How can one make a water cleaner for a well using Titanium Dioxide and UV light?

Hi, I have been looking into cleaning my well water at the source, rather than fed in into the lines. I have looked at making a simple ozone generator by purchasing one online and using a compressor to get it down 40 ft. Then I came across "silver bullet" and what intrigued me was that they produced hydrogen peroxide, which apparently is a a better bacteria killer, perhaps more stable.

The reason that I want to kill bacteria and have it in the well at the source is because lots of iron bacteria and iron in my water plugging up my pump every so often is frustrating. This product looks promising, but costly, so researching this I found that they were using UV light, but normally UV light makes ozone with air. Then I dug deeper and then found out they are using a matrix made up of something similar to Titanium Dioxide (there are different forms, such as anatase and rutile which maybe more effective) so that when struck by proper UV light, it gives of an electron which will hit water vapor in air and split up water molecules to form OH- and H2O2 and some O3.

So, one can buy TiO2 online, put it into a container that fits a UV lamp inside and blow compressed air through that and down the well, but the powder might get blown down the pipe. So how can one crystalize it around a cylindrical form that fits around a UV light to make it more efficient?

I saw a similar post by Ian and he wants to use it for air cleaning, but gluing doesn't appeal to me as the glue itself might react with oxidants produced and give off other contaminants that I do not want in the water.

So, can I use a type of glue that is safe around oxidants?
Is TiO2 able to crystallize easily? ( I read that it doesn't dissolve in water well, which would rule out supersaturating water and crystallizing it that way)

Any thoughts and suggestions?

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You could look at sintering TiO2 onto glass plates. There's an interesting piece here, where they do just that with no more than a bunsen burner.

http://teachers.usd497.org/agleue/Gratzel_solar_cell%20assets/instructions%20for%20making%20the%20gratzel%20cell.htm

Hendrik0360 (author)  steveastrouk2 years ago

Yes! thank you steve,

I saw something like this before without the details of what liquids they were using to dissolve the TiO2. But this is what I am interested in.

Please let me know how you get on with the idea ! Just remember UV at the right kind of wavelength probably won't go far through the water or any glass.

Hendrik0360 (author)  steveastrouk2 years ago

My system is up and running now for a couple of days. Anyways, time will tell what difference this will make. So far, rust particles are in the water bowls. This either means the lines are cleaning out, or the iron is being oxidized by the aeration/ozoning process and then precipitating out later, which I will need to filter out.

Thanks for letting me know

Vyger2 years ago

I have bad well water with lots of iron. My pump never clogs because its a submersible pump. It pumps out the iron before it has a chance to oxidize and form a precipitate. They are not cheap but they work really good and you can seal the well after they are installed.

Hendrik0360 (author)  Vyger2 years ago
Hello Vyger,
Unfortunately once a well is infected it is really hard to remove the iron bacteria. Apparently your method is a good one for preventing infection, including taking care when installing the well.

But another reason we may have an issue, is I have a bunch of cows on the well, and the well has ran dry a few times. (It is a submersible pump as well). We also had a flood one spring and it contaminated our well with coliforms for awhile. That problem has gone away on its own. So this isn't just a household well where the water won't really move around much. It gets used quite a bit.

Are you sure about iron bacteria ? Which species are they ? We have a LOT of old drift mines near where I used to live in England, and they gushed iron rich water out without any bacteria present.

If the problem is excess iron, you need a different process to precipitate it out of solution.

Hendrik0360 (author)  steveastrouk2 years ago
The iron sludge that builds up but not fully plugs the lines is slimy, indicating its a bio-film. The pump gets constricted enough to become useless, again, the iron doesn't solidify like mineral deposit, it stays gritty but slimy. Even if it wasn't the bacteria, this process will oxidize the iron and then you can use a filter to remove the rust. Let me know what you think,

Thanks for your quick reply, Steve.

No problem - see below for an idea for fixing TiO2 hygienically in a system in contact with water and UV