What is Reverse Osmosis?
Reverse osmosis, also known as hyperfiltration, is the finest means of
filtration available today. It is the most common treatment technology
used by premium bottled water companies. Reverse osmosis refers to the
process of forcing water through a semi-permeable membrane under pressure.
How does Reverse Osmosis work?
Reverse osmosis uses a membrane that is semi-permeable, allowing pure
water to pass through it, while rejecting the contaminants that are too
large to pass through the tiny pores in the membrane.
Can Reverse Osmosis be used on Bore water or water from other untreated
sources (lake or river)?
Yes, RO is generally an excellent choice for homeowners with bore water.
You should have your water tested for bacteria and virus contamination
before relying solely on reverse osmosis. A water softener or whole-house
iron filter may also be advisable (depending one the level of relevant
contaminants in your bore water) to prevent membrane fouling thereby ensuring
maximum membrane life and effectiveness.
How often does the reverse osmosis membrane need to be replaced?
With proper maintenance of your sediment and activated carbon pre-filters,
your reverse osmosis membrane should last 2-3 years.
Why are reverse osmosis systems always combined with carbon and sediment
The only major category of contaminants that reverse osmosis is not highly
effective in removing (organic compounds) is specifically targeted by
activated carbon filters. Pre-filters also prevent the reverse osmosis
membrane from being fouled or clogged by sediment, chlorine, and other
contaminants, thereby enhancing its effectiveness and lifespan.
Are all reverse osmosis systems equally effective?
Absolutely not. Like all water filters, the effectiveness of a reverse
osmosis system depends greatly on the quality of its components - especially
its pre-filter cartridges (quantity and quality) and the membrane itself.
Lower quality pre-filters will suffer from premature membrane fouling,
as well as reduced performance, purified water output, and membrane life.
I notice that a reverse osmosis system will remove just about everything
from my water, including some nutrients that are good for the body. Should
I take a supplement to counteract the nutrients that I will no longer
get through my water?
No, this is not necessary. You should already be getting all of the nutrients
such as essential salts, vitamins, and other trace minerals from the food
you eat and the other beverages you drink.
What is "crossflow"?
Quality reverse osmosis systems use a process known as crossflow to allow
the membrane to continually clean itself. As some of the fluid passes
through the membrane the rest continues downstream, sweeping the rejected
contaminants away from the membrane and down the drain. This prevents
contaminants from backing up against the membrane and clogging it.
Reverse Osmosis represents state-of-the-art in water treatment technology.
Reverse Osmosis (RO) was developed in the late 1950's under U.S. Government
funding, as a method of desalinating sea water.
Today, reverse osmosis has earn its name as the most convenient and thorough
method to filter water.
It is used by most water bottling plants, and by many industries that
require ultra-refined water in manufacturing.
Now this advanced technology is available to homes and offices for drinking
short, it is the process by which water molecules are forced through a
0.0001 micron semi-permeable membrane by water pressure.
Long sheets of the membrane are ingeniously sandwiched together and rolled
up around a hollow central tube in a spiral fashion.
This rolled-up configuration is commonly referred to as a spiral wound
membrane or module.
They are available in different sizes for processing different quantities
of water. Typically, a module for home water treatment is as small as
2" diameter and 10" long, while one for industrial use may be
4" diameter and 40" long.
the membrane to be usable it must be in some type of container (membrane
housing) so pressure can be maintained on its surface. It is this pressure
that supplies the energy to force the water through the membrane, separating
it from unwanted substances. The most amazing aspect of RO is that the
substances left behind are automatically diverted to a waste drain so
they don't build up in the system as with conventional filtering devices.
This is accomplished by using a part of the unprocessed water (feed water)
to carry away the rejected substances to the drain, thus keeping the membrane
ARE THE SPECIFIC CONTAMINANTS THAT A REVERSE OSMOSIS SYSTEM REMOVES?
A reverse osmosis system can treat for a variety of contaminants including:
(Taste, Odor, and Colour Organic Molecules)