What's the cleanest (from the harmful crap like bacteria/lead/etc)
bottled water anyone? Bay area tap water has high counts of bacteria &
floride. And is it true a simple UV light will kill 99.9% of bacteria
in water? TIA.
On Aug 8, 2:31 pm, email@example.com wrote:
A good household water filter takes care of that. What idiots dont
know about water leads them to buy bottled water, you can make better
out of tap, which is what alot use to make bottled. You are first off
panicking, second misinformed. 3rd over concerned x 10. I use a simple
filter used by mc Donalds, the army, airlines, etc etc but I forgot
its name because its not relavent in my life. Shacklee makes a great
table unit, but you really need to learn and not panic. what people
are getting sick from is Mexican fields , chillies, from field and
sewage treatment plant flood runoffs. I was In mexico in Mechicuan
Cotija, the sewage plant was in the valley with the crops, in the
monsoon season it overflowed, do you need any more explanation. They
got sick and did not know why. Instead Go buy a iphone and dont worry
There are effective UV water purifiers. These don't work on lead. I
thought fluride was good thing. There are companies that will do fairly good
water testing. Perhaps you should figure out if you have a problem before
you look for a cure.
Sorry, I have no opinion on bottled water.
I buy a UV light and stick it to my 1 gallon filter tank, how
efficient will it be in killing bacteria?
Consult with a pro since you already have your lab results. I can not
tell you that some unknown light bulb will generate enough energy at the
proper frequency to kill the bacteria nor do I know how long it would take
to sterilize a gallon of water.
You sound as if you want to do this yourself. I'd recommend heading to
the library if there is a good one nearby or get help from the ag extension
folks. Remember that the UV light may damage the filter tank if you are not
careful and it will not be safe for humans.
I've tested my tap water. 90% of harmful stuff isn't present. Problem
is 10% is present.
Take your lab results to a water conditioning company or two and see what
they recommend to correct your water. If it's really expensive or you don't
own the home use bottled water for drinking and cooking.
I know of no universal solutions. UV sterilizers are useful, I use one
to process all of my water as it comes from my well, but you first need
to understand it's limitations. Look at the energy/unit area required
to kill various organisms
Some are quite resistant, many organisms aren't listed here also.
A key issue is maintenance. The internal surfaces through which UV
energy must pass must be kept clean. The water must be clear too. Some
water, due to particulate matter has a very high extinction coefficient.
I doubt the effectiveness of small, under counter, UV sterilizers at
anything but the very lowest flow rates.
As to materials, UV is attenuated by many glasses, plastic may be
better, but will likely be damaged by UV. Quartz is best.
I'm thinking about strapping a small UV light to my water filter
reservoir, about a gallon big. That should do it. Doubt UV light will
harm the plastic aside from the
heat of the bulb.
Blattt! Wrong answer! LOL! Sorry, I thought that it would be a hoot.
Anyway, UV light has damaging effects on nearly all plastics. Just think to
the things that you've noticed had cracked or faded. I don't believe it
will happen tomorrow but it will happen over time. There might be a site
around which will assist with an estimate but there are a lot of variables
at work. If the resevoir is inexpensive and easy to find you can go for it
and see if it fails in the next couple of years.
So does mere age accomplish the same thing to all material, a little
UV just speeds the damage to some minute degree. Does that mean never
buy water sold in clear plastic bottles? No. Sunlight comes through
our kitchen for several hours every day for years and nothing plastic
has noticeably cracked or deformed. Relax.
Yeah time will do this to everything. The faded part is UV induced but
Nothing will fail in a couple years. Couple decades and it will be
mainly due to age.
The glass used for making bottles also blocks UVC and even most UVB.
Then again, I have doubt about sterilizing water with a light source
that does not exterminate plankton in shallow ponds.
- Don Klipstein ( firstname.lastname@example.org)
There's bags of studies on this concept. Here's one:
"In-vitro studies carried out at the Royal College of Surgeons in Ireland
confirmed the bactericidal effect of solar radiation and showed that
transparent plastic bottles allow passage of more ultraviolet light than do
transparent glass bottles. Although glass transmits ultraviolet light more
readily, the thinness of plastic bottles compensates for plastic's greater
absorption of ultraviolet light. This finding suggested that non-returnable
plastic bottles, which are widely available and even a source of pollution,
may be used for the disinfection of drinking water."
The authors consider this experiment utilizing little brown babies in Kenya
as a follow-up to an earlier study that relied on the heating effect of
sunlight for disinfection.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.