Prepared Society Forum banner

41 - 57 of 57 Posts

·
Banned
Joined
·
3,375 Posts
In my opinion the days of building a water filter are over with ,so many filters out there to chose from I don`t see the need to go to all that trouble , but if the need comes up, you will definitely need active charcoal and ways to boil the water to finish its purification or by adding chemicals to it, pure clean water is very hard to find in the modern world today and a good desalting filter will cost around $2000.00 for a small hand operated one
http://en.wikipedia.org/wiki/Activated_carbon
http://www.htiwater.com/divisions/personal_hydration/index.html
 

·
Banned
Joined
·
2 Posts
www.en.wikipedia.org/wiki/Water_filter

If you do a little bit of simple research, you may come up with the answer that I got in approximately 45 seconds. Multiple-barrier filtration is the standard. Using not only activated carbon filtration, but particulate filtration to remove minerals, as well as something with specific porosity.
 

·
Banned
Joined
·
2 Posts
In my opinion the days of building a water filter are over with ,so many filters out there to chose from I don`t see the need to go to all that trouble , but if the need comes up, you will definitely need active charcoal and ways to boil the water to finish its purification or by adding chemicals to it, pure clean water is very hard to find in the modern world today and a good desalting filter will cost around $2000.00 for a small hand operated one
http://en.wikipedia.org/wiki/Activated_carbon
http://www.htiwater.com/divisions/personal_hydration/index.html
Good job linking. However, I found there is a more general listing on Wikipedia.
On another topic;
This site needs some cleaning up/moderation bigtime. So many useless forum posts, so little information. It is highly disturbing. It must be someones idea of a funny science project to see how silly we all are when it comes to sharing purdinent information.
 

·
Banned
Joined
·
2,601 Posts
Good job linking. However, I found there is a more general listing on Wikipedia.
On another topic;
This site needs some cleaning up/moderation bigtime. So many useless forum posts, so little information. It is highly disturbing. It must be someones idea of a funny science project to see how silly we all are when it comes to sharing purdinent information.
Thank you Kalial Grabron your added wisdom and knowledge are very useful.
 

·
Banned
Joined
·
3,375 Posts
Good job linking. However, I found there is a more general listing on Wikipedia.
On another topic;
This site needs some cleaning up/moderation bigtime. So many useless forum posts, so little information. It is highly disturbing. It must be someones idea of a funny science project to see how silly we all are when it comes to sharing purdinent information.
I do apologize for disturbing your powerful knowledge base; I was just trying to help.
 

·
Jack of all trades?
Joined
·
8,397 Posts
In my opinion the days of building a water filter are over with ,so many filters out there to chose from I don`t see the need to go to all that trouble ,
It's about sustainability, dude!!!!!
When the supply of "so many filters to choose from" dries up.... the only practical solution after that is to build one. (which is an eventuality anyway, since all water filters have a finite life)

Besides, the "filters to choose from" category also seems to equate to a lot of $$$$... so I'll pass.

I do have Berkey "Candles" to make the "double 5-gallon bucket" style of filter, but I still plan to feed water in that is the cleanest and most pathogen free that I can.

http://www.preparedsociety.com/forum/f20/dyi-berky-water-filter-19274/

http://www.saveourskills.com/gravity-fed-home-water-filtration-system

http://www.tacticalintelligence.net/blog/how-to-make-a-homemade-water-filter.htm
 

·
Banned
Joined
·
3,375 Posts
It's about sustainability, dude!!!!!
When the supply of "so many filters to choose from" dries up.... the only practical solution after that is to build one. (which is an eventuality anyway, since all water filters have a finite life)

Besides, the "filters to choose from" category also seems to equate to a lot of $$$$... so I'll pass.

I do have Berkey "Candles" to make the "double 5-gallon bucket" style of filter, but I still plan to feed water in that is the cleanest and most pathogen free that I can.

http://www.preparedsociety.com/forum/f20/dyi-berky-water-filter-19274/

http://www.saveourskills.com/gravity-fed-home-water-filtration-system

http://www.tacticalintelligence.net/blog/how-to-make-a-homemade-water-filter.htm
I`m fully aware about survival and sustainability in the coming doom but dear fellow a mud filter will not help you at all in any scenario if you don`t have any way to purified the water ,the modern world of today as we speak has many good filters that take care the problem of building one, you can build one and try it at the nearest water pond but I pry for your health and the others that try the water. Good luck.
 

·
Banned
Joined
·
3,375 Posts
Disinfecting drinking water

7 Steps to Emergency Disinfection of Drinking Water

Step 1:
Filter murky or colored water through clean cloths or allow it to settle. It is better to both settle
and filter.
Step 2:
Boiling is the surest method to make water safe to drink and kill disease-causing microorganisms like Giardia lamblia and Cryptosporidium, which are frequently found in rivers and lakes.
Step 3: To improve the flat taste of boiled water, aerate it by pouring it back and forth from one container to another and allow it to stand for a few hours, or add a pinch of salt for each quart or liter of water boiled.
Step 4:
When boiling is not practical, certain chemicals will kill most harmful or disease-causing organisms. Chlorine (in the form of unscented bleach) and iodine are the two chemicals commonly used to treat water.
Step 5:
You can use a non-scented, household chlorine bleach that contains a chlorine compound to disinfect water. (Remember, 1/8 teaspoon and 8 drops are about the same quantity.)
Step 6:
You can use tincture of iodine to disinfect filtered and settled water. Common household iodine from the medicine chest or first aid kit may be used to disinfect water.
Step 7:
Tincture of iodine. For cloudy water add ten drops and let the solution stand for at least 30 minutes.
 

·
Registered
Joined
·
7 Posts
I've seen survival filter instructions online and in manuals that use three handkerchiefs with grass, sand and charcoal. I have a few concerns and questions that aren't addressed in any.
Activated charcoal and campfire charcoal are not the same. In a survival scenario, where does one obtain activated charcoal? Will campfire charcoal be an effective filter?
Water through activated charcoal equals cleaner water ( not purified, I know it still needs to be boiled ). Water through ash equals lye. In all the instructions I've seen, none mention the need to remove the ash from the charcoal before using it in the filter. In all the campfires I've ever had the charcoal has a layer of white ash on it. Is it necessary to remove the ash or not? Am I overthinking this?
 

·
Premium Member
Joined
·
3,583 Posts
Slow sand filtration has been proven for ages (albeit usually on a large scale), so has charcoal for removing impurities, both are completely sustainable and essentially free for people with access to the resources.

If a person thinks they might have to use a system like this to make unsafe water safe to drink then consider making one today and having the water tested (before and after) at intervals. Not very expensive if you do it yourself but in a lot of places there is a government office that will test if cost is a major issue.

I would hope that no one would HAVE to treat their water to make it safe on a regular basis (imo a well with no potential sources of contamination in the vicinity is preferable) of course that is not always possible. Personally when I was in a situation with questionable water I found boiling it on a woodstove to be the easiest solution. It really wasn't that onerous in the situation though it might be different if I lived further south:dunno:. Must have boiled several thousand gallons this way when I start adding it all up.

undumb, what you see in a campfire is not charcoal, to make charcoal you need to control the oxygen levels. Also charcoal that is made at home is not equivalent to Activated charcoal either. You are correct that the ash is not what you want to be using though, that would be bad.
http://www.preparedsociety.com/forum/f2/where-get-water-filter-charcoal-15688/
 

·
Jack of all trades?
Joined
·
8,397 Posts
I've seen survival filter instructions online and in manuals that use three handkerchiefs with grass, sand and charcoal.
You are NOT over-thinking this! Those instructions aren't worth the paper they were printed on! (or worth the electrons to light the screen, LOL!)

I would not trust the water that comes out of the handkerchief filter you described.
 

·
Premium Member
Joined
·
3,583 Posts
Reading back in this thread reminded me about the biosand filters so I checked in with their current version and it appears that they have improved it again. While slow sand filtration is incredibly effective it can be difficult to scale down, the biosand filter achieves this with only a bit more maintenance and possibility for user error messing things up. There is no benefits over a slow sand filter (of which I have more experience), in terms of filtering but it is a much smaller undertaking to build one, and that may be important for many.

All the details on how to build one and the concepts involved are freely available http://www.cawst.org/en/resources/biosand-filter




IF properly used and maintained these filters have no problem removing "all" bacteria and protozoa including tricky little buggers like Cryptosporidium. The only real area that it lags behind slow sand filtration is viruses but even that is not so clear apparently

http://en.wikipedia.org/wiki/BioSand_Filter
A recent study has suggested that virus removal increases significantly over time, reaching 99.99% after a period of approximately 150 days
Which is essentially as good as it gets with micro-organisms and a level that is difficult to achieve even with chlorine or other treatments. Contrary to what is often said, a few drops of bleach does NOT actually kill everything, far from it and in fact quite a few pathogens are resistant to chlorine, it is however effective enough in most situations.
 

·
Jack of all trades?
Joined
·
8,397 Posts
Which is essentially as good as it gets with micro-organisms and a level that is difficult to achieve even with chlorine or other treatments. Contrary to what is often said, a few drops of bleach does NOT actually kill everything, far from it and in fact quite a few pathogens are resistant to chlorine, it is however effective enough in most situations.
Interesting.... most dental exam rooms and hospital offices are cleaned with nothing more then plain ol' bleach water.
 

·
Premium Member
Joined
·
3,583 Posts
Interesting.... most dental exam rooms and hospital offices are cleaned with nothing more then plain ol' bleach water.
And for 99.9% of bugs like you see on most labels that will do the trick, also cleaning solutions are a lot stronger than we can drink.

http://www.cdc.gov/parasites/crypto/resources/childcare_outbreak.pdf
Cryptosporidium is resistant to chlorine disinfection so it is tougher to kill than most disease-causing
germs. The usual disinfectants, including most commonly used bleach solutions, have little effect on
the parasite. An application of hydrogen peroxide seems to work best.

Note: Cryptosporidium is not killed by alcohol gels and hand sanitizers so these materials are
of little use in controlling an outbreak.

Note: The health department may instruct you to soak contaminated surfaces for 20 minutes
with a 3% hydrogen peroxide (99% kill rate) and then rinse them thoroughly. No disinfectant is
guaranteed to be completely effective against Cryptosporidium. However, hydrogen peroxide
is more effective than standard bleach solutions.
http://www.cdc.gov/healthywater/swimming/pools/chlorine-disinfection-timetable.html
 

·
Newbie
Joined
·
13 Posts
So if I boiled water, and collected the condensation, will that work to get rid of anything that could be mixed in the water? Or is that just mainly for salt water? Like if I had a metal container that rusted up some in the inside and a little bit of rust was mixed in the water?
 

·
Jack of all trades?
Joined
·
8,397 Posts
So if I boiled water, and collected the condensation, will that work to get rid of anything that could be mixed in the water? Or is that just mainly for salt water? Like if I had a metal container that rusted up some in the inside and a little bit of rust was mixed in the water?
Rust flakes, sand, etc. and other solids will stay behind. So will salt.

Distilling water will get rid of nearly anything harmful, except organic solvents that have a boiling point similar to water.
 

·
Capt Nemo
Joined
·
1 Posts
Good question, I don't know what sand would filter out, there has to be something that absorbs toxins that combined with purified sand and other things can do a semi-good job of it.

Anyone know if there is a way to filter out salt from salt water?
It's called nano-filtration... also known as reverse osmosis. There are hand held RO systems on the market with prices all over the chart. The Katadyne Survivor 06 Desal unit lists on their site for almost twelve hundred bucks. Amazon sells it for about 890. I'm sure this isn't the only one on the market. You just need to keep looking until you find something priced appropriately. Good luck
 
41 - 57 of 57 Posts
Top