Sunday, July 5, 2015

Daily Tech - Electronic Water Purifier

A water purifier, also known as a water filter, provides the kind of clean tasting and odor-free drinking water that a tap is unable to do on its own. The demand for purer water led to the explosion in the popularity of bottled drinking water in the 1990s, with sales of bottled water tripling in the U.S. between 1989 and 1999. However, the regular purchase of bottled water is an expensive proposition that can also have a deleterious effect on the environment due to all of the plastic bottles that circulate as a result. Thus, home water purifiers such as those produced by Brita, PUR, Whirlpool, General Electric, and Aquasana not only get rid of impurities from tap water that degrade its taste and have possible long-term health consequences, but they also save consumers a great deal of money on the purchase of bottled water.

There is a wide array of different home water purifying systems and this guide will identify each type, how it works, and how to purchase the right system based on home water purification needs.

What’s the difference between the eSpring Carbon Water Treatment System and the eSpring Water Purifier?
The primary difference is that while both units have carbon-block filters, only the eSpring Water Purifier has ultraviolet light technology to treat water without chemicals.

Additionally, the eSpring Water Purifier must be plugged into a wall outlet. The eSpring Carbon Water Treatment System runs on four “AA” batteries, making installation easier when power is not available where you want to install the unit (typically under the kitchen counter).

Are both the carbon block and UV light really necessary?
While carbon filtration – used with varying degrees of effectiveness in many water treatment options, like pitchers and faucet-mount filters – is the most effective single treatment method available to most homeowners, we do not think it is enough. That is why we have developed the dual-technology eSpring cartridge/filter/UV light. Its carbon block filter removes compounds that affect taste and odor along with organic health-effect contaminants (such as pesticides and VOCs). Our carbon filter can also reduce inorganic contaminants (such as lead, mercury, and radon). The UV light treats water additionally without chemicals providing a protective barrier for your family.

Can I still continue to use the unit without changing the cartridge when I am supposed to?
You really should not do that. cartridge life is based on the ability of the carbon block to trap contaminants; if you leave the carbon block unchanged when it has filled up with contaminants, it will not be able to trap new contaminants. Depending on how long it has been left in service, there’s a chance that accumulated contaminants may detach and “dump” into the treated water, making the treated water even worse than the water coming in. The UV lamp is rated for a certain number on UV “ON” time and starts. Depending on your use pattern it may deplete its life prior to the carbon filter. Guaranteed performance is the goal of the eSpring brand.

Will the carbon filter remove all contaminants?
No. Activated carbon readily adsorbs (causes to stick to its surface) organic carbon-based compounds, but it does not have an equivalent removal capacity for inorganic compounds such as iron, lime scale, nitrates, hardness minerals (such as calcium and magnesium), or soluble heavy metals like chromium or cadmium.

Should we stop drinking bottled water?

Many people buy water filters or bottled water in an often mistaken belief that tap water is dirty or harmful to drink. In fact, as the Environmental Protection Agency (EPA) reveals, over 90 percent of US water systems meet the federal standards for tap water quality. In England and Wales, for the year 2007, 99.96 percent of drinking water met national and European standards (involving some 40 different quality measurements). Those figures are pretty remarkable really, when you consider just how dirty we make water and some of the things (like pesticides and car oil) that people flush down their drains. Even so, the high quality of most drinking water doesn't stop people spending something like $35 billion, worldwide, each year, buying bottled water that's several thousand times more expensive than tap water?
Cost isn't the only drawback of bottled water. Most of it comes in disposable plastic bottles that are hard to recycle. Dumped in landfills, washed away in rivers, dropped on beaches, burned in incinerators—plastic bottles add to the pollution that's reducing the quality of Earth's natural water supply. How ironic: by buying "clean" bottled water to keep ourselves healthy, we're helping to make Earth a dirty place and making things worse overall.
Next time you buy a bottle of water, don't throw the bottle away: why not keep it—and refill it with tapwater? Providing you wash the bottle out properly, you can reuse the bottle any number of times. Chances are you'll get water that's just as healthy, but at a fraction of the cost both to your pocket and to the Earth. Alternatively, buy yourself a hygienic, refillable aluminum bottle.
Best of all, give the money you save on bottled water to WaterAid and help some of the people who genuinely lack clean water in developing countries. Let's count ourselves lucky we don't have to drink water straight from a dirty river, like many people still do.

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