tag:blogger.com,1999:blog-4858350933853662775.post5962661489714624370..comments2024-03-14T02:19:57.457-05:00Comments on Stealth Survival : DIY Survival Gear - How to Make a Portable SODIS Deviceriverwalkerhttp://www.blogger.com/profile/01575212890278793911noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-4858350933853662775.post-35010484691276196162012-09-04T17:10:16.194-05:002012-09-04T17:10:16.194-05:00To: Jordan
While it is not as good as a reverse o...To: Jordan<br /><br />While it is not as good as a reverse osmosis system, it's a lot easier to put together from simple household items. <br /><br />The treatment of water by this method if no other method is available may enable you to avoid a bad case of dysentery or diarrhea...which could make you even further dehydrated.<br /><br />Thanks Jordan.<br /><br />RW<br /> riverwalkerhttps://www.blogger.com/profile/01575212890278793911noreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-43293159553224030322012-09-04T17:06:22.471-05:002012-09-04T17:06:22.471-05:00To: Max
Thanks Max.
RWTo: Max<br /><br />Thanks Max.<br /><br />RWriverwalkerhttps://www.blogger.com/profile/01575212890278793911noreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-88315687075695875592012-09-04T16:04:20.578-05:002012-09-04T16:04:20.578-05:00I think this is a great idea. I have read most of ...I think this is a great idea. I have read most of the comments, and they are quick to fault the system, although if you have no fresh water, and these are the only supplies you have, this would certainly be better than drinking raw water. Great post!Jordanhttp://www.aquasafecanada.comnoreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-46653750304267248752012-09-02T19:04:00.876-05:002012-09-02T19:04:00.876-05:00Nice idea, thanks for sharing that infoNice idea, thanks for sharing that infoAnonymoushttps://www.blogger.com/profile/10451803352215219935noreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-39460656173252531262012-09-01T08:57:24.237-05:002012-09-01T08:57:24.237-05:00To: anonymous 12:27
Great tip!
Thanks anon.
RWTo: anonymous 12:27<br /><br />Great tip!<br /><br />Thanks anon.<br /><br />RWriverwalkerhttps://www.blogger.com/profile/01575212890278793911noreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-3428502672233547082012-09-01T00:27:03.690-05:002012-09-01T00:27:03.690-05:00One of the ways to use the sun to disinfect water ...One of the ways to use the sun to disinfect water is to use a small soy candle in a bag next to the water bag. When the candle melts, the water has reached pasteurization temperatures. This type of system is used in the desert with a wax insert in the water bag which melts at the correct temperature.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-89815770435267253722012-08-31T20:23:53.428-05:002012-08-31T20:23:53.428-05:00To: Josh
While there may have been errors in my s...To: Josh<br /><br />While there may have been errors in my semantics, the point I was trying to get across is that there are other ways besides boiling, distillation and chemical treatments that can be used to make water safe to drink.<br /><br />Thanks Josh.<br /><br />RWriverwalkerhttps://www.blogger.com/profile/01575212890278793911noreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-30320912604271462852012-08-31T17:58:24.787-05:002012-08-31T17:58:24.787-05:00Interesting setup. In addition to the comment abou...Interesting setup. In addition to the comment about the incorrectness of calling it pasteurization, etc., I guess the first thing I noticed when reading the article was the use of the term “water purification.” What SODIS does is disinfect the water – it kills pathogens in it, but doesn’t remove anything as real water purification would do. Get it – SOlar DISinfection. True water purification would require the removal of any harmful chemicals and dissolved substances in the water. Knowing that you can kill pathogens in water by letting it sit in the sun is definitely handy knowledge to have, but you could conceivably still be drinking water that is poisoning you because of harmful chemicals in it.<br /><br />Not that the article and the idea isn’t good, but maybe a little flawed in its execution. Joshnoreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-4045091293541169102012-08-31T16:35:04.977-05:002012-08-31T16:35:04.977-05:00To; anonymous 4:23
I stand corrected in that it i...To; anonymous 4:23<br /><br />I stand corrected in that it is the UV rays that disinfect the water. In order to Pasteurize the water it would have to get to a temp of 160 degrees Fahrenheit...and like you mentioned that probably wouldn't happen.<br /><br />Tried the bottle method but scratches eventually make the bottles work inadequately and no rotation of the bag is required.<br /><br />Still looking for a better and easier way to treat water...just have to put my thinking cap back on.<br /><br />Thanks for the additional input.<br /><br />RW<br /><br /><br /><br />riverwalkerhttps://www.blogger.com/profile/01575212890278793911noreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-26712967881126910472012-08-31T16:23:04.237-05:002012-08-31T16:23:04.237-05:00Just want to say, that while your design is actual...Just want to say, that while your design is actually pretty decent, the reasoning behind some of your choices is flawed.<br /><br />Heat has absolutely nothing to do with the functionality of the SODIS method. <br /><br />That aside, by blind luck, your design is actually fairly reasonable. You want to avoid punctures, and it helps. You absolutely MUST filter out particulates, and you mention that...if just barely. And the Reflector increases the amount of UV light hitting the plastic bag, thus increasing effectiveness by a slight amount. <br /><br />Still, you should really take this down, research what SODIS actually is, and re-write the article in a way that covers actual information about the system. <br /><br />UV radiation alone destroys the bacteria and viruses within six hours. Parasites require more than six hours, though giardia is neutralized in the time period, cryptosporidia needs at least ten hours. And if you live in an area where Amoebas are an issue, you need to have the water at 50c for an hour, something you are not likely to obtain with this method unless you have very, very bright sunny days. And the plastic bags wouldn't survive it, in any case. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-17556290623969997082012-08-31T15:51:14.567-05:002012-08-31T15:51:14.567-05:00To: anonymous 2:18
Great tip anon!
Now I need t...To: anonymous 2:18<br /><br />Great tip anon! <br /><br />Now I need to add one of those little coffee stirrers to the kit to help in removing as much air as possible.<br /><br />Thanks anon.<br /><br />RWriverwalkerhttps://www.blogger.com/profile/01575212890278793911noreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-23479188209325466832012-08-31T15:47:06.074-05:002012-08-31T15:47:06.074-05:00To: anonymous 12:27
I don't really know how i...To: anonymous 12:27<br /><br />I don't really know how it would affect the water in the bag as long as it was kept flat to minimize the depth the sun's rays have to penetrate. <br /><br />I do know that if you are using a bottle that it is necessary to rotate the bottles...as the overall exposure of the water in a bottle to UV rays is greater.<br /><br />If you use any larger type bottles (3 liter), the process doesn't work as well. <br /><br />The bag in the picture is a gallon size and was slightly more than half full...which is not bad for one person. If you had more persons in your group, you need additional SODIS devices set up.<br /><br />In my area, we get 12 hours of good sunlight most everyday in the summer. This makes it possible to treat a gallon a day with a small set up as I described.<br /><br />Thanks anon.<br /><br />RWriverwalkerhttps://www.blogger.com/profile/01575212890278793911noreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-52592301077941347652012-08-31T14:18:10.623-05:002012-08-31T14:18:10.623-05:00You can use a soda straw or plastic tube to suck m...You can use a soda straw or plastic tube to suck most of the air out of the bag. The straw/tube can also be stored with the bag.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-64117693885615197072012-08-31T12:27:17.579-05:002012-08-31T12:27:17.579-05:00Is agitation of container a factor in how well thi...Is agitation of container a factor in how well this method works ? I have wondered if the person is forced through some circumstance of having to continue to move, if the water sloshing around the container does not get pastuerized and cleansed. I have not found a definitive answer to this.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-87193789415809088872012-08-31T11:23:22.724-05:002012-08-31T11:23:22.724-05:00To: anonymous 7:12
Using a bag gives you more sur...To: anonymous 7:12<br /><br />Using a bag gives you more surface area that is exposed to the sunlight. The depth of penetration for the sun's UV rays is also less.<br /><br />If you don't have a dark cloth, you could use most any dark surface to place it on while it's exposed to the sunlight to help absorb additional heat from the sun.<br /><br />Thanks anon.<br /><br />RWriverwalkerhttps://www.blogger.com/profile/01575212890278793911noreply@blogger.comtag:blogger.com,1999:blog-4858350933853662775.post-54555027146634341122012-08-31T07:12:09.891-05:002012-08-31T07:12:09.891-05:00I like it. Water is a necessity and finding ways ...I like it. Water is a necessity and finding ways to purify it in the field is good knowledge. Thanks for posting this.Anonymousnoreply@blogger.com