What is Reverse Osmosis (RO) Water Purification?
" How Reverse Osmosis (RO) Water Purification Works and Why It's Preferred
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What is RO Water Purification?
Reverse osmosis (RO) is a filtration technology that removes dissolved substances, heavy metals, microorganisms, and unpleasant odors from water with high efficiency. The semi-permeable RO membrane traps harmful particles while allowing water molecules to pass through, resulting in water that is both safe for drinking quality and health.
Filter Stages in an RO System
Sediment Filter (5–1 micron): Traps particles such as sand, sediment, and rust, protecting the membrane.
Activated Carbon Block: Reduces odor, off-flavors, and chlorine.
RO Membrane: Highly removes contaminants such as dissolved solids (TDS), heavy metals, nitrate, and arsenic.
Post-Carbon (Sweetener): Gives water a neutral and mild taste.
(Optional) Mineral/Alkaline Filter: Balances pH by adding minerals such as calcium and magnesium.
RO Advantages
High Purification Efficiency: Effective against a wide range of contaminants.
Taste Improvement: Eliminates odor and chlorine taste, making it easier to drink.
Economical and Ecological: Long-term savings and reduced plastic waste compared to demijohns.
Flexible Installation: Various models available for under-counter, countertop, and with or without a pump.
TDS and Taste Balance
As TDS (Total Dissolved Solids) decreases, contaminants decrease; however, excessively low TDS can impair taste perception. Therefore, systems with post-carbon and mineral/alkaline filters are often preferred.
Who Should Choose RO?
Those experiencing high TDS, odor, and chlorine issues in tap water
Families with infants and sensitive skin
Those who want to avoid the cost of demijohns
FAQ
Is RO water healthy?
RO effectively reduces contaminants. pH can be balanced with a mineral filter.
How often are filters changed?
It varies depending on usage and water quality; you can find the general table in article 3.
Is RO water purification cheaper than bottled water?
In the medium term, it is more economical for most households.