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You want to disinfect your water with the help of a UV water filter? You are a DIY type of guy?
Why not try and build your own homemade UV water purifier?
Enter our step-by-step DIY guide on how you can do exactly that!
First things first:
If you are planning to make your own at-home UV drinking water purifier, it certainly could be a little bit cheaper, but keep in mind it may not be as effective as purchasing one already made.
And while you cannot really build your own unit completely from scratch, what you can do is buy the different components found in regular UV water treatment systems and put them together yourself.
Sounds good? Then let’s dive right in!
This is vital for the effectiveness of your DIY UV water purifier. If you have any sediment in your water, microorganisms can hide behind it, and your UV light won’t be able to reach and kill them.
That’s why appropriate pre-filtration needs to be installed to make sure that the water passing through your purifier will indeed get properly disinfected.
Selecting the correct UV light source for your DIY system is imperative. The bulb size needs to be right to make sure the water is exposed to it for long enough, and the UV intensity output needs to be strong enough for it to kill microorganisms in the time the water is exposed to it.
UV light intensity and exposure time determine the final UV dose germs will receive. Different types of germs need varying levels of UV doses. Bacteria and cysts need relatively low dosages. Viruses are more stubborn; not to mention fungi and algae.
All in all, in order to keep things simple, we recommend you get the strongest UV light bulb available. 30 mJ/cm² should be the minimum.
Once you have everything prepared, drawn up, and laid out ready to go, it’s time to put it all together.
Before you start using the purified water, we recommend you conduct proper pathogen testing. You can compare the unfiltered with the filtered water to find out how effective your homemade UV water purifier really is.
It is also possible to disinfect water using the sun’s rays alone, though this can be a lengthy and somewhat risky procedure if not done the right way.
The basics involve filling a transparent container with water and exposing it to the sun for a certain amount of time. If you use the right kind of container that allows UV rays through, and it is a relatively sunny day, disinfection can occur in around 6 hours. If it is cloudy, or your holding container doesn’t let the UV rays in properly, it could take at least several days. This method is called SODIS (Solar water disinfection)
It is suggested that you use a PET plastic water bottle no bigger than half a gallon, as any larger could cause disinfection to be ineffective. The bottle must be clear, clean, and laid down on its side rather than standing up in order to maximize the depth of penetration.
Bacteria & germs killed from sunlight in optimal conditions, exposure at 6 hours:
If you have any questions about how to make a UV water purifier at home please don’t hesitate to leave a comment below!
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