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Disinfection of Drinking Water |
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meewee
Valued Member Joined: December 13 2005 Location: United States Status: Offline Points: 595 |
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Posted: January 18 2006 at 5:28pm |
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Here's the web site from EPA for emergency disinfection of drinking water. http://www.epa.gov/ogwdw000/faq/emerg.html . Meewee |
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God Bless us all!
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I indend to utilize solar pasturization (no chemicals). http://solarcooking.org/spasteur.htm
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meewee
Valued Member Joined: December 13 2005 Location: United States Status: Offline Points: 595 |
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Good post Sophia! Just printed it out and will try this out myself! Meewee |
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God Bless us all!
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bruss01
Adviser Group Joined: January 12 2006 Location: United States Status: Offline Points: 448 |
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SophiaZoe, I understand the appeal of the pasteurization method (no energy input other than solar, no chemicals) but I would have a hard time having confidence in it - it may be 100% safe, but myself and my wife would hate to have to rely on water from our local river (which in time of crisis may be polluted with untreated sewage or runoff) if treatment by that method was our only option. Especially during the cooler months when skies are overcast. We plan to use swimming pool shock (calcium hypochlorite) to treat water. We plan to have 4 barrels of 55 gallon capacity to store "city water", and we will be adding a minimal amount of shock just to give a base level of protection during storage, since the barrels will be sealed and the water changed out for fresh every 6 months. We will have extra shock on hand for treating non-city water if needed. We think this is better than bleach because calcium hypochlorite will store in dry form nearly indefinitely (10 years), whereas liquid chlorine bleach loses half of it's potency after a year (use twice as much for the same effect) and is next to worthless after two years. For those who remember Y2K, here's a flashback for you: "Dry chlorine, also called calcium hypochlorite has the added benefit of extended shelf life. Providing it is kept dry, cool and in an airtight container, it may be stored up to 10 years with minimal degradation. If you want to keep chlorine in larger quantities, this is the item to store (according to Bingo1). It must be ONLY 65% calcium hypochlorite, no addtional anti-fungals or clarifiers. In an EXTREMELY well ventilated area, (Hint: OUTSIDE!) add and dissolve one heaping teaspoon of high-test granular calcium hypochlorite (approximately 1/4 ounce) for each two gallons of water. Five pounds of dry pool bleach costs about $10-15, which will make about 92 gallons of bleach, which will sterilize 706,560 gallons of clear water, or 353,280 gallons of cloudy water. " If the chlorine taste proves to be objectionable, we have a First Need water filter that is capable of removing the excess chlorine. Edited by bruss01 |
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While your concerns are certainly valid I would point to the fact that this method is being aggressively introduced in Africa where water is notorious for being contaminated with sewage. Death and disease has dropped dramatically in areas where this method of water purification is used. And in some areas where they have very high participation dysentery has disappeared. (Simple enough that anyone can do it, no added expense of chemicals or fancy equipment, requires no fuel except that provided by the sun for free). Also, I live in the south....we have lots and lots of sun. And my supply of last resort is a small community lake, I believe its about 10 acres in size, very deep. We have never experienced a lack of oxygen in this lake as so many smaller and medium sized lakes do. It is a very healthy mini eco-system. |
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Lilla
Valued Member Joined: January 12 2006 Status: Offline Points: 6 |
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Does anybody of you americans know if Brita filters are good to filter not-contaminated water? (as of rainwater etc)
I have many of them a friend of mine bring from USA, so I was guessing if they can be useful. Thanks! Lilla from EU |
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---Bad english spoken---
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