Old 09-15-2021, 8:41 PM
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Desalination on industrial scaleis very energy intensive. They typically use reverse osmosis instead of distillation (which is even more energy intensive).

Passive solar distillation is great for small scale (family size needs).

Several methods explored
https://www.sciencedirect.com/scienc...64032116301800
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Old 09-16-2021, 8:33 PM
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Desalination on a grand scale will never be taken seriously until all the proper politicians and their cronies can profit.
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Old 09-16-2021, 8:58 PM
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There’s a desalination plant in north coastal San Diego County that produces about 10 percent of the county’s drinking water.
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  #21  
Old 09-17-2021, 6:44 PM
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Default @$50

Well since they are $50 one per family member would be pretty reasonable, and likely a good solution.


Quote:
Originally Posted by CAL.BAR View Post
This entire line of thought is a bit useless. You will NOT be able to keep a family of 3 or 4 alive on 1 gallon a day if that is the ideal performance of the distillery.

Using salt water for survival is notoriously hard. It will not be a viable solution if all the water in the area is cut off.
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  #22  
Old 09-17-2021, 7:10 PM
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Thanks for the share!

Do you know where one might be able to buy one of these? Also, would you be able to use it for other non potable sources of water to make water drinkable or something?
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  #23  
Old 09-27-2021, 7:21 PM
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It is an open source, free to use design, just search Eliodomestico open source and they say the material cost is about $50
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  #24  
Old 11-02-2021, 8:26 PM
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Sea kayakers have figured out how to make fresh water.
https://nswskc.wordpress.com/2010/03...kers-7778/amp/
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  #25  
Old 11-11-2021, 7:55 AM
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Quote:
Originally Posted by harbormaster View Post
https://www.fastcompany.com/1670546/...ater-drinkable

they say this is $50 but I haven’t seen where it’s bought, but the idea of about 100 oz of fresh water a day from salt water for $50 is pretty good.
Build your own distillation plant.

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