Solar water filter

[Nice65]

This is an amazing invention. It doesn't remove chemicals but the tiny device dropped into water (quantity of H2O undisclosed), removes germs. Whatever the quantity of water, it's a very interesting device.

https://www6.slac.stanford.edu/news...more-solar-energy-disinfect-water-faster.aspx

 

[Robson Valley]

Less than an ounce of water and 3 species of bacteria.
However, you're absolutley right about the concept and value.
There's no reason to suppose that the effects would not be widespread.

Imagine a soft plastic 5 gallon hourglass thing with the invention(s) in a transparent neck,
the water just dribbling by.

My kid is an emergency medicine researcher at Stanford.
I'll ask her what she hears.

 

[Jared]

From the paper

"we achieved water disinfection of >99.999% inactivation of bacteria in 20 min with a small amount of material (1.6 mg l[SUP]–1[/SUP]) under simulated visible light. "

The bacteria they used in testing was E. Coli.

Sounds cool, whilst solar disinfection relies on UV, they're harnessing more of the visible light.

 

[scarfell]

UVC is a good way to sterlize things, its used in hospitals and even coral aquariums, although UVC is also very dangerous for people you can buy UVC LED's which might make a useful tool for this purpose (as long as it was properly designed to avoid exposure to human skin/eyes)... a microscope would confirm death of protozoa and other larger organisms, but not syre how you would check for bacteria and virii

 

[Robson Valley]

Plate a lawn of water sample on a Nutrient Agar petri dish and incubate 48 hrs.
That, at least would show you bacteria.

 

[Leshy]

Found this...

http://www.ebay.com/itm/222241604576


Just search :

"puralytics" water

on eBay and loads turn up.

 

[Jared]

Not sure what those Puralytics bags actually do over regular solar disinfection with any clear container.

https://en.wikipedia.org/wiki/Solar_water_disinfection

 

[Leshy]

Not sure what those Puralytics bags actually do over regular solar disinfection with any clear container.

https://en.wikipedia.org/wiki/Solar_water_disinfection

Hi Jared.
Brilliant solution the UV.

The difference with the puralytics system is the ability to destroy and purify contaminants like diesel , petrol , pesticides and other man made chemicals as well as heavy metals .
Nanotechnology mesh that is activated by UV .

Here's an excerpt of the description on their eBay listing...

#quote
The SOLARBAG is the only water purifier that is proven to remove virtually every lethal toxin found in contaminated water, including gasoline, diesel fuel, pesticides, herbicides, toxic heavy metals like lead, arsenic, cadmium, and mercury, and pharmaceuticals like artificial hormones and animal antibiotics
- Eliminates 99.9999% bacteria, 99.99% Virus, 99.9% Protozoa, removes heavy metals and destroys manmade chemicals
- The SolarBag is a reusable portable water purifier that cleans 3.5 liters at a time and offers the broadest protection of any portable water filter, and is the only non-powered, non-chemical device to exceed the most stringent water quality testing standards from the US EPA and WHO
- Nanotechnology based water purifier destroys contaminants instead of merely trapping them, no pumping, sucking or back flushing, simple to use, self-cleaning mesh doesn't clog, reusable 100's of times while producing clean tasting water time and time again.
#End quote

Not affiliated

 

[mrcharly]

That sounds like snake oil to me.

'Destroys' heavy metal contaminants? um, how?

[Edit] having read the full description, it doesn't claim to destroy all contaminants, but the bag is lined with something that captures them.

That, I can believe, particularly given the price, which is really not cheap.

 

[Janne]

These have been many inventions like this over the years. None seem to work in real life, and disappear.

Nothing beats a good rolling boil......