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Did
you know?
Reverse osmosis is the finest water filtration method known. This process will
allow the removal of particles as small as ions from a solution. It is used
to purify water and remove salts and other impurities in order to improve the
color, taste or properties of the fluid. R.O. uses a membrane that is semi-permeable,
allowing the fluid that is being purified to pass through it, while rejecting
other ions and contaminants from passing.
This technology uses a process
known as crossflow to allow the r.o. membrane to continually clean itself. This
is the reason of why an r.o. element can last many years before clogging or
need replacement. This
water purification process requires a driving force to push the fluid through
the membrane, and the most common force is household water pressure or pressure
from a booster pump. The higher the pressure, the larger the driving force and
efficiency.
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Basic
Types of Water Defined
In
general, water for drinking and cooking should be wholesome. It should
be both potable and palatable. It must be bacteriologically and chemically
safe for drinking and be good tasting. It should be clear, colorless,
and have no unpleasant taste or odor.
In
our present-day world, we need at least three basic types of water of
somewhat different quality, depending on the requirements of each use:
1. Utility Water.
Water which is suitable for use in sanitation and lawn sprinkling; adequate
in quantity, bacteriologically safe, but not necessarily treated to the
highest quality.
2. Softened Water.
Water which is optimum for bathing, shampooing, personal grooming, laundering
and dishwashing. Since many of these uses demand hot water, fully softened
water produces better results with minimum soap and detergent usage, and,
in addition, provides conservation of energy required for water heating.
3. Drinking Water.
Water to be used for drinking and cooking must be of high quality. It
must meet or exceed the bacteriological and chemical requirements of both
the EPA Interim Primary and Secondary Drinking Water Regulations. Since
water used for drinking and cooking amounts to only about 1/2 of 1% of
the total water supplied by a community, this amounts to 0.875 gallons
per person per day of the 175 gallons per person per day furnished by
the community. The remaining amount (over 174 gallons per person per day)
is used for a variety of purposes such as sprinkling lawns and irrigation,
flushing toilets, fighting fires, cleaning streets, as well as utility
commercial and industrial uses within the community.
4.
Of course, many commercial establishments (laundries, beauty salons, car
washes, etc.), industries (for rinsing and specific processes), and institutions
(hospitals, for example for laboratory use, hemodialysis, etc.) will want
to provide extremely high quality water of different types for specific
applications at the point of use.
Today,
more than ever before, water
is what we make it -not only for community
water supplies, but also for individual water supplies. Point-of-use water
treatment today is an extremely viable and readily available means by
which water of extremely high quality can be provided. Moreover, since
treatment takes place just before the water is used, point-of-use water
treatment also provides distinct and unique advantages in that only the
amount of water needed for each specific purpose or application is treated
to the desired quality and also that there is virtually no opportunity
for recontamination of the water from the distribution system after treatment.
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